Relevant bibliographies by topics / Prestressed slabs

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  2. Dissertations / Theses
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Academic literature on the topic 'Prestressed slabs'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Prestressed slabs"

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Jin, Ling Zhi, Hong Mei Zhou, Qiang Fu, Xiao Jie Zhou, and Yu Lin Xie. "Brief Analysis on the Mechanical Behavior Influenced by Opening Locations of the Unbonded Prestressed Concrete Slabs." Advanced Materials Research 243-249 (May 2011): 774–78. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.774.

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The unbonded prestressed concrete slabs is usually used in big span high-rise buildings. Due to the existence of stairs, elevators, piping shafts and washroom etc，（hole drilling is usually encountered in the floor of unbonded prestressed concrete structures）, which weakens the rigidity of concrete slab, and it has different influences on the slabs with openings in different locations. Based on the contrast experiments of the unbonded prestressed concrete slab with openings in different locations subjected to uniform load, this thesis investigates and analyzes mechanical behavior of the unbonded prestressed concrete slabs with openings in different locations (central，around edge and corner) subjected to uniform load. Using the yield-line theory to calculate the ultimate bearing capacity of pre-stressed slabs with openings, and comparing from experimental results to theoretical ones, this paper puts forward some conclusions of how different opening locations impact the ultimate bearing capacity of pre-stressed slabs with openings
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Gardner, N. J. "Punching shear provisions for reinforced and presfressed concrete flat slabs." Canadian Journal of Civil Engineering 23, no. 2 (1996): 502–10. http://dx.doi.org/10.1139/l96-054.

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The validity of the CSA A23.3-94 code provisions for punching shear were compared with the punching shear results of 142 reinforced concrete flat slabs, 16 prestressed concrete flat slabs with unbonded tendons, and 17 flat slabs with unbonded prestressed and supplementary bonded reinforcement. The code prediction equations are not capable of direct verification against experimental results without using a correction factor. Using a justifiable correction factor, the CSA A23.3-94 provisions are appropriately conservative for reinforced concrete slabs but the scatter is large. However, it was concluded that the CSA A23.3-94 provisions are not conservative for prestressed concrete flat slabs. An equation is proposed to calculate the punching shear capacity of reinforced concrete and prestressed concrete slabs, which has a smaller coefficient of variation than the punching shear provisions of CSA A23.3-94, for symmetrically loaded interior columns. The critical section of the proposed method is the perimeter of the column, which is easier to justify than an arbitrary critical perimeter half the effective depth of slab from the column. Key words: reinforced concrete, prestressed concrete, flab slabs, punching shear.
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Han, Juan, and Yin Liang. "Experimental Study on Flexural Behavior of Different Damages Prestressed Concrete Hollow Slabs Strengthened with CFRP." Applied Mechanics and Materials 351-352 (August 2013): 592–95. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.592.

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The purpose of this paper is to focus on studying its flexural behavior after different damages prestressed concrete hollow slab is strengthened with CFRP.By the experimental method, twelve residential prestressed concrete hollow slabs are tested under concentrated force at the two points of the symmetrical load in order to analyze both flexural behavior and effects factored by different bonding modes.The conclusion can be drawn that the flexural behavior of prestressed concrete hollow slabs strengthened with CFRP is well-tried.It provides design suggestions and reference for prestressed concrete hollow slabs strengthened with CFRP, and also provides an experimental basis for the repairing and reinforcing practical engineering application in Wenchuan disaster area.
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Hosny, Abdelhadi, Ezzeldin Yazeed Sayed-Ahmed, Amr Ali Abdelrahman, and Naser Ahmed Alhlaby. "Strengthening precast-prestressed hollow core slabs to resist negative moments using carbon fibre reinforced polymer strips: an experimental investigation and a critical review of Canadian Standards Association S806-02." Canadian Journal of Civil Engineering 33, no. 8 (2006): 955–67. http://dx.doi.org/10.1139/l06-040.

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Behaviour of precast-prestressed hollow core slabs has been extensively studied when these slabs are subjected to positive bending moments, a practical application typical of hollow core slabs. However, in many projects it may be required to have an overhanging part of the roof to act as a cantilever. In doing so, and using precast-prestressed hollow core slabs, the slabs would be subjected to negative moments, atypical for hollow core slabs. In this paper, the behaviour of precast-prestressed hollow core slabs is experimentally investigated when they are subjected to negative bending moments. A proposed strengthening detail to increase the negative moment resistance of hollow core slabs using bonded carbon fibre reinforced polymer (CFRP) strips is presented. The CFRP strips were bonded to the top side of full-scale precast-prestressed hollow core slabs in the negative moment zone in different configurations. In two of the tested slabs the bond between the prestressing strands and the concrete was initially broken (during casting of the slabs) in the negative moment zone. The slabs with the bonded CFRP strips were tested to failure and the load–deflection behaviour was recorded. The results of the tests are presented and the strength enhancement of the hollow core slabs using the proposed technique is reported. The increase in the negative moment resistance of the CFRP-bonded hollow core slabs experimentally determined is also compared with the CSA-S806-02 prediction for the moment resistance of concrete elements with bonded CFRP strips.Key words: carbon fibre reinforced polymer (CFRP) strips, hollow core slab, flexure strengthening, prestressed concrete, precast slabs, prestressing strands.
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Li, Shiping, and Chao Song. "Mechanical performance test and analysis of prestressed lightweight aggregate concrete hollow slab." Advances in Structural Engineering 22, no. 8 (2019): 1830–44. http://dx.doi.org/10.1177/1369433219825998.

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To investigate the mechanical performance of prestressed lightweight aggregate concrete hollow slabs, a symmetric loading test was performed on eight prestressed concrete hollow slabs categorised into four groups based on their variety of coarse aggregate concrete and span, and their respective failure mode, bearing capacity, deformation performance and crack propagation were analysed. Based on the test data, a simulation model was subsequently established to simulate and analyse the test components. The test results showed that the bending process of the prestressed lightweight aggregate concrete hollow slab goes through three stages: elasticity, elasto-plasticity and plasticity. Furthermore, its bearing capacity and failure characteristics are similar to those of a prestressed ordinary concrete hollow slab. Subsequently, we derived a formula for checking the calculation of crack width by introducing a comprehensive influence coefficient of concrete Cm and combining it effectively with the formula in the current code and verified its efficacy. The calculated value of the formula agrees well with the test results, providing a reference for the application of engineering and a supplementary calculation formula for the crack width of lightweight aggregate concrete hollow slabs.
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Meng, Xian Hong, and Lin Tong. "Research Flexural Properties of Prestressed Slabs." Applied Mechanics and Materials 727-728 (January 2015): 417–20. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.417.

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This paper is aimed to study on the flexural performance of prestressed slab and prestressed composite slab ,in order to provide the reference in engineering.At first,the prestressed slab is loaded under unformly distributed load,and then prestressed plate deflection , crack measurements. According to the phenomenon and data of the test, the mechanical properties of prestressed slab is analyzed. The maximum deflection of prestressed slab satisfy the standard requirements under construction loads.
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Wang, Jiawei, Yanmin Jia, Guanhua Zhang, Jigang Han, and Jinliang Liu. "Experimental study on prestressed concrete hollow slabs in service strengthened with prestressed CFRP plates." International Journal of Structural Integrity 9, no. 5 (2018): 587–602. http://dx.doi.org/10.1108/ijsi-08-2017-0049.

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Purpose Most existing studies are confined to model beam tests, which cannot reflect the actual strengthening effects provided by prestressed carbon-fiber-reinforced polymer (CFRP) plates to existing bridges. Hence, the actual capacity for strengthening existing bridges with prestressed CFRP plates is becoming an important concern for researchers. The paper aims to discuss these issues. Design/methodology/approach Static load tests of in-service prestressed concrete hollow slabs before and after strengthening are conducted. Based on the results of the tests, the failure characteristics, failure mechanism and bending performance of the slabs are compared and analyzed. Nonlinear finite element method is also used to calculate the flexural strength of the strengthened beams prestressed with CFRP plates. Findings Test results show that prestressed CFRP plate strengthening technology changes the failure mode of hollow slabs, delays the development of deflection and cracks, raises cracking and ultimate load-carrying capacity and remarkably improves mechanical behavior of the slab. In addition, the nonlinear finite element analyses are in good agreement with the test results. Originality/value Strengthening with prestressed CFRP plates has greater advantages compared to traditional CFRP plate strengthening technology and improves active material utilization. The presented finite element method can be applied in the flexural response calculations of strengthened beams prestressed with CFRP plates. The research results provide technical basis for maintenance and reinforcement design of existing bridges.
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Mao, Ming Jie, and Qiu Ning Yang. "Study on Prestressed Concrete Slabs with Lightweight Aggregate." Advanced Materials Research 450-451 (January 2012): 338–42. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.338.

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A lightweight aggregate with low permeability was employed in the concrete slab; and the strength of the slab is mainly discussed. The purpose of present study is to evaluate experimentally the punching shear strength of lightweight concrete slab, and to propose the punching shear strength equation for the slab with lightweight aggregate concrete. The applicability of the proposed equation to the both reinforced concrete and pre-stressed concrete slabs with lightweight aggregate concrete.
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Yin, Wan Yun, Yun Lin Liu, Yi Zhang, Ke Wei Ding, Ren Cai Jin, and Shou Cheng Liu. "Combined Projects Explore the Development of Composite Slab." Applied Mechanics and Materials 256-259 (December 2012): 806–10. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.806.

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General concept of composite slab and present situation of research and development, combined with 17 China Metallurgical Group Corporation of China and Anhui Institute of architecture industry research project on cooperative development of laminated slabs, summed up the new type of prestressed concrete composite slab structure and application of large-span laminated slabs of concrete, will be the future important direction of development.
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Hassan, Ammar, Makoto Kawakami, Kyoji Niitani, and Tamio Yoshioka. "An experimental investigation of steel-free deck slabs." Canadian Journal of Civil Engineering 29, no. 6 (2002): 831–41. http://dx.doi.org/10.1139/l02-092.

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The steel-free deck slab developed in Canada used straps as a confinement system and relied on the stiffness of this confinement system rather than its strength. In this paper, a new approach, using the strength of a confinement system comprising unbonded prestressed bars, was investigated. In addition, the effect of the concrete strength and the steel ratio of the confinement system was examined. Seven large-scale one-way steel-free deck slabs were built using normal- and high-strength concrete, prestressed to different levels, and statically tested up to failure. The overall behaviour of the slabs was similar to that of slabs confined by straps. Cracking strength was not considerably enhanced. The slabs failed in punching shear mode with high loads. The new approach was not able to overcome the problem of the longitudinal crack, which developed in the tested slabs and reportedly appeared in all the steel-free slabs built or tested previously in Canada. Prestressing had a definite effect, however, on delaying the occurrence of this longitudinal crack, thereby enhancing serviceability. The paper recommends that the serviceability limit state of the steel-free slabs would be better assessed by the occurrence of the longitudinal crack, even though the ultimate capacity of the slabs is high.Key words: arch action, cracking, external prestressing, high-strength concrete, punching shear, steel-free deck slab.
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Dissertations / Theses on the topic "Prestressed slabs"

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Miltenburg, Roger J. "Membrane behaviour in one-way prestressed concrete slabs." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0007/MQ30752.pdf.

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Paine, Kevin Andrew. "Steel fibre reinforced concrete for prestressed hollow core slabs." Thesis, University of Nottingham, 1998. http://eprints.nottingham.ac.uk/11095/.

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An investigation of prestressed concrete containing steel fibres as secondary reinforcement to improve performance in shear, flexure and bond is reported. Emphasis is placed on the use of steel fibres in prestresssed extruded hollow core slabs, since these common precast elements have intrinsic difficulty in incorporating traditional secondary reinforcement due to their unique shape and manufacturing method. Two separate studies were carried out. The first study involved laboratory investigations into the bond between fibre reinforced concrete (FRC) and the prestressing strand, and the shear behaviour of laboratory-cast prestressed fibre reinforced concrete (PFRC) beams. The second part involved the factory production of fibre reinforced hollow core slabs in co-operation with a local manufacturer. The fibre reinforced hollow core slabs were subjected to conventional full-width shear tests, concentrated load shear tests, and to transverse flexure. For all laboratory cast elements, cubes, cylinders and prisms were cast to investigate compressive, tensile and flexural properties, respectively. Two types of steel fibre were investigated: hooked-end steel fibres at fibre volume fractions (Vf) of 0.5%, 1.0% and 1.5%; and amorphous metal fibres at Vf‘s of 0.28% and 0.56%. The trial production of fibre reinforced hollow core slabs necessitated the investigation of the effect of steel fibres on the extrusion manufacturing process. It was shown that fibre reinforced hollow core slabs could be adequately compacted with only slight increases in mixing water. Fibres were found to distribute randomly throughout the cross-section. However, the rotation of the augers affected the orientation of fibres, with fibres tending to align vertically in the web. It was shown that the addition of steel fibres to prestressed concrete has a negative effect on the bond between matrix and tendon, leading to longer transfer lengths. The effect of the increase in transfer length was to reduce cracking shear strengths by 4%. Shear tests showed that the incorporation of steel fibres could increase shear strength by as much as 45% for Vf = 1.5%. This increase in shear strength, known as the fibre contribution, was shown to be due to fibres bridging across the crack and an increased compressive resistance due to fibres arresting the propagation of cracks into the compressive zone. A semi-empirical equation for shear strength of PFRC elements is developed. It is given in two forms, one compatible with the present equations for prestressed concrete given in BS 8110 and Eurocode 2, and a second form compatible with that advocated for fibres in reinforced concrete. The equation makes use of equivalent flexural strength which is recognised as the most useful material property for design of FRC. The equation was found to give good correlation with the shear strength of single web beams cast both in the laboratory and under factory conditions. However, a overall strength reduction factor is required for full-width hollow core slabs to account for uneven load distribution and inconsistent web widths. This is consistent with tests on plain hollow core slabs found in the literature.
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Du, Toit André Johan. "Preslab - micro-computer analysis and design of prestressed concrete slabs." Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/17057.

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Bibliography: pages 128-132.<br>A micro-computer based package for the analysis and design of prestressed flat slabs is presented. The constant strain triangle and the discreet Kirchhoff plate bending triangle are combined to provide an efficient "shell" element. These triangles are used for the finite element analysis of prestressed flat slabs. An efficient out-of-core solver for sets of linear simultaneous equations is presented. This solver was developed especially for micro-computers. Subroutines for the design of prestressed flat slabs include the principal stresses in the top and bottom fibres of the plate, Wood/Armer moments and untensioned steel areas calculated according to Clark's recommendations. Extensive pre- and post-processing facilities are presented. Several plotting routines were developed to aid the user in his understanding of the behaviour of the structure under load and prestressing.
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CUBAS, MARIA VANESSA LA TORRE. "NUMERICAL ANALYSIS OF THE BEHAVIOR OF FLAT SLABS PRESTRESSED CONCRETE FLOORS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=20465@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>Lajes lisas de concreto protendido com cordoalhas engraxadas não aderentes têm sido empregadas em pavimentos de edificações com frequência nos últimos anos. Essa solução estrutural é ideal quando se tem uma distribuição regular dos pilares. Além disso, sabe-se que lajes de concreto protendido oferecem vantagens técnicas sobre a solução tradicional em concreto armado, principalmente para vencer vãos maiores e onde muitas vezes se exigem seções mais esbeltas. O objetivo desta dissertação é estabelecer critérios práticos para o projeto de lajes lisas protendidas, maciças ou nervuradas, visando ao atendimento dos critérios relativos ao estado limite de utilização. Com este propósito, um estudo paramétrico foi realizado no qual foram analisados as tensões nas regiões de introdução das forças de protensão e a influência da rigidez dos pilares na retenção da protensão. A investigação foi conduzida por meio de modelagens em elementos finitos, empregando elementos do tipo casca para as lajes e elementos tipo viga para os pilares. No caso das lajes nervuradas, suas mesas foram representadas por elementos casca e as nervuras por elementos viga levando em conta a excentricidade entre seus centros geométricos.<br>Concrete flat slabs prestressed with unbounded greased strands have been used in building floors over the last years. This structural solution is ideal when the columns are regularly distributed. In addition, it is known that prestressed floors have some technical advantages when compared to the traditional solution in reinforced concrete, mainly in cases of large spans and when lighter elements are required. The objective of the present work is to propose practical criteria for the design of flat slab prestressed concrete floors, for the cases of uniform thickness slabs and waffle slabs, aiming at complying with serviceability limit state. A parametric study was carried out to analyze the stress distribution in prestressing load introduction zones and the influence of the columns in retaining prestressing loads. The investigation was conducted using finite element models in which shell and frame elements were used to represent the slabs and the columns. For the case of waffle slabs, flanges and webs were modeled with shell and frame elements, respectively, taking into consideration the eccentricity between these two elements.
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Min, Jeong-Ki. "Numerical prediction of structural fire performance for precast prestressed concrete flooring systems." Thesis, University of Canterbury. Department of Civil and Natural Resources Engineering, 2012. http://hdl.handle.net/10092/6678.

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In predicting the likely behaviour of precast prestressed concrete flooring systems in fire using advanced finite element methods, an improved numerical model using the non-linear finite element program SAFIR has been developed in order to investigate the effects and the interaction of the surrounding structures and has been used extensively throughout this thesis. Note that fire induced spalling is not included in the analysis. In the numerical investigation of the new model, the reinforced concrete topping is modelled as part of the beam elements in order to predict the behaviour of single hollowcore concrete slabs, with various support conditions, under a Standard ISO fire. It is shown that the current approach using tendons that are anchored into the supporting beams leads to a major problem for precast prestressed flooring systems. In order to resolve this problem, a multi-spring connection model has been developed to include the old and new connection systems corresponding to the New Zealand Concrete Standard NZS 3101. The connection model with hollowcore slabs is validated against a published fire test. The investigation on restrained hollowcore floors is performed with various parameters and boundary support conditions. Numerical studies on various boundary support conditions show that the behaviour of hollowcore floors in fire is very sensitive to the existence of side beams. Further investigations on the effects of fire emergency beams, which reduce the transverse curvature of floors to improve fire resistance, are made on 4x1 multi-bay hollowcore floors with different arrangements of theses beams. The numerical studies show that fire emergency beams significantly increase the fire resistance. Code based equations which can calculate the shear resistance and splitting resistance are then introduced. The Eurocode equation can be modified with high temperature material properties to estimate the shear capacity of a hollowcore slab. The modified Eurocode equation which is fit to fire situations validated against the published literature with respect to shear tests in fire. The structural behaviour of single tee slabs having different axial restraint stiffness as well as the variation of axial thrust in fire is then studied. SAFIR analyses of single tee slabs show that fire performance can increase when a web support type is used that has high axial restraint stiffness. A series of test results on prestressed flat slabs conducted in United States are used to validate a simply supported numerical model. The application of multi-spring connection elements is also investigated in order to examine the feasibility of continuity.
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Gabrielsson, Henrik. "Ductility in high performance concrete structures : an experimental investigation and a theoretical study of prestressed hollow core slabs and prestressed cylindrical poles." Doctoral thesis, Luleå tekniska universitet, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16948.

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The thesis presents results from a project dealing with ductility in high performance concrete structures. The main objectives were to investigate the material and structural ductility/brittleness of prestressed structural elements of High Performance Concrete (HPC). The aim was to get a better understanding of the fracture process and to study sudden and brittle failures formed by shear stresses. The project was split into three parts: (I) Torsion of cylindrical pole elements, (II) Shear, torsion and bending of hollow core slabs, and (III) Shear, torsion and bending of cylindrical pole elements. Laboratory investigations were performed and displacements were carefully studied. The test results were compared with different code models and especially with the Modified Compression Field Theory(MCFT) proposed by Collins & Mitchell (1991). A computer program based on MCFT was written to calculate the interaction between shear, torsion and bending. One conclusion is that structures made of HPC can be as ductile as structures made of normal strength concrete. Another conclusion is that the strain-based modified compression field theory can represent failure processes in a correct way with good results.<br>Godkänd; 1999; 20061117 (haneit)
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Jayanandana, Aluthjage Don Chandrathilaka. "Continuity development between precast beams using prestressed slabs, and its effect on flexure and shear." Thesis, University of Leeds, 1989. http://etheses.whiterose.ac.uk/285/.

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Development of continuity between precast prestressed bridge girders by post-tensioning the insitu top slab In the regions of hogging moment is a relatively new technique which forms the basis for this research study. Compared to the more conventional method of using reinforcing steel in the slab over the interior supports, prestressed slabs will ensure a crack free more durable bridge deck, and will therefore reduce the maintenance costs. The effect that such a slab has on flexural and shear behaviour of the bridge deck has been studied both analytically and experimentally by considering composite beams based on M-8 standard precast beam section. Comparison of the design of bridge decks with a prestressed slab and a reinforced concrete slab indicated that a partially prestressed slab with a prestress considering up to 50% of the live load will ensure the slab remains crack free under total service load. Although secondary effects and the two stage construction of such a slab tend to increase the prestress requirement for the slab, the same two effects considerably reduce the positive midspan moments, resulting in a decrease in the prestress required in the precast beams (and thus a possible increase in the span range) for given standard precast beam sections. The experimental investigation consisted of testing eleven 1/3-scale M-8 continuous composite beams in two series, Series-A and Series-B. Series A, in which three beams were tested as double cantilevers was planned to study the effects of prestressed slab on overall flexural behaviour. A considerable improvement in crack control under service loads and a higher ratio of measured to calculated ultimate moment capacity was obtained in beams with a prestressed slab. The continuity developed using insitu prestressed slabs was very effective at all levels of loading. Recommendations have been made for the flexural design of continuous bridge decks with this type of prestressed slabs. In Series B, effect of prestressed slabs on shear strength at the continuity connection has been studied. A considerable increase in web shear cracking load was obtained for beams with prestressed slabs, resulting in a decrease In the amount of shear reinforcement required for such beams. The different methods of predicting web shear cracking strength and web crushing strength according to current design codes were compared with experimental values, and based on the results, recommendations for the design for vertical shear of composite beams subjected to hogging moments have been made.
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Aalto, Jonatan, and Elisabeth Neuman. "Comparison of Punching Shear Design Provisions for Flat Slabs." Thesis, KTH, Betongbyggnad, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215631.

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Abstract A new generation of EN 1992-1-1 (2004) also known as Eurocode 2 is under development and currently there is a set of proposed provisions regarding section 6.4 about punching shear, PT1prEN 1992-1-1(2017). It was of interest to compare the proposal with the current punching shear design provisions. The aim of this master thesis was to compare the punching shear resistance obtained in accordance with both design codes. Furthermore the eect of some parameters on the resistance was to be compared. It was also of interest to evaluate the userfriendliness of the proposal. In order to meet the aim, a case study of a real 　at slab with drop panels was performed together with a parametric study of a pure ctive 　at slab. The parametric study was performed for inner, edge and corner columns in the cases prestressed, without and with shear reinforcement. It was concluded that the distance av from the column axis to the contra 　exural location has a big in　uence on the punching shear resistance. The factor ddg considering concrete type and aggregate properties also has a big impact on the resistance. The simplied estimation of av according to 6.4.3(2) in PT1prEN 1992-1-1 (2017) may be inaccurate in some cases. The length b0 of the control perimeter has a larger eect on the resistance in EN 1992-1-1 (2004) than in PT1prEN 1992-1-1 (2017). In PT1prEN 1992-1-1 (2017), studs located outside the second row has no impact on the resistance. The tensioning force in a prestressed 　at slab has a larger in　uence on the resistance in PT1prEN 1992-1-1 (2017) than in EN 1992-1-1 (2004). Furthermore, the reinforcement ratio is increased by the tendons, and thus aect the resistance in PT1prEN 1992-1-1 (2017). Clearer provisions for the denition of the support strip bs for corners and ends of walls are needed in PT1prEN 1992-1-1 (2017). It may be questionable if the reduction of the perimeter for a large supported area in accordance with 6.4.2(4) in PT1prEN 1992-1-1 (2017) underestimates the resistance v in some cases. Considering the work-load with PT1prEN 1992-1-1 (2017), more parameters are included. However, they may not require that much eort to obtain. Keywords: Punching shear, resistance, concrete, 　at slab, design provisions, Eurocode 2, case study, parametric study, shear reinforcement, prestressed vi
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Tan, Chor Suan. "Theoretical analysis of the flexural strength and behaviour of unbonded partially prestressed concrete beams and slabs with and without bonded reinforcement." Thesis, University of Canterbury. Department of Civil Engineering, 1989. http://hdl.handle.net/10092/2450.

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A modified version of the computer program written by Chan (1986) for the analysis of unbonded prestressed concrete members under third point loading was developed. The new program carries out the analysis more quickly and efficiently while still maintaining the required accuracy level. The program was used to analyse twenty-two unbonded beams with bonded steel tested in China and twelve unbonded slabs with bonded steel and a futher six unbonded slabs without bonded steel tested at the University of Canterbury. All analytical and experimental results were compared . The comparison revealed that the theoretical analyses gave good representation of the flexural behaviour of the unbonded concrete members both with and without bonded reinforcement. The report confirms the Chinese finding that the combined reinforcement index has very significant effect on the ultimate tendon stress increase and moment capacity for the unbonded members However, the effect of span-depth ratio on the flexural behaviour of unbonded partially prestressed concrete members was not significant. It is also confirmed that the unbonded members with bonded reinforcement behave in a more effective way than those without bonded reinforcement. The report recommends that bonded reinforcement should be used in design practice. Two recommendations based on experimental results are proposed for the determination of ultimate moment capacity of unbonded partially prestressed concrete members. The proposed expressions for member without bonded reinforcement is given just for comparison and it is not recommended for use in practical design. It is also recommended that the value of the combined reinforcement index chosen should be greater than 0.06 to prevent the occurrence of flexural instability and less than 0.305 for efficient design of the unbonded system. Value greater than 0.305 lead to a compression failure resulting in a low value of ultimate tendon stress increase and no increase in moment capacity.
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Subally, Pavel. "Univerzitní knihovna." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240253.

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The content of this diploma project is to design an university library in the city of Brno, Czech Republic. The object is designed as multistory building with underground stories included. The design is created based on requests brought by the investor and includes architectural, constructional and technological proposes for the building. The aim is to create not only a modern cultural and educational center but also a place of entertainment and relax for students of Vysoké Učení Technické. During the design it is taken in an account the request of having the auditorium and lecture rooms available for public, also.
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Books on the topic "Prestressed slabs"

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Diaz, Alberto Mendoza. Behavior of long prestressed pavement slabs and design methodology. Center for Transportation Research, Bureau of Engineering Research, University of Texas at Austin, 1986.

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Pajari, Matti. Shear resistance of prestressed hollow core slabs on flexible supports. Technical Research Centre of Finland, 1995.

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3

Merritt, David K. Construction of the Iowa Highway 60 precast prestressed concrete pavement bridge approach slab demonstration project. Iowa Highway Research Board, 2007.

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Merritt, David K. Construction of the Iowa Highway 60 precast prestressed concrete pavement bridge approach slab demonstration project. Iowa Highway Research Board, 2007.

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Withey, K. H. Tests on a half-scale prestressed-beam and slab bridge deck. Transport and Road Research Laboratory, Structures Group, Bridges Division, 1989.

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Wills, J. Numerical analysis of a half-scale prestressed-beam and slab bridge deck. Transport and Road Research Laboratory, Structures Group, Structural Analysis Unit, 1989.

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Wills, J. Numerical analysis of a half-scale prestressed-beam and slab bridge deck. Structural Analysis Unit, Structures Group, Transport and Road Research Laboratory, 1989.

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Fédération internationale de la précontrainte. and Fédération internationale du béton, eds. Recommendations for the design of post-tensioned slabs and foundation rafts. SETO, 1998.

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Parker, Philip M. The 2007-2012 World Outlook for Prestressed Concrete Solid and Hollow Cored Slabs and Panels. ICON Group International, Inc., 2006.

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The 2006-2011 World Outlook for Prestressed Concrete Solid and Hollow Cored Slabs and Panels. Icon Group International, Inc., 2005.

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Book chapters on the topic "Prestressed slabs"

1

Dolan, Charles W., and H. R. Hamilton. "Two-Way Slabs." In Prestressed Concrete. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_11.

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Dolan, Charles W., and H. R. Hamilton. "Continuous Slabs and Beams." In Prestressed Concrete. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_9.

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Kong, F. K., and R. H. Evans. "Reinforced concrete slabs and yield-line analysis." In Reinforced and Prestressed Concrete. Springer US, 1987. http://dx.doi.org/10.1007/978-1-4899-7134-0_8.

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Rekha, B., and R. Ravindra. "Comparative Analysis of Precast Prestressed Hollow Core Slabs." In Lecture Notes in Civil Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2826-9_43.

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Terrasi, Giovanni P., Alex Stutz, Michel Barbezat, and Luke A. Bisby. "Fire Behaviour of CFRP Prestressed High Strength Concrete Slabs." In Advances in FRP Composites in Civil Engineering. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17487-2_92.

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Friedrich, Thomas, and Ronald Klein-Holte. "Flexurally Rigid Support of Prestressed Hollow Core Slabs with Post-tensioned Beams." In High Tech Concrete: Where Technology and Engineering Meet. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_132.

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Nguyen, Hang T. N., Kang Hai Tan, and Tetsushi Kanda. "Experimental and Numerical Studies on Shear Behavior of Deep Prestressed Concrete Hollow Core Slabs." In High Tech Concrete: Where Technology and Engineering Meet. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_129.

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Sena-Cruz, J., L. Correia, G. Escusa, E. Pereira, J. Michels, and P. França. "Effect of distinct environmental actions on the durability of RC slabs strengthened with prestressed CFRP laminate strips." In Insights and Innovations in Structural Engineering, Mechanics and Computation. CRC Press, 2016. http://dx.doi.org/10.1201/9781315641645-230.

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Singh, Surinder. "Prestressed Concrete Beam and Reinforced Concrete Slab System." In Cost Estimation of Structures in Commercial Buildings. Macmillan Education UK, 1994. http://dx.doi.org/10.1007/978-1-349-13030-6_5.

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Das Gupta, N. C., and C. H. Yu. "Optimal Design of Prestressed Concrete Composite Slab by Geometric Programming." In Computer Aided Design in Composite Material Technology III. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2874-2_32.

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Conference papers on the topic "Prestressed slabs"

1

Sena-Cruz, José, Luís Correia, and Paulo França. "Behaviour of RC structures strengthened with prestressed CFRP laminates: a numerical study." In IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.0276.

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&lt;p&gt;The externally bonded reinforcement (EBR) technique is one of the most widely used strategies for the flexural strengthening of reinforced concrete (RC) with fibre reinforced polymer (FRP) materials. The EBR technique offers several structural advantages when the FRP material is prestressed. The development of high shear stresses at the ends of the prestressed FRP material can cause premature FRP peeling-off failure. This premature failure can be delayed or even avoided with the use of special end-anchorage systems, like the mechanical anchorage (MA) system and the gradient anchorage (GA) system. This paper presents an experimental and a numerical study on RC slabs strengthened in flexure with prestressed carbon FRP (CFRP) laminate strips, namely: (i) one reference slab; (ii) one slab strengthened with non- prestressed externally bonded CFRP (EB-CFRP) laminate; (iii, iv) and two slabs strengthened with prestressed EB-CFRP laminates using the MA and GA systems. The performance of these simulations was compared with results of the slabs experimentally tested up to failure. Subsequently, these models were used on a parametric study that intended to investigate the influence of different parameters affecting the behaviour of the slabs strengthened with prestressed EB-CFRP laminates.&lt;/p&gt;
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Amir, Sana, Cor van der Veen, Joost C. Walraven, and Ane de Boer. "Bearing capacity of transversely prestressed concrete deck slabs." In IABSE Conference, Copenhagen 2018: Engineering the Past, to Meet the Needs of the Future. International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/copenhagen.2018.298.

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All over the world, the safety of old structures is a question that has become increasingly important with the passage of time. In the Netherlands, there are a large number of thin, transversely prestressed concrete bridge decks, cast in-situ between the flanges of long prestressed concrete girders. These bridges date back to the 60’s and 70’s of the last century and are found to be critical in shear when analyzed using the recently implemented EN 1992-1-1:2005 (CEN 2005). With the on-going economic recession, it is an astute approach to check if such bridges can still be used for a few more decades, provided they are safe and reliable against the modern traffic loads. The results could then be applied on a wider range of structures, especially in developing countries facing economic constraints. Therefore, a prototype bridge was selected and experimental, numerical and theoretical approach was used to investigate its bearing capacity, loaded by a single and double wheelprint loadcase. Nineteen tests on a 1:2 scale model of the bridge were carried out in the laboratory. Later the bridge was modelled as a 3D solid, 1:2 scale using the finite element software TNO DIANA 9.4.4 and several nonlinear analyses were carried out. Furthermore, a theoretical analysis, using the bearing capacity obtained from the fib Model code 2010 punching shear provisions (based on the Critical Shear Crack Theory for prestressed slabs), and the experimental and numerical ultimate capacities, showed comparable results. A coefficient of variation of 11% and 9% was obtained when the experimental and the finite element analysis punching loads were compared with the theoretical results involving compressive membrane action, respectively. This led to the conclusion that the existing transversely prestressed concrete bridge decks still have sufficient residual bearing (punching shear) capacity and considerable saving in cost can be made if compressive membrane action is considered in the analysis.
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Ferreira, Wagner Badke, Lorenzo Augusto Ruschi E. Luchi, and WalnóRio Graça Ferreira. "Stability Of The Structures Designed With Prestressed Concrete Flat Slabs." In The Seventh International Structural Engineering and Construction Conference. Research Publishing Services, 2013. http://dx.doi.org/10.3850/978-981-07-5354-2_st-132-408.

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Sovják, R., P. Máca, P. Konvalinka, and J. L. Vítek. "Experimental and numerical analysis of concrete slabs prestressed with composite reinforcement." In CMEM 2009. WIT Press, 2009. http://dx.doi.org/10.2495/cmem090081.

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Xiaomeng, Hou, and Zheng Wenzhong. "Experiment and analysis on temperature distribution of prestressed concrete beams and slabs." In 2011 International Conference on Consumer Electronics, Communications and Networks (CECNet). IEEE, 2011. http://dx.doi.org/10.1109/cecnet.2011.5769127.

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Sossou, G. "Influence of Concrete Creep on Durability and Reliability Characteristics of Prestressed Composite Slabs." In Architectural Engineering Conference (AEI) 2006. American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40798(190)28.

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Sena-Cruz, José, Luís Correia, Paulo França, and Julien Michels. "Short and long-term behaviour of RC slabs strengthened with prestressed CFRP laminate strips." In IABSE Symposium, Vancouver 2017: Engineering the Future. International Association for Bridge and Structural Engineering (IABSE), 2017. http://dx.doi.org/10.2749/vancouver.2017.2475.

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Osman Letelier, Juan Pablo, Alex Hückler, and Mike Schlaich. "Application of Prestressed CFRP Textiles for the Development of Thin- Walled Concrete Structural Elements." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.0102.

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&lt;p&gt;The success story of prestressed concrete is based on the utilization of high‐strength prestressing steel which enables large compressive forces to be introduced into the concrete. However, thin‐walled concrete structures often require considerable thicknesses for the sole purpose of preventing corrosion of the steel elements. In this paper the use of prestressed Carbon Fiber Reinforced Polymer (CFRP) for the development of thin‐walled concrete structural elements is briefly presented. The transition of material to stronger, lighter and corrosion‐resistant CFRP represents a significant improvement in concrete construction. Prestressing with CFRP elements leads to more slender and thereby more economical and durable structural elements. Through the additional prestressing of a reinforcement mesh, very light and highly rigid surface structures can be constructed. Prestressing technologies have been developed and adapted for specific applications i.e. slabs and doubly curved structural elements and validated by experimental tests. This paper shows that prestressed carbon reinforced concrete can be used for more durable and efficient thin‐walled structures, allowing for more sustainable construction.&lt;/p&gt;
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Juan, Han, and Wang Ruheng. "Notice of Retraction: Experimental study on flexural behaviour of prestressed concrete hollow slabs strengthened with CFRP." In 2011 International Conference on E-Business and E-Government (ICEE). IEEE, 2011. http://dx.doi.org/10.1109/icebeg.2011.5882597.

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Maluk Zedan, Cristian, Luke Bisby, and Giovanni Terrasi. "Outcomes from a broad study on the performance of thin CFRP prestressed concrete slabs in fire." In International Conference on Performance-based and Life-cycle Structural Engineering. School of Civil Engineering, The University of Queensland, 2015. http://dx.doi.org/10.14264/uql.2016.417.

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