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Journal articles on the topic 'PDS slab'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Li, Qinci, Imma Palomeras, and Xiaohong Meng. "Lithospheric structure beneath southern Iberia and northern Morocco constrained by 3D Kirchhoff-approximate GRT imaging." Journal of Geophysics and Engineering 18, no. 2 (2021): 268–81. http://dx.doi.org/10.1093/jge/gxab012.

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Abstract The slab beneath the Alboran Sea is a consequence of the collision between two continents (Europe and Africa), which was initiated along the northeastern Spanish coast, experienced slab rollback and migrated to the area adjacent to the two continents. The tectonic background in this area includes episodes of collisions with adjacent continents as well as extension of those basins in the western Mediterranean. Here, we present three-dimensional (3D) Kirchhoff-approximate generalized Radon transform (GRT) images to further constrain the lithospheric structures previously identified by o

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Liejy, Mohammed Chyad, Ahmed W. Al Zand, Azrul A. Mutalib, et al. "Flexural Performance of a Novel Steel Cold-Formed Beam–PSSDB Slab Composite System Filled with Concrete Material." Buildings 13, no. 2 (2023): 432. http://dx.doi.org/10.3390/buildings13020432.

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In this study, the flexural performance of a new composite beam–slab system filled with concrete material was investigated, where this system was mainly prepared from lightweight cold-formed steel sections of a beam and a deck slab for carrying heavy floor loads as another concept of a conventional composite system with a lower cost impact. For this purpose, seven samples of a profile steel sheet–dry board deck slab (PSSDB/PDS) carried by a steel cold-formed C-purlins beam (CB) were prepared and named “composite CBPDS specimen”, which were tested under a static bending load. Specifically, the

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Glebov, Alexei L., Michael G. Lee, and Kishio Yokouchi. "Fast Photonic Switches with Ferroelectric Films." Advances in Science and Technology 45 (October 2006): 2640–47. http://dx.doi.org/10.4028/www.scientific.net/ast.45.2640.

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Fir st prototypes of electrooptic (EO) planar deflector switches (PDS) are fabricated with hybrid integration on Si substrates. Planar optical modules, made in silica-on-silicon technology, consist of input and output waveguide microlenses facing each other and slab waveguides in between. The modules interconnect the input and output fibers with laterally collimated light beams less than 400 m in width at distances up to 100 mm with losses lower than 3 dB. Thin lead lanthanum zirconium titanate (PLZT) films with prism-shaped electrodes grown on SrTiO3 substrates form the deflector elements. Th

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Gupta, Sushant, and Sanjeev Naval. "Analysis of Orthotropic RC Rectangular Slabs Supported on Two Adjacent Edges - A Simplistic Approach." Civil Engineering Journal 6, no. 10 (2020): 1992–2001. http://dx.doi.org/10.28991/cej-2020-03091598.

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The design of reinforced concrete slabs supported on two adjacent edges involves complex formulations. In this paper, a simplistic approach is presented for designing orthotropic slabs supported on two adjacent edges. Slab supported on two adjacent edges (existing slab) is transformed into a slab supported on three edges (equivalent slab) by taking a mirror image of the yield line pattern of two adjacent edges supported RC slabs about its unsupported edges to get the exact collapse mechanism for the slabs supported on three edges. The equivalent aspect ratio can be used in the equations alread

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Lee, Yongsook C., and Parvesh Kumar. "An alternative option to reduce lung dose for electron scar boost irradiation in post-mastectomy breast cancer patients with a thin chest wall." Journal of Radiotherapy in Practice 16, no. 1 (2016): 20–28. http://dx.doi.org/10.1017/s1460396916000467.

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AbstractAimWe evaluated water-equivalent slabs as an alternative to a bolus to reduce radiation dose to the underlying lungs during electron scar boost irradiation in breast cancer patients with a thin chest wall undergoing post-mastectomy radiation therapy.Materials and methodsPercent depth doses (PDDs) and attenuation factors were obtained for 6 MeV (the lowest electron energy in most clinics) with solid water slabs (1–10 mm by 1 mm increments) placed on top of electron cones. Scatter dose to contralateral breast caused by the solid water slabs was measured on a human-like phantom using two

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Dadzie, Donald Kwabena, and A. K. Kaliluthin. "Implications of Palm Kernel Shell-Filled Plastic Bottles on the Structural Behavior of Concrete Slab." Civil Engineering Journal 9, no. 3 (2023): 731–51. http://dx.doi.org/10.28991/cej-2023-09-03-016.

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The implications of palm kernel shell (PKS)-filled plastic bottles on the structural behaviour of concrete slabs were carried out by comparing the flexural performance of conventional solid concrete slabs to concrete slabs incorporated with plastic bottles filled with palm kernel shells and placed vertically, horizontally, and diagonally at the neutral axis of the slab as per Bubble Deck Slab technology. One-way slab specimens of size 700 × 300 × 150 mm thick were produced and subjected to a four-point flexural load test. Findings from the study indicated that: (1) The PKS-filled bottle slabs

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TEKİN, İlker. "https://www.acapublishing.com/dosyalar/baski/CEBACOM_2021_196.pdf." CEBACOM Vol:1 Issue 3 1, no. 3 (2021): 16–22. http://dx.doi.org/10.36937/cebacom.2020.003.004.

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The compressive strength of concrete could be evaluated during and after construction because of a weakness in a reinforced concrete structural member appeared. Quality control of concrete in existing and new constructions can be evaluated by several methods. If the compressive strength did not comply with the design requirements, core samples from the low strength structural members are usually taken to evaluate the structural capability. In the construction sites, compressive strengths of columns and shear walls are the most important. Also, the preparing of quite simple reports for the qual

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Abdullah, Mazin Diwan, and Khamail Abdul-Mahdi Mosheer. "Effect of Stirrups on the Behavior of Semi-Precast Concrete Slabs." Civil Engineering Journal 8, no. 8 (2022): 1653–64. http://dx.doi.org/10.28991/cej-2022-08-08-09.

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A semi-slab of precast concrete (or half-slab) is a structural system that consists of concrete at the bottom half of a slab and concrete cast in situ at the top. To avoid traditional formwork and minimize the bottom half of the slab, this section can function as formwork and reduce the thickness of precast slabs, which makes their transportation easy. The interface between precast and overtopping concrete is effective for the slab system's performance. To improve the half-slab floor system, it is needed to have a shear connector (stirrups). Therefore, to better understand the behavior of this

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Dadzie, Donald Kwabena, and A. K. Kaliluthin. "Sustainability Performance of Voided Concrete Slab Using Waste Plastic Bottles." Civil Engineering Journal 8, no. 11 (2022): 2490–510. http://dx.doi.org/10.28991/cej-2022-08-11-09.

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The present study is aimed at investigating the cost assessment of incorporating waste plastic bottles in the manufacture of voided concrete slabs; assessing the depth ratio vis-à-vis the cost reduction of incorporating waste plastic bottles in the manufacture of voided concrete slabs; assessing the energy consumption and CO2 emission obtained by incorporating waste plastic bottles in the manufacture of voided concrete slabs; and evaluating the impact of the depth ratio on embodied energy consumption and CO2 emission. The study was conducted on five types of slab specimens made: (1) convention

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Abd Al-Zahra, Bilal Ismaeel, Maitham Alwash, Ameer Baiee, and Ali A. Shubbar. "Limitations on ACI Code Minimum Thickness Requirements for Flat Slab." Civil Engineering Journal 7, no. 11 (2021): 1918–32. http://dx.doi.org/10.28991/cej-2021-03091769.

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Reinforced concrete two-way flat slabs are considered one of the most used systems in the construction of commercial buildings due to the ease of construction and suitability for electrical and mechanical paths. Long-term deflection is an essential parameter in controlling the behavior of this slab system, especially with long spans. Therefore, this study is devoted to investigating the validation of the ACI 318-19 Code long-term deflection limitations of a wide range of span lengths of two-way flat slabs with and without drop panels. The first part of the study includes nonlinear finite eleme

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Mohammed, Tamara Amer, and Hayder Mohammed Kadhim. "Effect of Pumice Stone and Sugar Molasses on the Behavior of Reinforced Concrete One-Way Ribbed Slabs." Civil Engineering Journal 8, no. 2 (2022): 334–47. http://dx.doi.org/10.28991/cej-2022-08-02-011.

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The world is currently heading towards sustainability by reducing the amount of concrete, thus reducing the total unit weight. Moreover, design construction requires materials with a higher strength-to-weight ratio. Ribbed slabs and lightweight concrete (LWC) are considered two leading sustainability facilities. This research developed an experimental study to evaluate the effects of concrete type, steel reinforcement ratio, the geometry of ribs, voiding ratio, and slab type on the structural behavior of one-way ribbed slabs. Eight of the one-way slabs were constructed using pumice stone and b

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B., Viswanath, and Sathieshkumar T. "Experimental Investigation on Composite Slab using Cold Formed Steel Sheet in Light Weight Concrete." International Journal of Trend in Scientific Research and Development 4, no. 3 (2020): 699–701. https://doi.org/10.5281/zenodo.3892542.

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Composite slab construction is emerging technique for flooring system. Concrete is a member that works well in compression and steel is a member that works extremely well in tension. By joining the two materials strength can be exploited to results in a highly efficient way. So the project is to increase the strength of the slabs by using steel sheeting as flexural member and concreting is done over the steel sheets. Experimental verification of load carrying capacity of composite slab is conducted. The steel decking of composite slab is made of cold formed profile sheeting which serves as the

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Dinesh, Kumar Suryavanshi, and Saleem Akhtar Dr. "Design Optimization of Reinforced Concrete Slabs Using Various Optimization Techniques." International Journal of Trend in Scientific Research and Development 3, no. 5 (2019): 45–58. https://doi.org/10.5281/zenodo.3589565.

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This paper presents Reinforced Concrete RC slab design optimization technique for finding the best design parameters that satisfy the project requirements both in terms of strength and serviceability criteria while keeping the overall construction cost to a minimum. In this paper four different types of RC slab design named as simply supported slab, one end continuous slab, both end continuous slab and cantilever slab are optimized using three different metaheuristic optimization algorithms named as Genetic Algorithms GA , Particle Swarm Optimization PSO and Gray Wolf Optimization GWO . The sl

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Dinesh, Kumar Suryavanshi, and Saleem Akhtar Dr. "A Review on Civil Structural Optimization." International Journal of Trend in Scientific Research and Development 3, no. 5 (2019): 59–64. https://doi.org/10.5281/zenodo.3589571.

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Reinforced Concrete RC slab is the key structural component and is used in houses to provide flat surfaces floors and ceilings . Concrete slabs are effective systems where putting columns interrupts the structures Audiences, parking lots, hotels, airports, etc. serviceability to cover the lengthy spans. From the economic point of view the total cost optimization of RC slabs is very important issue and must be the prime concern of structural optimization in near future. In recent past, metaheuristic optimization algorithms have been applied to many structural problems, and RC slabs are no excep

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Gul, Akhtar, Khan Shahzada, Bashir Alam, et al. "Experimental Study on the Structural Behavior of Cast in-situ Hollow Core Concrete Slabs." Civil Engineering Journal 6, no. 10 (2020): 1983–91. http://dx.doi.org/10.28991/cej-2020-03091597.

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An experimental work has been carried out to study the flexural behavior of cast in-situ hollow core reinforced concrete (HCRC) slabs constructed by using easy, cost effective and implementable techniques in field. The precast elements made of different easily available affordable material i.e. concrete, polyvinyl chloride (PVC) and plaster of paris having voided cross- sections of circular, rectangular and triangular shapes were incorporated in one direction during pouring of concrete with minimum flexural reinforcement to construct HCRC slabs. A total of 14 slab specimens including 02 specim

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Salihu, Fidan, Anita Gjukaj, Guxim Rrudhani, Fatos Pllana, and Meri Cvetkovska. "Influence of Axial Restraint and Fire Exposure Scenarios on the Fire Resistance of One-Way Reinforced Concrete Slabs." Civil Engineering Journal 11, no. 4 (2025): 1293–317. https://doi.org/10.28991/cej-2025-011-04-03.

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This study investigates the behavior of one-way simply supported reinforced concrete slabs under fire conditions, focusing on the effects of axial restraint and fire exposure scenarios on their fire resistance. The slabs are subjected to standard ISO 834 fire exposure, and the nonlinear analysis is carried out via the SAFIR2016 computer program, which employs the finite element method. A comparison of the numerical results with experimental results from various studies has shown good agreement. To verify the reliability of the numerical results, it is essential that the test parameters match t

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Cao, Vui Van. "Performance of NSM GFRP Retrofitted Postfire RC Slabs Under Monotonic and Cyclic Loadings." Civil Engineering Journal 10, no. 6 (2024): 1987–2006. http://dx.doi.org/10.28991/cej-2024-010-06-017.

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This study investigated the performance and mechanical properties of NSM GFRP retrofitted postfire RC slabs under monotonic and cyclic loadings. Experiments were conducted for eight RC slabs exposed to different fires. These postfire slabs were retrofitted with NSM GFRP bars, which were then monotonically and cyclically loaded until failure. The results indicated that the control slab failed in flexure, with steel yielding and a main mid-span crack. NSM GFRP retrofitted postfire slabs failed by either crushing of compressive concrete or rupture of GFRP bars. The tested slabs were characterized

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Snehal, Kitture, Kabra Nakul, and Ahire |. Jayesh Burad |. Swapnil Kate Hemant. "Experimental Study on Voided Biaxial Slab and its Application." International Journal of Trend in Scientific Research and Development 2, no. 1 (2017): 1224–28. https://doi.org/10.31142/ijtsrd7153.

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Slab is largest member which consumes concrete. If the load acting on the slab is large or clear span between columns is more, the thickness of slab increases. It leads to consume more material such as concrete and steel due to this, self weight of slab is increased. To avoid these disadvantages voided slab system is used. Reinforced concrete slab with plastic voids is a new and innovative type of construction. It is developed to allow for lighter self weight of the structure while maintaining similar load carrying capacity of a solid slab. High density polyethylene HDPE hollow spheres replace

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Hrapović, Kerim. "Structural maintenance of concrete roads: replacement of concrete slabs on the A1 West Motorway – a Case Study." Put i saobraćaj 70, no. 4 (2024): 29–37. https://doi.org/10.31075/pis.70.04.04.

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Common problems on motorways with concrete pavements include edge chipping along the edges of the concrete slabs, damaged pavement transitions (joint damage), reduced skid resistance, cracking and concrete slab migration or subsidence. To effectively repair these damages, concrete pavement rehabilitation works are carried out during periods of low usage, such as weekends and/or during night hours. During these periods, the concrete pavement will be rehabilitated in sections on individual lanes while traffic is routed on the remaining lanes.

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Mahdi, Ali Sabah, and Shatha Dehyaa Mohammed. "Structural Behavior of BubbleDeck Slab under Uniformly Distributed Load." Civil Engineering Journal 7, no. 2 (2021): 304–19. http://dx.doi.org/10.28991/cej-2021-03091655.

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In structural construction fields, reducing the overall self-weight of the structure is considered a primary objective and substantial challenge in the civil engineering field, particularly in earthquake-affected buildings and tall buildings. Different techniques were implemented to attain this goal; one of them is setting voids in a specific position through the structure, just like a voided slab or BubbleDeck slab. The main objective of this research is to study the structural behavior of BubbleDeck reinforced concrete slabs under the effect of static uniformly distributed load. The experime

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Abdulkhaliq, Mohannad, and Ali Hussein Al-Ahmed. "Behavior of GFRP Reinforced-Concrete Bubbled One-Way Slabs by Encased Composite Steel I-Sections." Engineering, Technology & Applied Science Research 14, no. 5 (2024): 16701–12. http://dx.doi.org/10.48084/etasr.8123.

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Bubbled Reinforced Concrete (RC) slabs have gained popularity in recent years as a practical construction method that eliminates unnecessary concrete in the center, thereby reducing the dead weight of the structure. This study provides a systematic framework to compare the performance and capabilities of one-way bubbled concrete slabs reinforced with Glass Fiber Reinforced Polymer (GFRP) bars and embedded steel I-sections. Four one-way concrete slabs, each with a length of 2,600 mm and a rectangular cross-sectional area of 600 mm in width and 150 mm in depth were employed. These slabs were rei

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Polyakov, V. Yu, and N. T. Dang. "BALLASTLESS BRIDGE DECK FOR HSR." World of Transport and Transportation 16, no. 2 (2018): 36–55. http://dx.doi.org/10.30932/1992-3252-2018-16-2-4.

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For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version). ABSTRACT The article is devoted to the study of oscillations of ballastless bridge deck, concrete slabs, conduct of rail fastenings, gasket layer under a rail slab of a high-speed railway. The objective of research was to achieve reduction of forces in concrete slabs and rational stiffness of elastic elements in the structure of a carrying system, depending on load, speeds and features of the model «bridge-track- vehicle». Keywords: railway, ballastless track, high-

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Mohammed, Abbas H., Huda M. Mubarak, Ali K. Hussein, Taymour Z. Abulghafour, and Dia Eddin Nassani. "Punching Shear Characterization of Steel Fiber-Reinforced Concrete Flat Slabs." HighTech and Innovation Journal 3, no. 4 (2022): 483–90. http://dx.doi.org/10.28991/hij-2022-03-04-08.

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Punching shear failure in thin slabs under concentrated loads can cause shear stresses near columns. The use of steel fiber is a practical way to improve a slab-column connection's punching strength and deformation capacity. In this study, the capacity and behavior of steel fiber-reinforced concrete flat slabs are examined under punching shear force. Ten small-scale flat slabs were tested, eight of which had steel fiber and two without. Two parameters are studied in this paper, which are the fiber volume ratio (from 0% to 2%) and the stub column load shape (circle and square). The test results

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Sultana, Shamim, Md Asafuzzoha, Hasibul Hasan, Md Sajedul Asif Farzan, and Khairul Matin. "Induction of White Spot Enamel Lesion by S. mutans Biofilm in an Artificial Mouth System and Quantification by QLF." City Dental College Journal 9, no. 1 (2012): 4–6. http://dx.doi.org/10.3329/cdcj.v9i1.11829.

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Objective: Aspects of an Artificial Mouth System (AMS) to model the caries process in bovine enamel biofilm induced white spot enamel lesions (WSEL) were analyzed. Methods: Square shaped and polished bovine enamel slabs were covered with modeling wax and 2.5 mm diameter window was prepared to expose enamel surface at the center of each slab. Artificial biofilms were grown inside an AMS on the slabs using freshly cultured S. mutans (MT8148) in suspended in phosphate buffered saline (PBS), heart infusion (HI) with 1% sucrose and PBS for 20, 30 and 40 hrs at 37°C. The severity of demineralization

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Rajaram, Shankar, and James Tuman Nelson. "High-Performance Floating Slab Track: Design and Construction Improvements Based on Lessons Learned from Prototype Slabs." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 1 (2019): 300–309. http://dx.doi.org/10.1177/0361198118823004.

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The Northgate Link extension of the Sound Transit’s Link light-rail transit system subway tunnels under the University of Washington must meet stringent vibration thresholds as agreed between Sound Transit and the university to protect vibration-sensitive research labs. To meet the vibration thresholds the design team developed a 5 Hz floating slab track with an ultra-straight rail as the appropriate solution. Considering that such a solution pushes the engineering envelope, a 440-foot prototype section with 5 Hz floating slab track and a 1000-foot section of un-isolated track with milled rail

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Shubber, Mustafa S., Thaer J. Mohammed, and Khalid M. Breesem. "Production Economical Reinforced Concrete Slabs using Eco-Friendly Material." Civil Engineering Journal 9, no. 6 (2023): 1427–36. http://dx.doi.org/10.28991/cej-2023-09-06-010.

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Concrete is a material that is strong in compression but weak in tension. To overcome this issue, reinforcement must be used to improve the tensile strength of the concrete. However, it is acknowledged that steel has its drawbacks, such as the fact that it has a high cost and corrosion potential, and the rebar is heavy, non-renewable, and non-environmentally friendly. Thus, this experimental study investigates the potential product of economical reinforced concrete slabs using eco-friendly materials. Firstly, to enhance the concrete properties, a compressive, tensile, and flexural test, also a

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Abdulkhaliq, Mohannad, and Ali Hussein Al-Ahmed. "The Flexural Behavior of One-Way Concrete Bubbled Slabs Reinforced by GFRP-Bars with Embedded Steel I-Sections." Engineering, Technology & Applied Science Research 14, no. 4 (2024): 15860–70. http://dx.doi.org/10.48084/etasr.7680.

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This study examines the behavior of polymer bubbled deck slab systems, one-way concrete slabs with polymer sphere voids reinforced with Glass Fiber-Reinforced Polymer (GFRP) rebars, and embedded I-shaped steel beams. Six one-way structural concrete slabs (2600 mm long, 600 mm wide, 150 mm deep) were tested and directly supported under two points bending. Five Bubbled Slabs (BS), one of which was un-strengthened, were compared to the reference Solid Slab (SS) without polymer spheres. Each slab had 95 polymer sphere voids of 90 mm diameter and 15.48% self-weight decrease. Several parameters, inc

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BABAYTSEV, Arseniy V., Ekaterina L. KUZNETSOVA, Lev N. RABINSKIY, and Olga V. TUSHAVINA. "INVESTIGATION OF PERMANENT STRAINS IN NANOMODIFIED COMPOSITES AFTER MOLDING AT ELEVATED TEMPERATURES." Periódico Tchê Química 17, no. 34 (2020): 1055–73. http://dx.doi.org/10.52571/ptq.v17.n34.2020.1087_p34_pgs_1055_1073.pdf.

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This work investigates the effect of carbon nanomodification on the residual stress-strain state (SSS) after molding. One of the ways to reduce residual stresses and deformities is nanomodification. The main objective was to determine the degree of influence of the nanomodification parameters on the residual SSS. Within the framework of this study, 4 slabs were made. Two slabs are made of a conventional binder with laying [010/9010] and [010/4510] and two slabs of a modified binding material with the same layer structure. For the fabricated plates, deflections were measured on each of the four

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Mabrouk, Rasha, Gehad Younis, and Osman Ramadan. "Experimental Evaluation of the Punching Shear Strength of Interior Slab-column Connections with Different Shear Reinforcement Details." Civil Engineering Journal 8, no. 9 (2022): 1977–2000. http://dx.doi.org/10.28991/cej-2022-08-09-015.

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This research aims to evaluate the effect of using different shear reinforcement details on the punching shear behavior of interior slab column connections. A comprehensive experimental program is conducted on sixteen specimens having the same concrete dimensions of 1100×1100×160 mm where the slab depth is chosen to be less than that stipulated by different design codes. The parameters under examination were the type of shear reinforcement arranged in a cross shape perpendicular to the column edges (single leg, multi-leg, and closed stirrups), the spacing between stirrups (25 and 50 mm), and t

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Makovicky, Emil, and Dan Topa. "Crankshaft chains of LEP cations as a solution to the cation size misfit." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1708. http://dx.doi.org/10.1107/s2053273314082916.

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In Pb-As and Pb-Sb sulfosalts, columns of large coordination prisms of Pb combine with intervening slabs of As- or/and Sb coordination polyhedra. The LEP of these elements dictate the configurations resembling SnS (especially for As) or inflated PbS (especially for Sb). The size misfit of cation polyhedra forces the short As-S and Sb-S bonds to form crankshaft chains. In the homologues with thicker slabs, parallel crankshaft chains and incorporation of Pb in the slabs compensate for the misfit. In the low homologues, N = 3 for sartorite series and N = 4 for andorites, the misfit becomes critic

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Ivansson, Sven M. "Designing 2D Phononic Crystal Slabs with Transmission Gaps for Solid Angle as well as Frequency Variation." Advances in Acoustics and Vibration 2009 (September 6, 2009): 1–7. http://dx.doi.org/10.1155/2009/317890.

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Phononic crystals (PCs) can be used as acoustic frequency selective insulators and filters. In a two-dimensional (2D) PC, cylindrical scatterers with a common axis direction are located periodically in a host medium. In the present paper, the layer multiple-scattering (LMS) computational method for wave propagation through 2D PC slabs is formulated and implemented for general 3D incident-wave directions and polarizations. Extensions are made to slabs with cylindrical scatterers of different types within each layer. As an application, the problem is considered to design such a slab with small s

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Al-Ateyat, Aroob, Samer Barakat, M. Talha Junaid, Salah Altoubat, Mohamed Maalej, and Raghad Awad. "Experimental and Numerical Analysis of Punching Shear of GFRP-RC Slabs." Civil Engineering Journal 10 (January 6, 2025): 344–58. https://doi.org/10.28991/cej-sp2024-010-017.

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This study investigates the punching shear behavior of Glass Fiber-Reinforced Polymer (GFRP)-reinforced concrete slabs, addressing critical gaps in current design guidelines for high-strength concrete (HSC). The objective is to evaluate the impact of concrete strength, including normal-strength concrete (NSC, 30 MPa) and HSC (60 and 90 MPa), on the punching shear resistance, bridging the lack of experimental data that limits the use of HSC in FRP-reinforced slabs. The research employs experimental testing on three full-scale slab specimens (1.5 m × 1.5 m × 0.1 m) under concentric monotonic loa

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Qadan, Hani, Amjad A. Yasin, Ahmad B. Malkawi, and Muhmmad I. M. Rjoub. "Punching Shear Strength Prediction for Reinforced Concrete Flat Slabs without Shear Reinforcement." Civil Engineering Journal 8, no. 1 (2022): 167–80. http://dx.doi.org/10.28991/cej-2022-08-01-013.

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Failure of flat slabs usually occurs by punching shear mode. Current structural codes provide an experience-based design provision for punching shear strength which is often associated with high bias and variance. This paper investigates the effect of adding a horizontal reinforcement mesh at the top of the slab-column connection zone on punching the shear strength of flat slabs. A new equation considering the effect of adding this mesh was proposed to determine the punching shear strength. The proposed equation is based on the Critical Shear Crack Theory combined with the analysis of results

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KhoderAgha, Nabil, and Gabriel Assaf. "Assessment of Ground Penetrating Radar for Pyrite Swelling Detection in Soils." Civil Engineering Journal 10, no. 3 (2024): 729–37. http://dx.doi.org/10.28991/cej-2024-010-03-05.

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Pyrite swelling in soils below buildings is a major issue. It leads to severe deformations in floor foundations. A survey is carried out at a selected site in the city of Laval, Quebec, to assess the usefulness of ground-penetrating radar (GPR) to detect deformations that may be indicative of the presence of pyrite. Four soil samples are taken from the aforementioned site to determine the soil type below the concrete slab. The results indicate the presence of limestone, moor clay, and shale sediments, which are prone to pyrite swelling. The GPR data were collected using the GSSI SIR 4000 with

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Rahman, Md Mahfuzur, Laila Tul Zannat Jyoti, Snahashish Paul, Al Ishmam, and Md Akhtar Hossain. "Mechanical and Thermal Performance of Cement Mortar Incorporating Super Absorbent Polymer (SAP)." Civil Engineering Journal 6, no. 11 (2020): 2231–44. http://dx.doi.org/10.28991/cej-2020-03091614.

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Super Absorbent Polymer (SAP) is a favorable admixture which can influence various properties of cementitious materials. It mainly improves the water retaining properties of cement-based construction materials. In this paper, an experimental program was carried out to determine the mechanical and thermal performance of cement plaster containing SAP. Firstly, the absorption capacity of SAP was determined in different loading conditions and chloride solutions. Thereafter, the optimum dosage of SAP for cement plaster was also determined from five different proportions of SAP (0.05, 0.1, 0.3, 0.5

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Hegab, Ali Ahmed, Magdy El-Sayed Kassem, and Rasha T. S. Mabrouk. "Flexural Behaviour of Prestressed Post-Tension Voided Biaxial Slab Under Uniformly Distributed Load." Civil Engineering Journal 11, no. 5 (2025): 1870–90. https://doi.org/10.28991/cej-2025-011-05-09.

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This study examines the flexural behavior of prestressed post-tensioned voided biaxial slabs under uniformly distributed loads (UDL) to evaluate structural performance, quantify material efficiency, and validate finite element models. Four full-scale slabs—solid and voided, with and without post-tensioning (PT)—were experimentally tested under UDL using a multi-level steel beam system to simulate uniform loading. Parameters such as crack initiation, deflection, and failure modes were monitored. Nonlinear finite element analysis (FEA) in ANSYS, employing Solid65 and Link180 elements, replicated

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Makovicky, Emil, Jakub Plášil, Anatoly V. Kasatkin, and Radek Škoda. "The crystal structure of Tl2.36Sb5.98As4.59S17, the lead-free endmember of the chabournéite homeotypic group." Canadian Mineralogist 59, no. 3 (2021): 533–49. http://dx.doi.org/10.3749/canmin.2000093.

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ABSTRACT The crystal structure of Tl2.36Sb5.98As4.59S17, the lead-free endmember of the chabournéite homeotypic group, from the Tl-As-Sb-rich gold deposit at Vorontsovskoye (the Urals, Russia) was determined and refined to R(obs) 0.099 for 9340 unique observed X-ray reflections. The triclinic unit-cell parameters determined from single-crystal data are as follows: a = 8.63253(19) Å, b = 16.3055(7) Å, c = 21.8196(8) Å, α = 75.094 (3)°, β = 83.631(2)°, γ = 89.303 (2)°, V = 2949.18(18) Å3 (Z = 4), space group . The crystal structure is composed of (001) slabs based on PbS and SnS archetypes, arra

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Elbialy, Samy, Mahmoud Elfarnsawy, Mohamed Salah, Ahmed Abdel-Aziz, and Wael Ibrahim. "An Experimental Study on Steel Fiber Effects in High-Strength Concrete Slabs." Civil Engineering Journal 11, no. 1 (2025): 215–29. https://doi.org/10.28991/cej-2025-011-01-013.

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This study investigated the impact of varying steel fiber ratios by volume on the performance of HSC slabs. Incorporating steel fibers into high-strength concrete (HSC) has been shown to significantly enhance its mechanical properties, particularly by improving its load-bearing capacity. Furthermore, the addition of steel fiber reduces the reliance on traditional reinforcement bars, leading to a more efficient use of materials. This not only simplifies the construction process but also contributes to a reduction in overall construction costs. This study investigated the behavior of HSC slab sp

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Rajić, Andrea, Ivan Lukačević, Davor Skejić, and Viorel Ungureanu. "Cold-formed Steel-Concrete Composite Beams with Back-to-Back Channel Sections in Bending." Civil Engineering Journal 9, no. 10 (2023): 2345–69. http://dx.doi.org/10.28991/cej-2023-09-10-01.

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Steel-concrete composite structures are very attractive because of their characteristics, which can be emphasised by using cold-formed steel instead of hot-rolled ones. This paper presents possible analytical approaches and a parametric finite element study of cold-formed steel-concrete composite beams in bending. Analysed beams are formed of back-to-back cold-formed steel channels and concrete slabs connected by demountable shear connectors. A solid concrete slab on a profiled metal sheet analysed. Also, the study investigates the influence of corrugated web between the back-to-back channels

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Cherif, Guergah, Dimia Mohamed Salah, and Benmarce Abdelaziz. "Numerical Modelling of One-Way Reinforced Concrete Slab in FireTaking Into Account of Spalling." Civil Engineering Journal 7, no. 3 (2021): 477–87. http://dx.doi.org/10.28991/cej-2021-03091667.

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This paper presents a study of the behaviour of Reinforced Concrete (RC) slabs subjected to severe hydrocarbon fire exposure. In which the spalling phenomena of concrete is to be considered. The hydrocarbon curve is applicable where small petroleum fires might occur, i.e. car fuel tanks, petrol or oil tankers, certain petro-chemical facilities, tunnels, parking structures, etc. Spalling is included using a simplified approach where elements with temperatures higher than 400 °C are assumed to occur and the corresponding thermo-mechanical response of RC slabs is evaluated. The nonlinear finite e

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Xia, Wei. "Study on vibration isolation design using elastomeric pads and its application." Vibroengineering Procedia 55 (September 27, 2024): 73–78. http://dx.doi.org/10.21595/vp.2024.24199.

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The vibration mechanism of railways and urban rail transit is highly intricate, particularly within the railway environment. This study employs a variety of vertical stiffness damping pads to develop an integrated damping system for a floating slab. Through optimization of damper stiffness and arrangement, the modal characteristics of the floating slab are analyzed, resulting in a reduction of the inherent frequency of the track structure and attenuation of vibration transmission. Subsequently, this damping system is implemented in an actual engineering project to assess its effectiveness. The

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Potharaboyena, Vinay, and Srilaxmi Kurimilla. "Structural Analysis and Design of Structural Elements of A Building." International Journal of Trend in Scientific Research and Development 2, no. 3 (2018): 1132–51. https://doi.org/10.31142/ijtsrd11237.

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Structural design is primary aspect of Civil Engineering. The very basis of construction of any building, residential house or dams or bridges, culverts, canals etc. is designing. Structural engineering has existed since humans first started to construct their own structures. The foremost basic in structural engineering is the design of simple basic components and members of a building viz., Slabs, Beams, Columns and Footings. In order to design them, it is important to first obtain the plan of the particular building. Thereby depending on the suitability plan layout of beams and the position

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Biagioni, Cristian, Yves Moëlo, Georges Favreau, Vincent Bourgoin, and Jean-Claude Boulliard. "Structure of Pb-rich chabournéite from Jas Roux, France." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 71, no. 1 (2015): 81–88. http://dx.doi.org/10.1107/s2052520614028157.

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The crystal structure of a specimen of `Pb-rich' chabournéite from Jas Roux, Hautes-Alpes, France, with the chemical formula obtained by electron microprobe analysis of Ag0.04 (1)Tl2.15 (2)Pb0.64 (1)Sb5.12 (1)As5.05 (1)S17.32 (5), has been solved by X-ray single-crystal diffraction on the basis of 36 550 observed reflections (withFo> 4σFo) with a finalR1= 0.074. Pb-rich chabournéite is triclinicP1, with unit-cell parametersa= 8.5197 (4),b= 42.461 (2),c= 16.293 (8) Å, α = 83.351 (2), β = 90.958 (2), γ = 84.275 (2)°,V= 5823 (3) Å3. Its structural formula is close to [Tl2(Pb0.8Tl0.1Sb1.1)](Sb4

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Salihu, Fidan, Zijadin Guri, Meri Cvetkovska, and Fatos Pllana. "Fire Resistance Analysis of Two-Way Reinforced Concrete Slabs." Civil Engineering Journal 9, no. 5 (2023): 1085–104. http://dx.doi.org/10.28991/cej-2023-09-05-05.

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This paper presents a fire resistance analysis of two-way reinforced concrete (RC) slabs. The study analyzes the effect of specific parameters—concrete cover thickness, span, and support conditions—on the fire resistance of the slabs. To that end, the slabs were exposed to Standard Fire ISO 834, and the 3D nonlinear numerical analyses were conducted in SAFIR2016. The results of the numerical analyses were evaluated against experimental results reported in the literature. The agreement between the two sets of results was satisfactory throughout the fire test. Nonetheless, to verify the obtained

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Indrani, V., D. K. Shubha, and E. J. Lavina. "Dynamic Analysis of Multistory RCC Building Frame with Flat Slab and Grid Slab." International Journal of Trend in Scientific Research and Development 2, no. 4 (2019): 1143–48. https://doi.org/10.31142/ijtsrd14269.

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Conventional R.C.C structure i.e flat slab, shear wall , column for different heights are modelled and analyzed for the different combinations of static loading with varying thicknesses of shear wall with varying height of multistoried building .The comparison is made between the conventional R.C.C flat slab structure of 10,20and 30 stories without shear wall . The comparison made between the conventional R.C.C flat slab structure of 10,20 and 30 stories with varying thicknesses of shear wall in multi storied buildings have been provided at some particular locations .The main objective of anal

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M., Ranjitham, and V. Manjunath N. "Experimental and numerical investigation on structural behaviour of Bubble Deck Slab with conventional slab." International Journal of Trend in Scientific Research and Development 2, no. 3 (2018): 2614–17. https://doi.org/10.31142/ijtsrd11532.

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Slab is one of the largest consuming concrete member to carrying a load. A slab being the essential part of the building and should be successfully intended and utilized. The slab requires more concrete, while constructing the co2 emission is high and it leads to global warming, hence has to be optimized. Concrete plays a major role in the construction field. The usage of concrete is high in slab construction. Multiple elements transferring and resisting external loads throughout the structure. The vertical loads acting on the slab can be transferring to the beam and then column .The gravity p

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Kevin Fauzan, Muhammad, Yelvi Yelvi, Aldo Wirastana Adinegara, and Handi Sudardja. "ANALISIS KAPASITAS DUKUNG SPUN PILE PADA PILE SLAB." Construction and Material Journal 6, no. 2 (2024): 169–83. https://doi.org/10.32722/cmj.v6i2.7037.

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Untuk menunjang Pengembangan Ekonomi Nasional (PEN) dan khususnya pengembangan dan peningkatan kegiatan ekonomi di Pulau Sumatera. Salah satunya adalah Pembangunan Jalan Tol Seksi Sicincin - Padang (STA 0+000 – 36+600) Ruas Tol Pekanbaru - Padang. Ruas jalan tol ini merupakan bagian dari sistem jaringan jalan tol Pulau Sumatera (Trans Sumatera). Pada perencanaan ini, akan dihitung kapasitas dukung dan penurunan pada fondasi spun pile di pile slab STA 7+443 – STA 7+569 Jalan Tol Sicincin – Padang yang dihasilkan dari data penyelidikan tanah berupa uji SPT (Standard Penetration Test), kemudian d

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Fouad, Marco, Mohamed N. Fayed, Gehan A. Hamdy, and Amr Abdelrahman. "Effect of Blast Loading on Seismically Detailed RC Columns and Buildings." Civil Engineering Journal 7, no. 8 (2021): 1406–25. http://dx.doi.org/10.28991/cej-2021-03091733.

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Explosions caused by standoff charges near buildings have drastic effects on the internal and external structural elements which can cause loss of life and fatal injuries in case of failure or collapse of the structural element. Providing structural elements with blast resistance is therefore gaining increasing importance. This paper presents numerical investigation of RC columns with different reinforcement detailing subjected to near-field explosions. Detailed finite element models are made using LS-DYNA software package for several columns having seismic and conventional reinforcement detai

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Lei, Tuo, Jianxiang Xu, Longxiang Xu, Tingting Jin, and Guangsen Wang. "Dynamic Analysis of CRTS II Ballastless Track-Vehicle System Based on Moving Unit Method." Applied Sciences 13, no. 11 (2023): 6566. http://dx.doi.org/10.3390/app13116566.

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On account of the influence of the discontinuity of CRTS II ballastless track slabs and the discrete support of track pads on the high-speed rail vehicle-ballastless track system, a vibration analysis calculation model of the ballastless track-vehicle coupling system was established on the basis of the moving unit method. The dynamic response of the system at different travel speeds and with and without consideration of the track plate discontinuities was investigated. The effect of the random process discontinuity on the dynamic response of the steel rails was analyzed by Fourier inverse tran

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Merytsa, Aldila Winda, Imas Istiari, Hartopo Hartopo, and Totok Apriyanto. "STUDI KOMPARASI KAPASITAS DAYA DUKUNG TIANG PANCANG SECARA ANALITIS TERHADAP HASIL UJI KALENDERING DAN PILE DRIVING ANALYZER (STUDI KASUS STRUKTUR SLAB ON PILE) PADA PROYEK PEMBANGUNAN JALAN TOL SEMARANG â€“ DEMAK PAKET 2." Jurnal Teknik Indonesia 3, no. 2 (2022): 11. http://dx.doi.org/10.61689/jti.v3i2.367.

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Semarangâ€“Demak Toll Road Construction with length Â± 27 km, built for reduce traffic jam in Semarang. Due to road construction must pass area with very soft soil conditions/swamp land. Where type soil this is known have power support very low. For resolve problem the so structure Street use structure Slab on Pile. Structure Slab on Pile consist from slab, pile head and Pile FoundationÂ Â Â Â Â Â Â Â Â Â Â Â Â Â In analyzing the carrying capacity of piles analytically in this study, we used several methods such as the Meyerhof method, the Luciano Decourt method and the Schmertman method. Mean

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