Journal articles: 'Post-tensioned prestressed concrete construction'

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Liu, Shu Yue, and Wei Ling Wang. "Research on Post-Tensioned Prestressed Concrete Construction Technology in Construction Engineering." Advanced Materials Research 700 (May 2013): 221–24. http://dx.doi.org/10.4028/www.scientific.net/amr.700.221.

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Study of bonded post-tensioned prestressed concrete construction technology, from materials, equipment, channel reservation, prestressed reinforcement material installation, concrete pouring, the prestressed tendons tension and grouting of anchor seal is described from the aspects of the construction of the link, the specific operation steps, summarizes the method of construction, improve the following prestressed concrete construction understanding.

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Le, Thanh-Cao, Thi Tuong Vy Phan, Trung-Hau Nguyen, Duc-Duy Ho, and Thanh-Canh Huynh. "A Low-Cost Prestress Monitoring Method for Post-Tensioned RC Beam Using Piezoelectric-Based Smart Strand." Buildings 11, no. 10 (September 25, 2021): 431. http://dx.doi.org/10.3390/buildings11100431.

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This study proposes a cost-effective prestress monitoring method for post-tensioned reinforced concrete (RC) beams using a smart strand. Firstly, the concept of a piezoelectric-based smart strand and its implementation for prestress force monitoring are developed. The smart strand is prepared by embedding inexpensive and high-sensitivity electromechanical impedance (EMI) sensors in a steel strand. Next, the feasibility of the proposed method is experimentally verified for prestress force monitoring of a simple supported post-tensioned RC beam. A smart strand prototype is fabricated and embedded into a 6.4 m RC beam which is then prestressed with different levels. For each prestress level, the EMI responses of the smart tendon are measured and the EMI features are extracted for prestress force monitoring. The results showed that the EMI signals of the smart strand showed strong resonant peaks that varied sensitively to the prestress level of the beam. The prestress change in the prestressed RC beam was successfully estimated by using linear regression models of the EMI features.

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Jiang, Yin Jun, and Yong Hua Zhu. "Simulation of Electric Heating Prestressed Concrete Component." Advanced Materials Research 243-249 (May 2011): 1018–22. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1018.

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Because channel quality defects of post-tensioned prestressed concrete construction cannot be discovered on time, an electric heating method is put forward to produce effective detection. The results of the numeric simulation on the temperature field of a prestressed concrete component show that the electric heating infrared detection method, for its energy consumption, efficiency and safety, is feasible for detecting the channel quality of prestressed concrete component, but the electric current needs to be controlled to avoid high temperature which affects the physical and mechanical properties of the strand and the concrete.

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Szydłowski, Rafał. "Concrete Properties for Long-Span Post-Tensioned Slabs." Materials Science Forum 926 (July 2018): 122–27. http://dx.doi.org/10.4028/www.scientific.net/msf.926.122.

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In contrast to foreign practice, in Poland, for many years, there has been a belief, that in prestressed constructions, more expensive concretes on basalt aggregates should be applied. This habit is due to the low quality of national river and fossil aggregates. They allow to obtain low concrete strength and modulus of elasticity. In the paper, basing on two examples of post-tensioned slabs, it has been shown, that it is possible to use concretes with a low value of modulus of elasticity for large-span slabs. These results may be significant in popularizing the use of post-tensioned slabs in buildings in poorer countries, making them cheaper in execution.

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Wight, Gavin D., Jason M. Ingham, and Andrew R. Wilton. "Innovative seismic design of a post-tensioned concrete masonry houseThis article is one of a selection of papers published in this Special Issue on Masonry." Canadian Journal of Civil Engineering 34, no. 11 (November 2007): 1393–402. http://dx.doi.org/10.1139/l07-104.

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Post-tensioned concrete masonry walls provide improved seismic performance, but have had limited application in seismic regions because of a lack of research pertaining to their in-plane response. Following focused research over recent years, a consortium of product suppliers has collaborated with the University of Auckland to construct New Zealand’s first post-tensioned concrete masonry house. A feature of this innovative design was that all incorporated products were commercially available, with no proprietary products being specifically developed for the prestressed masonry system used. Consequently, it is hoped that this house will be a showcase, and provide exposure for the technology in New Zealand and elsewhere. This paper provides a brief review of previous post-tensioned concrete masonry research applications, then discusses post-tensioning details and their application to house design and construction.

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Kraľovanec, Jakub, František Bahleda, Jozef Prokop, Martin Moravčík, and Miroslav Neslušan. "Verification of Actual Prestressing in Existing Pre-Tensioned Members." Applied Sciences 11, no. 13 (June 27, 2021): 5971. http://dx.doi.org/10.3390/app11135971.

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In the case of prestressed concrete structures, information about the actual state of prestressing is an important basis for determining their load-carrying capacity as well as remaining service life. During the service life of the prestressed concrete structure, the initial level of prestressing is inevitably reduced as a result of the actions of various factors. These reductions of prestressing force are considered as prestress losses, which are influenced by construction stages, used materials, prestressing technology, or required length of service life. Available standards enable the determination of the expected values of prestress losses. Ultimately, their calculation is part of the design procedure of every prestressed concrete structure. However, aging and often neglected infrastructure in Europe is also exposed to factors, such as environmental distress, that are not considered in standard calculations. Therefore, verified and reliable methods for determining the actual state of prestressing are needed. This paper presents an experimental program of an indirect method for the evaluation of the value of prestressing force in seven prestressed concrete sleepers. Particularly, the non-destructive saw-cut method as a pivotal object of this study is performed and assessed. Furthermore, the Barkhausen noise technique is used as a comparative method. Subsequently, the experimental campaign is supported by the numerical analysis performed in the ATENA 3D software. Finally, the experimentally determined values of residual prestressing force are compared to the expected level of prestressing according to Eurocodes.

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Breen, John E., Michael E. Kreger, Christopher D. White, and Gordon C. Clark. "Field evaluation and model test of a composite wing-girder bridge." Canadian Journal of Civil Engineering 14, no. 6 (December 1, 1987): 753–62. http://dx.doi.org/10.1139/l87-113.

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This paper presents the key observations and conclusions from the evaluation of an innovative "loose-fit" composite, post-tensioned concrete wing-girder bridge proposed for an elevated interstate highway expansion in an urban environment. The evaluation program included both testing to destruction of a 1/2-scale model of a partial span as well as construction monitoring and field testing at service load levels of a full-scale prototype two-span bridge. Results of both construction measurements and loading tests were compared with analytical predictions. Laboratory tests showed the composite behavior of the wing-girder joint to be fully effective and a high level of load transfer between wings to be present. Recommendations for modification of the prototype design are made to improve constructibility, durability, structural performance, and economy. Key words: box girder, bridge, post-tensioned, prestressed concrete, reinforcement, stresses, temperature, tendons.

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Liu, Hong Wei. "Shallow Talk Steel Strand Pre-Tensioned Prestressed Hollow Plate Beam Construction Craft and Quality Control." Applied Mechanics and Materials 204-208 (October 2012): 2278–81. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.2278.

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With the development of prestressing technology, steel strand first should the hollow plate beam of prestressed concrete get in the upper part structure of the highway bridge extensive application, to steel strand first should prestressed concrete hollow plate beam construction quality of quality, not only direct relation arrive bridge of normal usage, also in the meantime relation arrive bridge of safety degree and durable. Therefore acquaint with in the beam system make the process with control first a construction a craft with work well quality control the key being very. This text combine a construction to practice, to steel strand first should prestressed concrete hollow plate beam construction craft, quality control the etc problem make an introduction.

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Wang, Li, Donghui Cheng, Enxiang Qu, Daoming Zhang, and Chun Lv. "Calculation of Additional Internal Forces in Post-Tensioned Prestressed Concrete Frame Columns Based on Equivalent Lateral Stiffness." Buildings 12, no. 5 (May 12, 2022): 644. http://dx.doi.org/10.3390/buildings12050644.

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The additional internal forces in vertical members caused by prestressed tendons are typically overlooked in the design of post-tensioned prestressed concrete. A calculation method for additional internal forces in single-story multi-span prestressed concrete frame columns based on equivalent lateral stiffness is proposed in this paper. The slope-deflection equation for the bar element was presented using Timoshenko beam assumptions, taking into account the influence of shear and bending deformations. Subsequently, the concept of equivalent lateral stiffness and calculation equations were proposed. On this basis, the equations of the third shear and third bending moment for single-story multi-span prestressed frame columns were established. Furthermore, applying engineering examples, the method in this study was verified by ABAQUS software and previous methods. The results show that theoretical values and FEA results are in good agreement. Compared to previous methods, the method in this paper is more accurate and widely applicable. In addition, the stretching plan has a significant path effect and time-varying effect on the interlayer distribution of the third moment. It should be considered at the building stage to check the calculation of the frame column.

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Jin, Ling Zhi, Qiang Fu, Xia Cao, Ning Deng, Yi Hu Chen, Min Chen, and Xiao Ming Wan. "Ansys Analysis of Post-Tensioned Unbonded Prestressed Concrete Board with Open-Hole." Advanced Materials Research 163-167 (December 2010): 1349–53. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.1349.

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Owing to the outstanding advantages of unbonded prestressed technology, it has been widely used in high-rise building floor. However, with the continuous improvement of the function requirements of the building, the boards with openings become more and more common, not only in new constructions but also in renovation projects. These holes will change the mechanical properties of the original floor, and cause stress concentration around the holes easily. This article carries on the simulation analysis by modeling the experimental model using ANSYS software, focuses on the deflection, crack and ultimate load of unbonded post-tensioned prestressed concrete board with open-hole (under uniform load in tensioning and loading stage). After making the comparative analyses to the mechanical behavior and failure mechanism under the different locations of the holes, the simulation results are compared with experimental results, shows that ANSYS can simulate the whole process of loading better, provides theoretical basis for its application and promotion in practical engineering.

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Scollard, C. R., and F. M. Bartlett. "Rehabilitation criteria for post-tensioned voided-slab bridges." Canadian Journal of Civil Engineering 31, no. 6 (December 1, 2004): 977–87. http://dx.doi.org/10.1139/l04-057.

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Current rehabilitation practices for aging, post-tensioned, voided-slab bridges typically reduce the geometric properties of the concrete cross section and so permanently increase post-tensioning stresses, change primary and secondary prestress moments, and create new primary and secondary moments because the original concrete restrains shrinkage of the new concrete. These changes affect the resistance of the rehabilitated bridge at limit states specified for new construction in the Canadian Highway Bridge Design Code (CHBDC) and may cause other limit states not currently identified in the CHBDC to govern. Rehabilitation schemes should be checked for a serviceability limit state of tensile stresses due to permanent service loads that exceed the cracking strength of the original concrete, which is typically not detailed to control crack widths. Ultimate limit states to check are (i) flexural resistance over interior supports, where the total factored demand can be increased markedly by the rehabilitation; and (ii) creep-initiated failure of concrete due to permanent compressive stresses. The application of these procedures is illustrated through example calculations for a typical continuous bridge.Key words: post-tensioned concrete, serviceability, ultimate limit state, restrained shrinkage, secondary prestress moments, critical stress, cracking.

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Cao, Zhiliang, Hao Wang, and Tong Guo. "Fragility analysis of self-centering prestressed concrete bridge pier with external aluminum dissipators." Advances in Structural Engineering 20, no. 8 (October 20, 2016): 1210–22. http://dx.doi.org/10.1177/1369433216673376.

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A novel self-centering prestressed concrete pier with external energy dissipators has been developed to realize seismic resilient performance and enhanced corrosion-resisting property. Self-centering capacity of the pier is provided by the unbonded post-tensioned tendons and damage is mostly concentrated on the replaceable dissipators. To investigate the seismic behavior of the proposed pier, a detailed analytical model considering interface opening and dissipator deformation was developed and verified through existing cyclic load tests. Based on the proposed model, a prototype reinforced concrete pier and a self-centering prestressed concrete pier with similar backbone curves are designed, and fragility analyses are conducted on the two piers through incremental dynamic analysis. One maximum drift-based performance limit state (i.e. collapse prevention) and two residual drift-based performance limit states (i.e. emergent usage and reconstruction) are defined for seismic capacity evaluation. Fragility curves indicate that the self-centering prestressed concrete pier has a slightly higher peak drift demand owing to its inferior dissipating capacity as compared with the reinforced concrete pier, while sustains a much lower residual drift demand due to its inherent self-centering characteristic.

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Patil, Mayur V., and Dr S. R. Parekar. "Nonlinear Analysis of External Post-Tensioning anchorage of Concrete Segment." International Journal for Research in Applied Science and Engineering Technology 11, no. 1 (January 31, 2023): 1010–20. http://dx.doi.org/10.22214/ijraset.2023.48754.

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Abstract: Precast concrete segmental bridges (PCSBs) have been the most common design technology used in the last decades. In these studies Non-linear structural performances of externally prestressed, precast concrete segmental bridges (PCSB). PCSBs with externally prestressed tendons have become very popular in construction because of economical and safety reasons, fast and practical construction, and outstanding serviceability. External tendons technique is widely used because it allows to inspect the cables and to replace them or to reinforce the tendons in case of damage while such kinds of actions are difficult to be taken in case of internal prestressing. It is widely recognized that segmental bridges have better durability, lower life-cycle costs and higher quality for maintenance than other types of bridges. However, there is lack of reliable computational model for analyzing behavior of post-tensioned PCSBs. Experimental analysis of bridge segment required more cost, time and effort for the analysis and also take cake of quality of material, cast process, curing, and testing. This research presents the results of stress and strain state of the local bearing area caused by a Prestressed cable anchor in reinforced concrete bridge segment. Nonlinear analysis of anchorage and rebar, concrete segment can be carried out by analytical solution calculated with the reference of ACI 318/19. ANSYS software is used for model and analyze the structure. The analysis process was carried out in 3 types : linear elastic analysis, nonlinear elastic analysis, and nonlinear analysis considering the destruction of concrete, and the value is compared with ANSYS software ( static structure).

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Zhou, Zhixiang, Jiangtao Zhang, Mou Xu, Zuwei Li, and Taixiong Zhang. "Method and Analysis of Vertically Tensioned Prestressed Concrete Beams." Structural Engineering International 14, no. 1 (February 2004): 55–59. http://dx.doi.org/10.2749/101686604777964288.

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Sun, Wei, Jun Du, Qiang Wang, and Li Sun. "Multi point monitoring method of prestressed tendon based on distributed sensors." Journal of Physics: Conference Series 2093, no. 1 (November 1, 2021): 012042. http://dx.doi.org/10.1088/1742-6596/2093/1/012042.

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Abstract This paper presents a multi-point strain monitoring method based on distributed sensors, which can monitor the multi-point stress of prestressed tendons in concrete. Firstly, the special sensor protection device is installed in the designated position of the component. Then, the sensor is placed in the device and attached to the monitored prestressing tendon. After concrete pouring, the device can form a closed space around the sensor to ensure that the sensor can freely expand and move in a small range when the prestressed tendon is tensioned. The proposed method is applied to the monitoring of the construction period and initial operation period of a large-span spatial structure, and the research results show that the method proposed in this paper can well realize the multi-point monitoring of the prestressed tendon strain in the concrete, and effectively solve the engineering problems; through the analysis of the long-term monitoring data, we can accurately grasp the influence of each construction condition on the structure stress, and clarify the actual stress state and long-term change trend of the structure. The obtained monitoring data play a positive role in guiding the construction of prestressed structure, and the construction safety can be objectively evaluated by analyzing the monitoring data.

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Li, Fumin, Xiaoya Luo, and Zhenguo Liu. "Corrosion of anchorage head system of post-tensioned prestressed concrete structures under chloride environment." Structural Concrete 18, no. 6 (May 2, 2017): 902–13. http://dx.doi.org/10.1002/suco.201600140.

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Samir, Peter, and George Morcous. "Precast Prestressed Concrete Truss-Girder for Roof Applications." Journal of Structures 2014 (December 14, 2014): 1–13. http://dx.doi.org/10.1155/2014/524156.

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Steel trusses are the most popular system for supporting long-span roofs in commercial buildings, such as warehouses and aircraft hangars. There are several advantages of steel trusses, such as lightweight, ease of handling and erection, and geometric flexibility. However, they have some drawbacks, such as high material and maintenance cost, and low fire resistance. In this paper, a precast concrete truss is proposed as an alternative to steel trusses for spans up to 48 m (160 ft) without intermediate supports. The proposed design is easy to produce and has lower construction and maintenance costs than steel trusses. The truss consists of two segments that are formed using standard bridge girder forms with block-outs in the web which result in having diagonals and vertical members and reduces girder weight. The two segments are then connected using a wet joint and post-tensioned longitudinally to form a crowned truss. The proposed design optimizes the truss-girder member locations, cross-sections, and material use. A 9 m (30 ft) long truss specimen is constructed using self-consolidated concrete to investigate the constructability and structural capacity of the proposed design. A finite element analysis of the specimen is conducted to investigate stresses at truss diagonals, verticals, and connections. Testing results indicate the production and structural efficiency of the developed system.

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Aziz, Mohamad Abdel, George Abdel-Sayed, Faouzi Ghrib, Nabil F. Grace, and Murty K. S. Madugula. "Analysis of concrete beams prestressed and post-tensioned with externally unbonded carbon fiber reinforced polymer tendons." Canadian Journal of Civil Engineering 32, no. 6 (December 1, 2005): 1138–51. http://dx.doi.org/10.1139/l05-071.

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Fiber reinforced polymer (FRP) tendons are being increasingly used nowadays in prestressing and (or) post-tensioning concrete structures. However, designers are faced with lack of practical analysis procedure that leads to proper evaluation of their structural performance, especially when bonded prestressing is combined with unbonded post-tensioning. This paper presents an analytical procedure for these beams. It examines the load–defelction characteristics and proceeds to estimate the ultimate load carrying capacity by taking into consideration the change of stress that occurs in the externally unbonded tendons during different stages of loading. The analytical procedure uses the concept of effective moment of inertia of concrete beams. The equations used are developed by ACI Committee 440, the Intelligent Sensing for Innovative Structures (ISIS) Canada Research Network, and the Comité Euro-International du Béton - Fédération International de la Précontrainte (CEB-FIP), for calculating the deflection of beams reinforced with carbon fiber reinforced polymer (CFRP) tendons. Finite element analyses have been conducted to verify the proposed analytical method. Two experimental programs were used to validate the proposed analytical method. The experimental findings of two box beams reinforced with bonded and unbonded external tendons are compared with finite element analyses and the analytical results. A full-scale test for an internally and externally prestressed double-T beam was undertaken at Construction Technology Laboratories Inc., Skokie, Illinois. The results from this experimental work were used to validate the analytical procedure.Key words: bonded CFRP tendons, concrete, post-tensioning, unbonded CFRP tendons.

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Lu, Zhao-Hui, Qi-Hao Zhou, Hai Li, and Yan-Gang Zhao. "A new empirical model for residual flexural capacity of corroded post-tensioned prestressed concrete beams." Structures 34 (December 2021): 4308–21. http://dx.doi.org/10.1016/j.istruc.2021.10.005.

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Dai, Lizhao, Lei Wang, Ming Deng, Binghui Wu, Royce W. Floyd, and Jianren Zhang. "Strengthening a 20-Year-Old Post-Tensioned Concrete Box Beam with Double-Layer Prestressed Steel Wire Ropes." Journal of Bridge Engineering 23, no. 11 (November 2018): 05018009. http://dx.doi.org/10.1061/(asce)be.1943-5592.0001301.

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He, Huan An, and Cheng Kui Huang. "Study on Restrained Expansive Deformation of Steel Fiber Reinforced Self-Stressing Concrete." Key Engineering Materials 385-387 (July 2008): 305–8. http://dx.doi.org/10.4028/www.scientific.net/kem.385-387.305.

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A new sort of high performance concrete is introduced which combines most advantages of prestressed concrete and steel fiber concrete, named steel fiber reinforced self-stressing concrete(SFFRSSC for short). Self-stressing concrete is actually a kind of expansive concrete which self-stresses, namely pre-compressive stresses, are induced by dint of some restrictions generally provided by steel bars to concrete expansion after hydration of expansive cement. As a result of chemical reaction, concrete archived prestresses by itself different from mechanical prestressed concrete, so called self-stressing concrete. By distributing short-cut steel fibers into self-stressing concrete at random, prestresses( self-stress) are created in concrete under combined restriction of steel bars and steel fibers. Thank to the pre-stresses tensile strength of concrete are significantly increased as well as cracking strength. In addition, expansive deformation of SFFRSSC can compensate the shrinkage of concrete to decrease shrinkage crack, and the steel fibers play an important role in post-crack behavior. On the other hand, self-stressing concrete can avoid the troubles of construction compared with conventional mechanical prestressed concrete. For purpose of understanding the properties of SFFRSSC, in this paper some researches were carried out to investigate the special expansive behaviors of restrained expansive deformation with restriction of steel bar as well as steel fiber. The test results indicated that steel bar and steel fiber both provide effective restrict to self-stressing concrete as result of forming prestresses in concrete.

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Cho, Ik-Sun, Suk-Koo Suh, Sang-Hee Lee, and Kyoung-Lae Park. "Design and Construction of Pre-tensioned Prestressed Concrete Box-Girders in Incheon Bridge Viaduct." IABSE Symposium Report 96, no. 4 (January 1, 2009): 168–77. http://dx.doi.org/10.2749/222137809796088693.

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Nadeem, Mohd. "Finite Element Analysis of I-Girder Bridge." International Journal for Research in Applied Science and Engineering Technology 9, no. 8 (August 31, 2021): 2084–97. http://dx.doi.org/10.22214/ijraset.2021.37747.

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Abstract: In India railway bridge structures are widely designed with the method suggested by IRS – Concrete bridge code 1997.This Code of Practice applies to the use of plain, reinforced and prestressed concrete in railway bridge construction. It covers both in-situ construction and manufacture of precast units. The Code gives detailed specifications for materials and workmanship for concrete, reinforcement and prestressing tendons used in the construction of railway bridges. After defining the loads, forces and their combinations and requirements for the limit state design, particular recommendations are given for plain concrete, reinforced concrete and prestressed concrete bridge construction. The design of I-Girder bridge superstructure (deck slab and PSC I-beam) are done by calculating bending moments, shear forces, bending resistance in transverse direction, bending resistance in longitudinal direction, checking flexural cracking. The Design of PSC I-Girders is done for Bending moments and Shear forces by Dead Load, Super Imposed Dead Load (SIDL) and Live Loads (LL). The Shrinkage strain, Creep Strain and effect of Temperature rise and fall are also determined. The design is complete for Pre-stressing cables, un-tensioned reinforcements, End cross girder, Shear connectors. I-girder superstructures are the most commonly used superstructures at cross-over location in metro bridges in india, as it has the wide deck slab and it easily permits metro’s to change tracks. I-Girder superstructure construction is component wise construction unlike U-Girders. I-Girders are constructed in casting yard and its deck slab is cast in situ, parapets are also installed on later stage. Keywords: SIDL effects, Live Load effects, Derailment effect, with or without 15% future PT margin

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Guo, Quanquan, Zhu Li, and Lian Duan. "Automatic Post-Tensioning in Prestressed Concrete Structures." Structural Engineering International 14, no. 1 (February 2004): 37–41. http://dx.doi.org/10.2749/101686604777964242.

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Syafwandi, Syafwandi, and Amier Abdul Hakim. "Planning For The Construction of Cikeas River Bridge Wiht-Prestressed Beam Structure Method. of Housing Crv Residence Case Study." ADRI International Journal of Civil Engineering 6, no. 1 (January 7, 2022): 75–87. http://dx.doi.org/10.29138/aijce.v6i1.18.

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Along with the development of the times and technological advances, present a concept that is slightly different from the concept of ordinary reinforced concrete. The combination or active combination of high compressive strength concrete and steel with high tensile strength or prestressed cables produces a concept called Prestressed Concrete. Prestressed concrete is basically concrete in which the internal stresses of a suitable magnitude and distribution are given in such a way that the stresses caused by the external loads are resisted to a desired level. In reinforced concrete bars, prestress is generally provided by pulling the reinforcing steel. In this study, I as a researcher will plan the construction of the Cikeas River Bridge with the Strategic Prestressed Beam Structure Method. Case Study of CRV RESIDENCE Housing, located on Jalan Parpostel Raya, Jatiluhur Village, Jati Asih District, with a land area of 7.5 hectares. On the south side the housing is located in Jatiasih Village area with a land area of 2.3 hectares, and the remaining 5.2 hectares is located in Bojong Kulur Village, Bogor Regency. The two housing sites are separated by the Cikeas River flow. Based on the condition of the housing area which is divided into two, to connect the two areas a connecting bridge development plan is made. In the construction of this bridge it is planned to use strategic concrete which is installed on the bridge girder beam. Since this bridge has a long stretch with a width of 9 meters and a length of 23 meters, the bridge is planned with three supports each with a pedestal distance of 11.50 meters. The reasons and objectives of the writing of the final project Assess the load planning on the bridge structure, study the strategic beam profile planning, and study the planning of Tendon requirements and the location of the Tendon position on the strategic beam The method used in calculating the PCI Girder type prestressed concrete and the Post-tensioning system is based on the design and Calculation of prestressed girder beams (Precast) using the Post-tensioning method is obtained with a beam profile with a height of H = 90 cm and a width of 70 cm with a girder span of 11.50 meters consisting of 2 VSL Ø ½ inch tendons, Uncoated type 7 wire super strands ASTM A- 416 grade 270 with 27 strands and using main reinforcement Ø 13 mm, shear Ø 12 mm, and shear connector Ø 12 mm.

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Woliński, Sz, and T. Pytlowany. "Parametric Analysis of the Sensitivity of a Prestressed Concrete Beam Using the DOE Simulation Technique." Archives of Civil Engineering 65, no. 4 (December 1, 2019): 97–112. http://dx.doi.org/10.2478/ace-2019-0049.

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AbstractThe paper presents the method of simplified parametric analysis of the sensitivity of a pre-tensioned concrete beam. The presented approach is based on the DOE (design of experiments) data collection which is simulation technique allowing for identification of variables deciding about the effectiveness and costs of designed structures. Additionally, application of the hyper-surface of the construction response allows designers to the development of multi-dimensional trade-off graphs to facilitate, the assessment of the scope of changes in random state variables permitted due to the adequate criteria and selection of their values close to optimum. Design basics, procedures and results of the presented considerations of sensitivity assessment and reliability of the structure has been shown on the example of a pre-stressed concrete beam designed in accordance with the requirements and procedures of Eurocode 2

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Ji, Jianghao, Zhiqiang Dong, Ziqing Liu, Yu Sun, Hong Zhu, Gang Wu, and Chee-Kiong Soh. "Feasibility of using Fe-SMA rebar as cracking resistance spiral stirrup in the anchorage zone of post-tensioned prestressed concrete." Structures 48 (February 2023): 823–38. http://dx.doi.org/10.1016/j.istruc.2023.01.011.

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Pinho Ramos, A., and V. J. G. Lúcio. "Post-punching behaviour of prestressed concrete flat slabs." Magazine of Concrete Research 60, no. 4 (May 2008): 245–51. http://dx.doi.org/10.1680/macr.2008.60.4.245.

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Xie, Jian, Ning Cui, Jia‐Bao Yan, and Jinghai Yu. "Experimental study on prestress losses of post‐tensioned concrete members at ultra‐low temperatures." Structural Concrete 20, no. 6 (May 13, 2019): 1828–41. http://dx.doi.org/10.1002/suco.201800264.

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Hu, Ping, Dong Qi Zhao, Hui Li, Gui Feng Song, and Yi Jun Tang. "Research of Prestressed Concrete Hollow Multi-Ribbed Composite Box Girder." Advanced Materials Research 368-373 (October 2011): 705–9. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.705.

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Base the shortcomings of pre-simple-supported post-continuous girder bridge construction, a new beam-bridge convert structure system is proposed, that is a kind of structure form of prestressed concrete hollow multi-ribbed composite box girders, the calculation method of two phase and noting are put forward. the kind of Cast-in-place assembly structure is light self-weight, force structure reasonable, easy construction, overall good and overall cost low.

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Yan, Xueyuan, Suguo Wang, Canling Huang, Ai Qi, and Chao Hong. "Experimental Study of a New Precast Prestressed Concrete Joint." Applied Sciences 8, no. 10 (October 10, 2018): 1871. http://dx.doi.org/10.3390/app8101871.

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Precast monolithic structures are increasingly applied in construction. Such a structure has a performance somewhere between that of a pure precast structure and that of a cast-in-place structure. A precast concrete frame structure is one of the most common prefabricated structural systems. The post-pouring joint is important for controlling the seismic performance of the entire precast monolithic frame structure. This paper investigated the joints of a precast prestressed concrete frame structure. A reversed cyclic loading test was carried out on two precast prestressed concrete beam–column joints that were fabricated with two different concrete strengths in the keyway area. This testing was also performed on a cast-in-place reinforced concrete joint for comparison. The phenomena such as joint crack development, yielding, and ultimate damage were observed, and the seismic performance of the proposed precast prestressed concrete joint was determined. The results showed that the precast prestressed concrete joint and the cast-in-place joint had a similar failure mode. The stiffness, bearing capacity, ductility, and energy dissipation were comparable. The hysteresis curves were full and showed that the joints had good energy dissipation. The presence of prestressing tendons limited the development of cracks in the precast beams. The concrete strength of the keyway area had little effect on the seismic performance of the precast prestressed concrete joints. The precast prestressed concrete joints had a seismic performance that was comparable to the equivalent monolithic system.

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32

Ma, Zhongguo (John), Mohsen A. Saleh, and Maher K. Tadros. "Optimized Post-Tensioning Anchorage in Prestressed Concrete I-Beams." PCI Journal 44, no. 2 (March 1, 1999): 56–73. http://dx.doi.org/10.15554/pcij.03011999.56.73.

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Yao, Gangfeng, Xueyu Xiong, and Yipeng Ge. "Cracking behavior of full-scale pre-tensioned prestressed concrete double-Tee members with steel-wire meshes." Journal of Building Engineering 44 (December 2021): 102658. http://dx.doi.org/10.1016/j.jobe.2021.102658.

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Zhou, Guangpan, Aiqun Li, Jianhui Li, Maojun Duan, Zhiyuan Xia, Li Zhu, Billie F. Spencer, and Bin Wang. "Test and numerical investigations on the spatial mechanics characteristics of extra-wide concrete self-anchored suspension bridge during construction." International Journal of Distributed Sensor Networks 15, no. 12 (December 2019): 155014771989156. http://dx.doi.org/10.1177/1550147719891561.

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This work is aimed at studying the mechanics characteristics of the self-anchored suspension bridge with extra-wide concrete girder during girder erection and system transformation. First, the determination and implementation processes of reasonable completion state were introduced briefly, taking the Hunan Road Bridge as the background project, which is the widest concrete self-anchored suspension bridge in China currently. Then, the ANSYS beam-type finite element model and field monitoring data were integrated to investigate the cable system evolutions during system transformation. Finally, the global refined finite element model was established using solid element to consider the shear lag effects in extra-wide girder. The measured data show that the cable displacements in tensioned domains were characterized by weak coherence and contraflexure characteristics. The longitudinal and transverse stresses of extra-wide girder distributed unevenly along transverse direction. The maximum shear lag coefficients of girder at completion state reached to 1.3. Moreover, small transverse compressive stress, or even the transverse tensile stress reaching to 1.80 MPa, appeared in the top plate segments. The measures including the arrangement optimization of transverse prestressed tendons and monitoring point redistribution were given. The research can provide references for the structural designing and safety control of the similar bridges.

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Roschke, Paul N., and Masamichi Inoue. "Effects of Banded Post‐Tensioning in Prestressed Concrete Flat Slab." Journal of Structural Engineering 117, no. 2 (February 1991): 563–83. http://dx.doi.org/10.1061/(asce)0733-9445(1991)117:2(563).

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Mahendra Nata, Eric Vianto, Indra Komara, Eka Susanti, and Dewi Pertiwi. "Redesign of Prestressed Concrete Structures Using the Post Tension Method: A Case Study of the Construction of Laves Mall Surabaya." Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia 7, no. 1 (March 30, 2022): 74–92. http://dx.doi.org/10.33366/rekabuana.v7i1.3220.

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In building construction, prestressed concrete is used for large spans and to increase capacity. One of them is the 16 meters long Lakes Surabaya Mall project. An important parameter is the effectiveness of the design, especially determining the parameters of the cross-sectional property. In this study, the redesign technique was used to assess the current condition in the hope that it could be modeled more effectively using cross-sectional dimensions. The design was evaluated theoretically using the concept of direct and indirect prestressing, then numerically verified using SAP2000. Prestressed beam with low relaxation PC60×12cm A416 grade 250 in the existing condition is modified using a lower dimension of 50×10cm A416 but has a grade value of 270, which is more extensive. The same data were used for criteria such as 35 MPa concrete quality, 100% load distribution factor, and 75% tendon stress percentage. The inspection results show that the transfer and service conditions are 10% smaller than the existing cross-section. A combined direct and indirect prestress loss of 19% still meets the design code.ABSTRAKDalam bidang konstruksi bangunan, beton prategang digunakan untuk bentang besar dan untuk meningkatkan kapasitas. Salah satunya adalah pada proyek Mall Lakes Surabaya sepanjang 16 meter. Parameter penting adalah efektivitas desain, terutama menentukan parameter properti penampang. Dalam penelitian ini, teknik desain ulang digunakan untuk menilai kondisi saat eksisting dengan harapan dapat dimodelkan lebih efektif dari penggunaan dimensi penampang. Desain dievaluasi secara teoritis menggunakan konsep prategang langsung dan tidak langsung, kemudian diverifikasi secara numerik dengan SAP2000. Balok prategang dengan relaksasi rendah PC60×12cm A416 grade 250 pada kondisi eksisting dimodifikasi menggunakan dimensi lebih rendah yaitu 50×10cm A416 akan tetapi memiliki nilai grade 270, yakni lebih besar. Data yang sama digunakan untuk kriteria seperti kualitas beton 35 MPa, faktor distribusi beban 100%, dan persentase tegangan tendon 75%. Hasil pemeriksaan menunjukkan bahwa kondisi transfer dan service 10% lebih kecil dari penampang eksisting. Dengan gabungan kehilangan prategang langsung dan tidak langsung sebesar 19%, yang mana masih memenuhi kaidah desain.

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Zhou, Wei, Jian Xin Zhang, and Wen Zhong Zheng. "Research on New Type of Prestressed Concrete Double Tee Floor Slabs." Advanced Materials Research 250-253 (May 2011): 2376–81. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2376.

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Prestressed concrete double Tee floor slabs are widely used for the roof of building construction. Some problems are met during the development practice of this type of precast structures. Firstly, the overhang flange of the traditional double Tee floor slab is not enough large in the view of economic and utilization. Secondly, it is not easy to dispose the skylights on the roof used double Tee floor slabs in the workshops or the gymnasiums. Thirdly, most of the beams are produced in prestressing plants, but very few productions are made in site. Therefore, a new type of prestressed concrete double Tee floor slabs have been designed with some characters such as 3.0-m outside flange, flange slabs with rectangular opening holes for the skylights or not, and the beams produced in the prestressing plants with pre-tensioning prestressing tendons or post-tensioning with the strands in site.

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Suparp, Suniti, Athasit Sirisonthi, Nazam Ali, Noha Saad, Krisada Chaiyasarn, Marc Azab, Panuwat Joyklad, and Qudeer Hussain. "Load versus Strain Relationships of Single and Continuous Span Full-Scale Pre-cast Prestressed Concrete Girders for Monorail Systems." Buildings 12, no. 8 (August 4, 2022): 1164. http://dx.doi.org/10.3390/buildings12081164.

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Full-scale testing of multiple span girders is scarce in the literature, often related to the complexity of loading setup and time constraints. The importance of full-scale tests is manifested in the fact that useful information regarding failure mechanisms can be obtained. In addition, important guidelines can be established for structural designers. Further, results from full-scale tests can help establish constitutive laws for various mechanisms involved in the response of actual structures. The structural performance of individual members can be assessed by monitoring their strains at service and ultimate loads. This study presents a comparison of experimentally monitored strains on longitudinal steel bars, stirrups, and prestressing tendons embedded in single and multi-span full-scale precast pre-tensioned girders. These girders were constructed and detailed to simulate the response of newly proposed straddle-type monorail girders. Single-span girders were tested under monotonic two-point service and ultimate loads, whereas multi-span girders were tested under both two- and four-point service and ultimate load. It was revealed that longitudinal steel and prestressing tendon strains monitored within single-span girders at service and ultimate loads were significantly higher than those recorded at corresponding locations in multi-span girders.

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Whelan, Matthew J., Brett Q. Tempest, and David B. Scott. "Post-Fire Nondestructive Evaluation of a Prestressed Concrete Double-Tee Joist Roof." Journal of Performance of Constructed Facilities 29, no. 2 (April 2015): 04014055. http://dx.doi.org/10.1061/(asce)cf.1943-5509.0000543.

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Haque, Md Nafiul, Murad Y. Abu-Farsakh, Chris Nickel, Ching Tsai, Jesse Rauser, and Zhongjie Zhang. "A Load-Testing Program on Large-Diameter (66-Inch) Open-Ended and PSC-Instrumented Test Piles to Evaluate Design Parameters and Pile Setup." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 52 (June 8, 2018): 291–306. http://dx.doi.org/10.1177/0361198118776781.

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This paper presents the results from a pile load testing program for a bridge construction project at Chalmette, Louisiana. The load testing includes three 66-in. spun-cast post-tensioned open-ended cylinder piles and one 30-in. square prestressed concrete (PSC) pile driven at four different locations along the bridge site in clayey-dominant soil. Both cone penetration tests and soil borings/laboratory testing were used to characterize the subsurface soil conditions. All test piles (TP) were instrumented with strain gauges to measure the load distribution along the length of the TPs and to measure the side and tip resistances, separately. Dynamic load tests (DLT) were performed on all TPs at different waiting periods after pile installations to quantify the amount of setup (i.e., increase in pile resistance with time). Case Pile Wave Analysis Program (CAPWAP®) analyses were performed on the DLT data to calculate the resistance distributions along the TPs. A static load test was performed only on the PSC pile and statnamic load tests (SNLT) were conducted on both pile types. Design parameters such as the total stress adhesion factor, α, and the effective stress coefficient, β, were back-calculated. The α values ranged from 0.41 to 0.86, and the β values ranged from 0.13 to 0.29. The load test results showed that SNLT overestimated the tip resistance as compared with dynamic and static load tests. Moreover, the pile tip resistance was almost constant during the testing period, and setup was mainly attributed to increase in pile side resistance with time.

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Hanna, Kromel E., George Morcous, and Maher K. Tadros. "Transverse post-tensioning design and detailing of precast, prestressed concrete adjacent-box-girder bridges." PCI Journal 54, no. 4 (September 1, 2009): 159–74. http://dx.doi.org/10.15554/pcij.09012009.159.174.

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Adekristi, Armen, Arif Abdur Rohim, and Muhammad Rizaldi Perkasa. "CATATAN TEKNIS TERHADAP STANDAR KRITERIA PEKERJAAN BETON POST-TENSION BERDASARKAN STRESSING RECORD DI JEMBATAN PULAU BALANG DAN JEMBATAN TELUK KENDARI." Jurnal HPJI 7, no. 1 (August 31, 2022): 21–32. http://dx.doi.org/10.26593/jhpji.v7i1.4550.21-32.

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Abstract Prestressed concrete technology has been growing, both in terms of materials and in terms of equipment technology. From an implementation perspective, it is very important to know the actual stress acting on the tendon, and elongation is generally used to verify the actual stress. However, the calculation of elongation using several assumptions causes differences between theoretical elongation and actual elongation measured in the field. This paper presents the elongation behavior for several types of tendons obtained from the construction of the Pulau Balang Bridge and the Teluk Kendari Bridge. This study shows that for tendons with measured elongations exceed the permitted elongation value, the actual force is verified by lift-off using a mono-jack. Keywords: prestressed concrete; theoretical elongation; measured elongations; bridge; tendon. Abstrak Teknologi beton prategang telah semakin berkembang, baik dari sisi material maupun dari sisi teknologi alat. Dari sisi pelaksanaan, sangat penting untuk diketahui tegangan aktual yang bekerja pada tendon, dan elongasi umumnya digunakan untuk memverifikasi tegangan aktual tersebut. Tetapi perhitungan elongasi yang meng-gunakan beberapa asumsi menyebabkan sering terjadi perbedaan antara elongasi teoritis dan elongasi hasil pengukuran di lapangan. Makalah ini menyajikan perilaku elongasi untuk beberapa jenis tendon yang didapat dari pembangunan Jembatan Pulau Balang dan Jembatan Teluk Kendari. Studi ini menunjukkan bahwa untuk tendon dengan elongasi aktual yang diukur di lapangan melebihi nilai yang disyaratkan, gaya yang bekerja diverifikasi melalui lift-off dengan menggunakan mono-jack. Kata-kata kunci: beton prategang; elongasi teoritis; elongasi hasil pengkuran; jembatan; tendon.

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Zheng, Fei, Guo Wen Li, Lei Yan, Peng Liu, and Gang Zhang. "Influence Analysis of Rigid Steel Framework on the Closure Section of the Bridge by Cantilever Construction Method." Applied Mechanics and Materials 204-208 (October 2012): 2265–71. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.2265.

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Nowadays,issues regarding deflections at mid-span and cracks existing on the box girder of prestressed concrete continuous rigid-frame bridge have raised researchers’ attentions in China.To solve these issues, research is conducted on the influence of rigid steel framework at closure segment of the box girder in the process of the cantilever construction of the PC continuous rigid-frame bridge. Finite element analyses are carried out through ANSYS to investigate the distributions of internal forces and stresses in rigid steel framework inside and outside the closure segment of the bridge. Further, the normal stresses of closure segment under service load and overloading conditions are evaluated and compared. Results show that the stresses redistributed to the inner rigid steel framework decrease 16.7% after post-tensioning operation, causing insufficient compressive stresses at the bottom flange of box girder around closure segment, and inner rigid steel framework may produce cracks on the bridge which should be considered seriously in the design and construction.

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Chen, Ji Hao, Sen Liu, Yu Jia Gao, and Yong Peng Sun. "Pre-Camber Analysis for Hanging Cradle Construction of Qinhe Bridge." Applied Mechanics and Materials 438-439 (October 2013): 923–25. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.923.

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In order to ensure the safety of long-span continuous prestressed concrete girder bridge constructed by hanging cradle method, a pre-camber is always made to reduce shrinkage and creep in the process of post-operation, the late loss of pre-stressed, deformation produced by live load and so on. Combining with Qinhe Bridge, how to install the pre-camber is studied in this paper. The maximum pre-cambers and their locations of every span of Qinhe Bridge are determined by the method of standard JTG D62-2004 with the finite element analysis software MIDAS/CIVIL. The results show that the final pre-camber curves calculated by the method of standard JTG D62-2004 and quadratic parabolic method have cusps, which cannot meet the standard requirements for the smooth of the bridge. But the slop of the final pre-camber curve calculated by cosine curve at the maximum pre-cambers and the pier top is zero, and the slop of curve from pier top to the mid-span is small, which satisfy the standard requirements for the smooth of bridge. Therefore, the final pre-camber curve should be calculated by cosine curve.

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Chen, Ming Zheng, Lin Qing Huang, Xiao Ying Chen, and Li Ping Wang. "The Nonlinear Finite Element Analysis to Bonded Post-Tensioned Prestressed Concrete Frame Based on Two-Stage Loading Model." Advanced Materials Research 671-674 (March 2013): 591–95. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.591.

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According to the loading character of bonded post-tensioned prestressed concrete frame, the static nonlinear finite programme in this paper could be used to analysis the whole loading process to bonded post-tensioned prestressed concrete frame, which is divided into two different stages . From the stress-strain curve of materials and considering the concrete’ tension harding and compression softening, this programme uses the layered finite element model and arc-length method to analyse the bonded post-tensioned prestressed concrete frame, during the course it considers the material nonlinearity and geometric nonlinearity in the stiffness matrix. Through the contrast to experiment , the result of the programme fits well with the experiment. The programme can be used to compute and analyse the bonded post-tensioned prestressed concrete frame.

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Kodsy, Antony, and George Morcous. "Shear Strength of Ultra-High-Performance Concrete (UHPC) Beams without Transverse Reinforcement: Prediction Models and Test Data." Materials 15, no. 14 (July 8, 2022): 4794. http://dx.doi.org/10.3390/ma15144794.

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The use of Ultra-High-Performance Concrete (UHPC) in beams has been growing rapidly in the past two decades due to its superior mechanical and durability properties compared to conventional concrete. One of the areas of interest to designers is the elimination of transverse reinforcement as it simplifies beam fabrication/construction and could result in smaller and lighter beams. UHPC has a relatively high post-cracking tensile strength due to the presence of steel fibers, which enhance its shear strength and eliminate the need for transverse reinforcement. In this paper, UHPC shear test data were collected from the literature to study the effect of the following parameters on the shear strength of UHPC beams without transverse reinforcement: compressive strength, tensile strength, level of prestressing, longitudinal reinforcement ratio, and fiber volume fraction. Statistical analysis of test data indicated that level of prestressing and tensile strength are the most significant parameters for prestressed UHPC beams, whereas longitudinal reinforcement ratio and tensile strength are the most significant parameters for non-prestressed UHPC beams. Additionally, shear strength of the tested UHPC beams was predicted using five models: RILEM TC 162-TDF, 2003, fib Model Code, 2010, French Standard NF P 18-710, 2016, PCI-UHPC Structures Design Guide, 2021, and Draft of AASHTO Guide Specification for Structural Design with UHPC, 2021. Comparing measured against predicted shear strength indicated that the French Standard model provides the closest prediction with the least scatter, where the average measured-to-predicted strength was 1.1 with a standard deviation of 0.38. The Draft of AASHTO provided the second closest prediction where the average measured-to-predicted strength was 1.3 with a standard deviation of 0.64. The other three models underestimated the shear strength.

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Nishiyama, Minehiro, and Yue Wei. "Effect of Post-Tensioning Steel Anchorage Location on Seismic Performance of Exterior Beamto- Column Joints for Precast, Prestressed Concrete Members." PCI Journal 52, no. 2 (March 1, 2007): 18–30. http://dx.doi.org/10.15554/pcij.03012007.18.30.

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Yang, Xiao Hua, Chao Yang Zhou, Xue Jun He, and Teng Chen. "Research on Post-Tensioned Unbonded Prestressed Concrete Hollowed Floor." Applied Mechanics and Materials 94-96 (September 2011): 1456–62. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.1456.

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In order to study the mechanical behaviors of post-tensioned unbonded prestressed concrete hollowed floors, a 1/4 scale post-tensioned unbonded prestressed reinforced concrete hollow slab-column structure model is used to act uniform distributed load on the floor. The test results showed that the load carrying capacity is enough. The points of maximum displacement are at the centers of slabs. By means of the experimental studies and elastic finite element analysis methods, the results showed that post-tensioned unbonded prestressed concrete hollowed floor presents anisotropy with layout of circular-tubes in one way. In direction parallel to layout of hollowed tubes, the continuity of floor is destruction and bending stiffness of slab is weakened. For studying the deformations of slab, it can still be considered continuous cross-slab in two directions.

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Pandey, M. D., and M. A. Nessim. "Reliability-based inspection of post-tensioned concrete slabs." Canadian Journal of Civil Engineering 23, no. 1 (February 1, 1996): 242–49. http://dx.doi.org/10.1139/l96-025.

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In unbonded, post-tensioned prestressed concrete slabs and beams, corrosion of prestressed tendons due to moisture ingress and their subsequent breakage has been identified as a major problem raising serious concern over the safety of aged structures. The paper presents a practical Bayesian approach to reliability assessment of such structures based on the inspection of a randomly selected sample of prestressing tendons. To minimize inspection costs, clear guidelines are presented for selecting the minimum sample size necessary to demonstrate that the annual probability of failure of an existing structure is below the target value of 10−5, implied in the Canadian Standards Association concrete design code CAN3-A23.3-M84. A systematic and cost-effective incremental strategy is developed for inspection of existing prestressed concrete structures. Key words: reliability, Bayes theorem, prestressed concrete, unbonded post-tensioned system, inspection, corrosion, probability distribution, CSA Standard CAN3-A23.3-M84, slab.

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Guo, Bin, Dongdong Chen, Linsheng Huo, and Gangbing Song. "Monitoring of Grouting Compactness in Tendon Duct Using Multi-Sensing Electro-Mechanical Impedance Method." Applied Sciences 10, no. 6 (March 16, 2020): 2018. http://dx.doi.org/10.3390/app10062018.

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The structural integrity of post-tensioning prestressed concrete structures with tendon ducts highly depends on the grouting quality in construction. This paper proposes a real-time approach to monitoring the grouting compactness in tendon ducts using the multi-sensing electro-mechanical impedance (EMI) method. When Lead Zirconate Titanate (PZT) transducers with different pre-selected dimensions are serially connected and mounted on a structure at distributed locations, each PZT provides unique resonance frequency coupled with the local structural physical property. Therefore, the impedance with multiple peaks of the serially connected multiple PZTs can be captured during a single measurement, which significantly simplifies the measurement procedure and reduces the data processing time. In addition, the wiring for the PZT sensors is also simplified. In this research, the feasibility of the proposed method was experimentally and numerically investigated to monitor the grouting compactness in a tendon duct specimen. The 3-dB mean absolute percentage deviation (MAPD) was applied to quantify the variations of the impedance signatures measured from five different grouting levels. Both experimental and numerical results verify the feasibility of using the proposed method for monitoring the grouting compactness in tendon ducts.

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Journal articles on the topic 'Post-tensioned prestressed concrete construction'

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