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Journal articles on the topic 'Concrete flat slabs'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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1

Makki, Ragheed, Haider Al-Katib, and Ahmed Alalikhan. "Load-defl ection behaviour of hybrid concrete flat slab." Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 28, no. 4 (2019): 516–25. http://dx.doi.org/10.22630/pniks.2019.28.4.47.

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Due to the important role of high strength concrete in the structural systems, present work focuses on the use of this material as a strengthening technique incorporating with the normal strength concrete in flat slab system. Eight simply supported flat slab models with (1,000 × 1,000 × 120 mm) dimensions are investigated based on three groups including normal strength concrete and high strength concrete. The first group represents models containing of two flat slabs fully with one type of concrete; NSC and HSC as control flat slab. The second and third groups consist of six flat slabs as hybr
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2

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 co
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3

Ghoreishi, Mehrafarid, Ashutosh Bagchi, and Mohamed Sultan. "Review of the Punching Shear Behavior of Concrete Flat Slabs in Ambient and Elevated Temperature." Journal of Structural Fire Engineering 4, no. 4 (2013): 259–80. http://dx.doi.org/10.1260/2040-2317.4.4.259.

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There are a number of benefits associated with two-way concrete flat slab construction for office buildings, parking garages and apartments - for example, reduced formwork, prompt erection, flexibility of partitions, and minimal increase in story heights. However, concrete flat slabs could be quite vulnerable to punching shear failure in the event of a fire. The objective of the present article is to provide a state of the art review of the existing research and the issues associated with concrete flat slabs in fire and elevated temperature. There are a number of experimental and analytical st
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4

Fillo, Ľudovít, Jaroslav Halvonik, and Viktor Borzovič. "Punching of Concrete Flat and Foundation Slabs." Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series. 14, no. 1 (2014): 1–7. http://dx.doi.org/10.2478/tvsb-2014-0001.

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Abstract This paper deals with punching of flat and foundation slabs. Te paper presents limiting values of maximum punching resistance of these slab structures with sudden and brittle mode of failure. In the paper are introduced graphs for design of flat and foundation slab thickness depending on load intensity, span length and reinforcement ratio.
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5

Sherif, Alaa G., and Walter H. Dilger. "Analysis and deflections of reinforced concrete flat slabs." Canadian Journal of Civil Engineering 25, no. 3 (1998): 451–66. http://dx.doi.org/10.1139/l97-102.

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The results of a test on a full-scale 5 m continuous slab are used to study the methods of analysis and calculation of deflection of reinforced concrete flat slabs. The most commonly used methods for the analysis of flat slabs, namely the equivalent frame method, the prismatic member method, the direct design method, and the finite element method, are critically compared using the results of the slab tested. Based on the comparison with the unbalanced column moments in the test, improvements for the prismatic member method are suggested. For the deflection calculations of cracked reinforced co
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6

MUSSE, T. H., E. A. P. LIBERATI, L. M. TRAUTWEIN, R. B. GOMES, and G. N. GUIMARÃES. "Punching shear in concrete reinforced flat slabs with steel fibers and shear reinforcement." Revista IBRACON de Estruturas e Materiais 11, no. 5 (2018): 1110–21. http://dx.doi.org/10.1590/s1983-41952018000500011.

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Abstract Steel fibers in reinforced concrete increase the performance of slab-column connection once they increase ductility and energy absorption capacity of the concrete. The use of fibers in flat slabs may increase strength and change the mode of failure. The objective of this work is to present an experimental evaluation of punching shear strength of reinforced concrete flat slab with steel fibers and punching shear reinforcement. Eight square slabs, size 1800 mm by 1800 mm by 130mm, were loaded until failure by punching shear around the column. The models were divided in two groups, depen
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7

Shwalia, Ali Sabah Imran, Nabeel Hasan Ali Al-Salim, and Haider M. Al-Baghdadi. "Enhancement Punching Shear in Flat Slab Using Mortar Infiltrated Fiber Concrete." Civil Engineering Journal 6, no. 8 (2020): 1457–69. http://dx.doi.org/10.28991/cej-2020-03091560.

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In this paper, improving the punching shear of slab column connection using mortar infiltrated fiber concrete is studied. Eight specimens of reinforced concrete slabs identical in dimension and reinforcement were tested, six of them were casting with hybrid concrete (normal strength concrete and mortar infiltrated fiber concrete) and two specimens were cast with normal strength concrete as control specimens. All specimens were tested under vertical loading. The mortar infiltrated fiber concrete was cast monolithically with the normal strength concrete at different thickness at one and a half t
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8

Helal, Rawnaq Abbas, Haider M. Al-Baghdadi, and Nabeel Hasan Ali Al-Salim. "Using Mortar Infiltrated Fiber Concrete as Repairing Materials for Flat Slabs." Civil Engineering Journal 6, no. 10 (2020): 1956–73. http://dx.doi.org/10.28991/cej-2020-03091595.

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This search aims to study and test the effect of using a new material (mortar infiltrated fiber concrete) as repair material in crucial regions that need a special type of repair like (deck of bridges, pavements, and defense structures). This work consisted of three stages: the first stage; testing the engineering properties of slurry infiltrated fiber concrete (compressive, splitting tensile, flexural and bond strengths), by using different types of fibers (End hooked steel fiber, Micro steel fiber, Polypropylene fiber, and Synthetic fiber), in five different types of mortar infiltrated fiber
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9

Guan, Hong, and Yew-Chaye Loo. "Flexural and Shear Failure Analysis of Reinforced Concrete Slabs and Flat Plates." Advances in Structural Engineering 1, no. 1 (1997): 71–85. http://dx.doi.org/10.1177/136943329700100108.

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A nonlinear layered finite element procedure is presented for flexural and shear failure analysis of reinforced concrete slabs and flat plates. A degenerated shell element employing a layered discretization scheme is adopted. This provides a simple and effective means of accounting for the nonlinear behaviour of concrete and steel reinforcement over the thickness of the slab or flat plate. The procedure is capable of determining the load-deflection response, the ultimate load capacity and crack patterns of concrete slab structures, as well as computing the punching shear strength at slab-colum
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10

Simmonds, Sidney H., and Brian W. Doblanko. "Shear-moment transfer in flat plates." Canadian Journal of Civil Engineering 13, no. 3 (1986): 327–34. http://dx.doi.org/10.1139/l86-045.

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For many concrete slabs without beams, the critical design factor is the shear stress in the vicinity of the column–slab junction. This is particularly so near edge and corner columns where the shear stresses due to the unbalanced moments may account for the major portion of these stresses. The determination of these design stresses in accordance with the provisions of Standard CAN3-A23.3-M84 is both time consuming and subject to numerical mistakes. Based on these provisions, design charts were developed, which greatly reduce the amount of calculation required and are suitable for routine use
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11

Fillo, Ľudovít, Tomáš Augustín, Andrej Bartók, and Ondrej Keseli. "Resistance of Flat Slabs with Openings." Solid State Phenomena 259 (May 2017): 209–14. http://dx.doi.org/10.4028/www.scientific.net/ssp.259.209.

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Flat slabs - locally supported slabs are an important and preferred type of modern buildings structures. The column – slab contact point has the concentration of compression but especially shear and tensile stresses which may cause sudden failure – punching of slabs. The paper deals with the analysis of flat slab sample with two openings near the column - the typical example of real structures. The results are presented only for one size and location of openings. Material properties for analysis were obtained from experimental work carried out at the Department of Concrete Structures at STU in
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12

Sacramento, P. V. P., M. P. Ferreira, D. R. C. Oliveira, and G. S. S. A. Melo. "Punching strength of reinforced concrete flat slabs without shear reinforcement." Revista IBRACON de Estruturas e Materiais 5, no. 5 (2012): 659–91. http://dx.doi.org/10.1590/s1983-41952012000500005.

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Punching strength is a critical point in the design of flat slabs and due to the lack of a theoretical method capable of explaining this phenomenon, empirical formulations presented by codes of practice are still the most used method to check the bearing capacity of slab-column connections. This paper discusses relevant aspects of the development of flat slabs, the factors that influence the punching resistance of slabs without shear reinforcement and makes comparisons between the experimental results organized in a database with 74 slabs carefully selected with theoretical results using the r
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13

Wen Jing, Dickson Fong, and Lau Teck Leong. "Effect of Aggregate Size on Punching Strength of Reinforced Concrete Slabs." Applied Mechanics and Materials 835 (May 2016): 450–54. http://dx.doi.org/10.4028/www.scientific.net/amm.835.450.

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This paper reports test results of flat slab cast from micro-concrete and normal concrete subjected to concentric punching shear. Although the punching shear failure mechanism of micro-concrete slabs was very similar to that of normal-concrete slabs, the punching shear capacity is reduced to about 73% due to the reduction in transferred shear stresses across shear cracks by aggregate interlock. Therefore, a shear retention factor of 0.7 is suggested to be applied in estimating the punching shear strength of micro-concrete slabs.
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14

A. Alwash, Nameer, and Fatimah H. Naser Al-Mamoori. "Behavior of The RC Slab-Beam System Using Self Compacting Concrete." International Journal of Engineering & Technology 7, no. 4.20 (2018): 507. http://dx.doi.org/10.14419/ijet.v7i4.20.26252.

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The present study includes an experimental investigation of the behavior of square reinforced concrete slabs. These slabs are with and without edge beams under uniformly distributed load with corner supports using two types of self compacting concrete (SCC), the first type of SCC incorporated limestone filler and the other was without filler, the results obtained are compared with those obtained from conventional concrete (CC).The experimental program consists of testing nine square slab samples. Three of these slab samples are flat in shape with panel dimensions of 1050×1050×50 mm depth. The
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15

Zhuravskyi, Oleksandr, and Vladyslav Tymoshchuk. "Calculation of flat reinforced concrete slabs strengthened by post-stressed rebars in two directions." USEFUL online journal 2, no. 4 (2018): 63–69. http://dx.doi.org/10.32557/useful-2-4-2018-0007.

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The purpose of the dissertation research is to carry out theoretical calculations and the experimental confirmation of the possibility of strengthening the flat reinforced concrete slabs with external stressed reinforcement, and influence of such strengthening on the subsequent operation of the slab under the increased load. The results of theoretical researches of the calculation of flat reinforced concrete slabs strengthening by external stressed reinforcement in linear and nonlinear formulation of problems are presented, and the results of two calculation variants are compared.
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16

Zhang, Jing Shu, Huan Huan Nie, Yuan Long Yang, and Yuan Yao. "Research and Application of Pre-Stressed Concrete Composite Slabs." Applied Mechanics and Materials 166-169 (May 2012): 131–39. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.131.

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The pre-stressed concrete composite slab, which combines the advantages of cast-in-place slabs and precast slabs, has promising development prospects. In the paper, according to structural integrity, bond performance, sound insulation, thermal preservation and construction techniques, four categories composite slab, such as the composite slab with flat bottom panel (including the composite slab with bar truss reinforced precast concrete bottom panel), the concrete composite slab with precast ribbed panel, the composite slab with hollow bottom panel and the composite slab with sandwich bottom p
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17

Kripak, W., and R. Antonov. "FLAT REINFORCED CONCRETE MULTI VOID SLABS." Building constructions. Theory and Practice, no. 2 (March 30, 2018): 194–201. http://dx.doi.org/10.32347/2522-4182.2.2018.194-201.

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18

Girish, N., and N. Lingeshwaran. "A Comparative Study of Flat Slabs Using Different Shear Reinforcement Parameters." International Journal of Engineering & Technology 7, no. 2.20 (2018): 321. http://dx.doi.org/10.14419/ijet.v7i2.20.16725.

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Punching shear failure is a brittle failure and it is one of the most important types of failure to be considered while designing a reinforced concrete flat slab. This paper aims to study the performance of reinforced concrete flat slabs equipped with different punching shear reinforcement parameters. Three flat slab specimens were cast where two specimens contain punching shear reinforcement in the form of shear stirrups and structural shearbands. The test specimens have length and width of 1000mm and thickness of 185mm for the slabs. The slabs are connected to a column at the center with len
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19

Urban, T., and J. Tarka. "Strengthening of Slab-Column Connections with CFRP Strips / Wzmacnianie Połaczen Płyta-Słup Za Pomoca Tasm CFRP." Archives of Civil Engineering 56, no. 2 (2010): 193–212. http://dx.doi.org/10.2478/v.10169-010-0010-0.

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Abstract The paper describes experimental research of slab-column connections examined on specimen designed as a part of reinforced concrete structure with flat slabs. The aim of the research was to verify the efficiency of slab reinforcement concept against punching shear by increasing slab’s mechanical reinforcement ratio by applying additional external reinforcement in the form of carbon fiber reinforced polymer (CFRP) strips. The capacity enhancement in comparison to unstrengthened slab obtained 36%.
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20

SILVA, A. R., and P. B. SILVA. "Nonlinear numerical analysis of composite slabs with steel decking." Revista IBRACON de Estruturas e Materiais 12, no. 5 (2019): 972–97. http://dx.doi.org/10.1590/s1983-41952019000500002.

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Abstract The composite slabs behavior is governed by longitudinal shear at the interface between the steel deck and concrete, which is developed in slabs under simple bending. The m-k method and the partial connection method, that are used in the evaluation of shear strength at the steel-concrete interface of composite slabs, are based on expensive and long-term experimental tests. The main objective of this work is to implement a finite element model for nonlinear numerical analysis of concrete slabs with steel decking. For this, flat shell elements are implemented, considering Reissner-Mindl
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21

Majtánová, Lucia, and Jaroslav Halvonik. "Numerical Analysis of the Experimental Flat Slabs." Solid State Phenomena 292 (June 2019): 134–39. http://dx.doi.org/10.4028/www.scientific.net/ssp.292.134.

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Reinforced concrete flat slabs are frequently used structural members in building construction. One of the most dangerous form of structural failure of these system is punching of the slab by support. The best way how to verify the reliability of standard model for the assessment of punching capacity is comparison of the resistance obtained from the experiments, with the resistances calculated according to the standard. To determine the reliability of the standards a large database of test results is required, but from economical point of view, it is not possible to prepare so many tests in or
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22

Ozden, Sevket, Ugur Ersoy, and Turan Ozturan. "Punching shear tests of normal- and high-strength concrete flat plates." Canadian Journal of Civil Engineering 33, no. 11 (2006): 1389–400. http://dx.doi.org/10.1139/l06-089.

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Experimental research was conducted to investigate the punching shear performance of flat plates. A large number of slab specimens of normal- and high-strength concrete were tested under concentric and eccentric loads. The effects of flexural reinforcement and the use of steel fiber reinforcement were investigated. Experimental expressions were developed for the computation of residual slab strength. Experimentally observed punching shear capacities were compared with those from the provisions of Canadian Standards Association (CSA) standard CSA-A23.3-04. The results indicate that concrete str
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23

Gołdyn, M., Ł. Krawczyk, W. Ryżyński, and T. Urban. "Experimental Investigations on Punching Shear of Flat Slabs Made from Lightweight Aggregate Concrete." Archives of Civil Engineering 64, no. 4 (2018): 293–306. http://dx.doi.org/10.2478/ace-2018-0058.

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Abstract In the paper the results of experimental investigations concerning flat slabs made from reinforced lightweight concrete with sintered fly ash aggregate CERTYD were presented. In the research program 6 models made in a natural scale were included. The main variable parameter was slab longitudinal reinforcement ratio. The aim of investigation was the experimental verification of efficiency of double-headed studs as punching shear reinforcement. In the existing technical approvals such kind of reinforcement was allowed only in normal concrete slabs. It was demonstrated that double-headed
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24

Paultre, Patrick, and Caroline Moisan. "Distribution of moments in reinforced concrete slabs with continuous drop panels." Canadian Journal of Civil Engineering 29, no. 1 (2002): 119–24. http://dx.doi.org/10.1139/l01-076.

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Slabs with continuous drop panels between column lines facilitate formwork, make long spans possible in addition to increase punching shear resistance around supports and provide unobstructed spans with minimum structural floor depth resulting in lower floor-to-floor heights. The moment distribution in such slabs is different from that in conventional flat plates or slabs with drop panels systems. Dimensioning according to the current provisions in CSA A23.3-94 is problematic because the continuous drop panels are subject to moments exceeding the minimum values allowed by the Code for conventi
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25

Zardi, Muhammad. "PERILAKU PUNCHING SHEAR PADA HUBUNGAN KOLOM BULAT DENGAN FLAT SLAB AKIBAT BEBAN TEKAN AKSIAL." Jurnal Teknik Sipil Unaya 1, no. 1 (2019): 1–14. http://dx.doi.org/10.30601/jtsu.v1i1.1.

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The aim of the tests was to investigate the influence of concrete strength, the eccentricity of the column and the use of shear reinforcement in flat slabs on punching shear. The research specimens are 8 units of flat slabs. Flat slab size 1400 x 1400 mm2 with thickness of 120 mm. Flat slabs were connected with circular column with dimension 225 mm of diameter and 200 mm of height. Flat slabs were made in to 2 variations of concrete strength, e.i. 30 MPa and 60 MPa, 2 variations of shear reinforcement, e.i. without shear reinforcement and with shear reinforcement and 2 variations of eccentrici
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26

Wei, Ya, Francis T. K. Au, Jing Li, and Neil C. M. Tsang. "Experimental and numerical investigation of post-tensioned concrete flat slabs in fire." Journal of Structural Fire Engineering 7, no. 1 (2016): 2–18. http://dx.doi.org/10.1108/jsfe-03-2016-001.

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Purpose This paper aims to understand the structural fire performance of two-way post-tensioned flat slabs, particularly their deformations and load-carrying mechanisms in fire, and to explore the behaviour of post-tensioned high-strength self-compacting concrete flat slabs with unbonded tendons in fire. Design/methodology/approach Four tests of post-tensioned high-strength self-compacting concrete flat slabs were conducted under fire conditions. Numerical modelling using the commercial package ABAQUS was conducted to help interpret the test results. Findings Two of the specimens with lower mo
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27

Megally, Sami, and Amin Ghali. "Seismic behavior of slab-column connections." Canadian Journal of Civil Engineering 27, no. 1 (2000): 84–100. http://dx.doi.org/10.1139/l99-052.

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Brittle punching failure of flat plates can occur as a result of transfer of shearing forces and unbalanced moments between slabs and columns. During an earthquake, the unbalanced moments transferred between slabs and columns can produce significant shear stresses that increase the likelihood of brittle failure. This brittle punching failure mode must be avoided for seismic-resistant flat plate structures. The most common punching strengthening methods are provision of the slab-column connections with drop panels or shear reinforcement or use of high strength concrete in the slab at the vicini
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28

Fillo, Ľudovít, Tomáš Augustín, Ján Hanzel, and Veronika Knapcová. "Punching Resistance of Flat Slabs." Applied Mechanics and Materials 821 (January 2016): 761–66. http://dx.doi.org/10.4028/www.scientific.net/amm.821.761.

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Results of the latest experiments have revealed that the maximum punching resistance defined from crushing of concrete struts at the perimeter of a column in EC2 is an insufficient criterion for limitation of maximum shear forces at the vicinity of the columns. Therefore further limitation has been introduced in TC 250 SC2 and also included in NA of Eurocodes.
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Majtánová, Lucia, Jaroslav Halvonik, and Ján Hanzel. "The Maximum Punching Capacity of Flat Slabs." Solid State Phenomena 259 (May 2017): 232–37. http://dx.doi.org/10.4028/www.scientific.net/ssp.259.232.

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Two ways how to determine maximum punching resistance of flat slabs with shear reinforcement are currently used. The first way is verification of the concrete strut capacity at the column periphery defined as VRd,max. The second limit is defined as kmax multiple of the punching shear resistance without shear reinforcement VRd,c. The values of kmax are proposed usually in between 1.4 and 2.0. Results of the experimental tests are presented in the paper that were focused on above mentioned limits, whether failure of the struts can precede any other form of punching failure that is limited by kma
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30

Istomin, Andrey, and Maksim Kudryavtsev. "Strength of cast-in-place slabs for rectangular cross-section columns punching." E3S Web of Conferences 263 (2021): 02035. http://dx.doi.org/10.1051/e3sconf/202126302035.

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Flat slabs in contemporary buildings are most commonly supported by rectangular cross-section columns. Research of slabs supported by rectangular cross-section columns for punching is rather narrow. The purpose of this work was the experimental research of slabs punching by rectangular cross-section columns and adjustment of their design method. Reinforced concrete slabs 6 cm in thickness without transverse reinforcement were used as testing specimens. During tests load on the slab was transferred using stamps. Side ratios for stamps varied from 1 to 5 in experiments. Strength and strain prope
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31

Marzouk, H., and A. Hussein. "Punching shear analysis of reinforced high-strength concrete slabs." Canadian Journal of Civil Engineering 18, no. 6 (1991): 954–63. http://dx.doi.org/10.1139/l91-118.

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An experimental investigation was conducted at the structural laboratory at Memorial University of Newfoundland to examine the behaviour of high-strength concrete two-way slabs. It was evident that a new mechanical model is required to predict the punching shear capacity of such slabs. The experimental results of the tested slabs with regard to deformations, strains, ultimate capacity, and modes of failure were examined. Based on the test results, a mechanical model was adopted and developed for high-strength concrete slab applications. The formulation takes into account the actual behaviour o
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32

Ferreira, Gabriel S., Tulio O. Guedes, Lucas F. Melo, Márcio S. Gonçalves, and Roberto Pimentel. "Damage assessment of reinforced concrete flat slabs through modal tests using impact excitation." International Journal of Structural Integrity 10, no. 2 (2019): 265–75. http://dx.doi.org/10.1108/ijsi-08-2018-0049.

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Purpose In reinforced concrete (RC) structures, an evidence of damage is the presence of cracking. In order to evaluate the effect of damage on cracking pattern and natural frequency in RC slabs, two of such structures with different dimensions and reinforcement ratios were tested, in which cracks were induced through application of static load, followed by modal tests using impact excitation. The paper aims to discuss this issue. Design/methodology/approach The gradient of the fundamental natural frequency along the decay, the crack opening rate and also a global damage index based on changes
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33

Zhang, Li, Ya Wei, Francis Tat Kwong Au, and Jing Li. "Experimental study of two-way post-tensioned flat slabs in fire." Journal of Structural Fire Engineering 9, no. 3 (2018): 237–51. http://dx.doi.org/10.1108/jsfe-01-2017-0016.

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Purpose This study aims to investigate the influence of tendon layout, pre-stressing force, bond condition and concrete spalling on the structural behaviour of two-way post-tensioned flat slabs at elevated temperatures. Design/methodology/approach Fire tests of four scale specimens of two-way post-tensioned concrete flat slabs were performed and analysed. Three of them were provided with bonded tendons, while the other was unbonded for comparison. The fabrication of specimens, phenomena observed during testing, temperature distributions, deflections and occurrence of concrete spalling were exa
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34

El-Salakawy, Ehab F., Maria Anna Polak, and Monir H. Soliman. "Reinforced concrete slab-column edge connections with shear studs." Canadian Journal of Civil Engineering 27, no. 2 (2000): 338–48. http://dx.doi.org/10.1139/l99-062.

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The paper reports the results of an experimental investigation on the influence of shear studs on the behaviour of reinforced concrete slab-column edge connections with openings. The test parameters were the location of openings around the column, the size of openings, and the existence of shear reinforcement. The objective of the paper is to present and discuss the results of large-scale tests on slabs with shear stud reinforcement and compare these test results with those of tests on identical slabs but without shear reinforcement. All tested slabs contained same amounts of typical flexural
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35

Tur, Andrei V. "Large-Size Jointless Concrete Slab-on-Grade with Combined Prestressing." Solid State Phenomena 309 (August 2020): 201–7. http://dx.doi.org/10.4028/www.scientific.net/ssp.309.201.

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In the international and national practice of design, a different type of slab on the various types of grade are becoming increasingly common. For such structural elements, shrinkage and temperature influences in combination with low tensile stress, mainly in early age, leads to the risk of cracking in reinforced concrete structures, and as result, a reduction of its durability. The present article describes some of the possible ways of usage of the post-tensioned flat slabs and the rational design procedures to provide their structural reliability. The theoretical background of the punching r
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36

Augustín, Tomáš, Ľudovít Fillo, Jaroslav Halvonik, and Marián Marčiš. "Punching Resistance of Flat Slabs with Openings – Experimental Investigation." Solid State Phenomena 272 (February 2018): 41–46. http://dx.doi.org/10.4028/www.scientific.net/ssp.272.41.

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Flat slabs are commonly used structures in contemporary architecture. Although their common use there is still problem in design of these structures. The openings adjacent to a column are often used for plumbing and such a position of the openings increases shear stresses in the flat slab near the column. This paper deals with experimental work focused on the punching shear resistance of the flat slab specimens with openings adjacent to column compared to the flat slab specimens without openings. The opening influence is determined experimentally and by using models for the assessment of punch
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37

Fillo, Ľudovít, Jana Labudková, and Ján Hanzel. "Design of Flat Slabs Height." Advanced Materials Research 1106 (June 2015): 221–24. http://dx.doi.org/10.4028/www.scientific.net/amr.1106.221.

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Results of latest experiments have revealed that the maximum punching resistance defined from crushing of concrete struts at the perimeter of a column is an insufficient criterion for limitation of maximum shear forces at the vicinity of the columns. Therefore further limitation has been recommended by CEN TC250 SC2 and introduced in STN EN 1992-1-1/NA [1]. The paper will deal with the new requirements concerning the maximum punching shear resistance, based on the kmax factor and design of min flat slabs height.
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Filatov, Valery. "Evaluation of punching shear strength of flat slabs supported on rectangular columns." E3S Web of Conferences 33 (2018): 02007. http://dx.doi.org/10.1051/e3sconf/20183302007.

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The article presents the methodology and results of an analytical study of structural parameters influence on the value of punching force for the joint of columns and flat reinforced concrete slab. This design solution is typical for monolithic reinforced concrete girderless frames, which have a wide application in the construction of high-rise buildings. As the results of earlier studies show the punching shear strength of slabs at rectangular columns can be lower than at square columns with a similar length of the control perimeter. The influence of two structural parameters on the punching
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Alekhin, Vladimir, Alexander Budarin, Maxim Pletnev, and Liubov Avdonina. "Investigation of longitudinal reinforcement contribution in shear punching of reinforced concrete flat slabs without transverse reinforcement." MATEC Web of Conferences 279 (2019): 02005. http://dx.doi.org/10.1051/matecconf/201927902005.

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The shear punching of the reinforced concrete slabs is a complex process occurring when considerable force is concentrated on the relatively small area of a column-slab connection. An incorrect assessment of load capacity of slab under the punching shear may lead to an accident. One of the most significant factors affecting the slab capacity is longitudinal reinforcement. In this article much attention is given to the analysis of the longitudinal rebar impact on the maximum loading capacity of reinforced concrete slabs without transverse reinforcement affected by punching shear force using the
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40

Padhiar, Kamal, Dr C. D. Modhera, Dr A. K. Desai, and Dr S. A. Vasanwala. "Effect of load balancing on punching shear stress and deflection of post tensioning flat slab with different grade of concrete." International Journal of Engineering & Technology 7, no. 3.29 (2018): 157. http://dx.doi.org/10.14419/ijet.v7i3.29.18548.

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Flat slabs are a widely adopted solution now a day for buildings, because of their economic and functional advantages. The main objective of this paper is to analysis of post tensioning flat slab by changing the different parameter such as span of slab, grade of concrete and load balancing and comparing the result such as deflection and punching shear. Grade of concrete and load balance directly influence to the deflection and punching shear of flat slab. So in this paper concrete grade varies M-35 to M-50 is considered and load balance varies from minimum 25% to maximum 100% is considered. Th
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Vinh, Tran Xuan, Nguyen Trung Hieu, Pham Xuan Dat, and Nguyen Manh Hung. "Evaluation of punching shear capacity of two-way RC slabs without transverse reinforcement according to different provisions." Journal of Science and Technology in Civil Engineering (STCE) - NUCE 15, no. 3 (2021): 171–84. http://dx.doi.org/10.31814/stce.nuce2021-15(3)-14.

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Currently, RC flat slabs are being used commonly because of their advantages. Punching shear failure is one of the governing failure modes of RC flat slabs without column capital and drop panels. In this paper, the provisions for predicting the punching shear capacity of two-way reinforced concrete (RC) flat slabs without shear reinforcement including ACI 318-19, Eurocode 2 and TCVN 5574:2018 provisions are reviewed by mean of considering the influences of the main parameters (effective depth, compressive strength of concrete, loaded area, reinforcement ratio). A total of 169 test results coll
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Jahami, Ali, Yehya Temsah, Ossama Baalbaki, et al. "Effect of Successive Impact Loads From a Drop Weight on a Reinforced Concrete Flat Slab." MATEC Web of Conferences 281 (2019): 02003. http://dx.doi.org/10.1051/matecconf/201928102003.

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Lebanon is one of the countries which are at high risk of experiencing rock falls. In order to ensure public safety, engineers must take into consideration this risk. In the past years, numerous researches were conducted on the behavior of horizontal structural elements, slabs, of different types under dynamic impact load. Reinforced concrete flat slabs are commonly used slabs in residential buildings. To build a profound understanding of the structural behavior of the slabs under such loadings, it is important to investigate the effect of energy dissipation on the equivalent impact force, mid
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Gołdyn, M., and T. Urban. "Hidden Capital as an Alternative Method for Increasing Punching Shear Resistance of LWAC Flat Slabs." Archives of Civil Engineering 65, no. 4 (2019): 309–28. http://dx.doi.org/10.2478/ace-2019-0062.

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AbstractIn the paper an alternative method for increasing punching shear resistance of the flat slabs from lightweight aggregate concrete by means of hidden steel fibre reinforced capital was presented. Previous experimental studies demonstrated that the addition of steel fibres to concrete allows for increase in the punching shear resistance of flat slab. Steel fibres modify the tensile strength of concrete, which translates into increased ductility of the material. The results of the experimental investigations were presented, the aim of which was to assess the effectiveness of the proposed
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44

Guan, Hong, and Yew-Chaye Loo. "Failure analysis of column–slab connections with stud shear reinforcement." Canadian Journal of Civil Engineering 30, no. 5 (2003): 934–44. http://dx.doi.org/10.1139/l03-058.

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The design of a flat plate structure is generally governed either by serviceability limits on deflection or punching shear strength of the column–slab connections. To increase the strength of a column–slab connection, a new type of shear reinforcement, referred to as shear stud, is gaining popularity in practice. In this paper, a nonlinear layered finite element method (LFEM) is used to investigate the effectiveness of the shear studs in increasing the punching shear strength of edge and corner column–slab connections. In total, nine large-scale reinforced concrete slabs of a flat plate floor
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45

Salman, Donia, Rabab Allouzi, and Nasim Shatarat. "Punching shear behaviour of flat slabs with different reinforcement schemes: openings and rectangularity effects." International Journal of Structural Integrity 12, no. 4 (2021): 589–612. http://dx.doi.org/10.1108/ijsi-08-2020-0079.

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PurposeThe main goal is to investigate the effect of size and location of opening and column size on the punching shear strength. Openings are often needed in order to install mechanical and electrical services. This process takes away part of the concrete volume which is responsible for resisting the shear forces and any unbalanced moment. Furthermore, the application of rectangular columns in flat slabs is commonly used in practice as they provide lateral stiffness to the building. They are also utilised in garages and multi-storey buildings where these elongated cross-sectional columns redu
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Vollum, R. L. "Multipliers for deflections in reinforced concrete flat slabs." Magazine of Concrete Research 55, no. 2 (2003): 95–104. http://dx.doi.org/10.1680/macr.2003.55.2.95.

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

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Ilshat, Mirsayapov, Nikitin Georgy, and Khanbekov Midkhat. "Strength of reinforced concrete flat slabs for punching." IOP Conference Series: Materials Science and Engineering 890 (August 13, 2020): 012076. http://dx.doi.org/10.1088/1757-899x/890/1/012076.

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Smolyago, G. A., S. V. Drokin, A. V. Dronov, et al. "RECONSTRUCTION OF PRECAST REINFORCED CONCRETE FLAT FLOOR SLABS." Building and reconstruction 82, no. 2 (2019): 116–22. http://dx.doi.org/10.33979/2073-7416-2019-82-2-116-122.

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Pilakoutas, K., and X. Li. "Alternative Shear Reinforcement for Reinforced Concrete Flat Slabs." Journal of Structural Engineering 129, no. 9 (2003): 1164–72. http://dx.doi.org/10.1061/(asce)0733-9445(2003)129:9(1164).

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