Relevant bibliographies by topics / Concrete flat slabs

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Academic literature on the topic 'Concrete flat slabs'

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

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Journal articles on the topic "Concrete flat slabs"

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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 (December 29, 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 hybrid flat slabs of two layer of concrete with different thicknesses. Concrete mixture HSC was used in tension zone in three hybrid flat slabs (second group) with three thicknesses (30, 60 and 90 mm), while the remaining three hybrid flat slabs (third group) was used the HSC in compression zone with the same previous thicknesses. The experimental results shown that the ultimate load increased about (19.4%) when HSC was used fully (hH / h = 1) instead of using NSC in the control flat slab (NSC slab). The hybrid flat slabs with use HSC in compression zone showed higher in cracking and ultimate flexural loads compared with those of the hybrid flat slabs with use HSC in tension zone and also were stiffer in load-defl ection curve with the hybrid flat slabs with HSC in tension zone, also the hybrid flat slabs showed an improvement in the cracking load and ultimate flexural load when increasing the thickness of the HSC layer (hH / h) in both tension and compression zone as compared to control flat slab (NSC slab).
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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 (April 1, 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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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 (December 1, 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 studies on the punching shear behavior of concrete flat slabs in ambient conditions, available in the literature. Based on these studies, it is found that punching shear capacity in ambient condition is affected by many factors, which may not remain constant during a fire exposure. Only a limited number of studies on concrete flat slabs for punching shear failure in fire are available. This paper reviews the available experimental and analytical studies, standards and codes to address the research gap in estimating of punching shear strength of concrete flat slab-column connections without shear reinforcement.
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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 (June 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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Sherif, Alaa G., and Walter H. Dilger. "Analysis and deflections of reinforced concrete flat slabs." Canadian Journal of Civil Engineering 25, no. 3 (June 1, 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 concrete flexural members, three methods are investigated: the effective moment of inertia approach, the mean curvature approach, and the bilinear method given in the CEB manual for deflections. To calculate the deflections of flat slabs as column and field strip deflections, new coefficients for distributing the bending moments between the column and middle strips are proposed.Key words: analysis, deflection, flat concrete slab, test.
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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 (October 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, depending on the type of the concrete used (with or without steel fibers). The steel fiber volume used in the slabs of second group was of 0.9%. Each group was composed of four slabs: one without shear reinforcement and three with shear reinforcement (studs) distributed radially around the column. The use of steel fibers increased the ultimate strength of all flat slabs. In one of the slabs, the association of steel fibers with shear reinforcement changed the failure surface from outside to inside the punching shear reinforcement region.
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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 (August 1, 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 times of the effective depth (1.5d) at the center of the slab, once at all the thickness of cross section of the slab and the others at half thickness either tension or compression face of the slabs all cases cast with two types of fiber. The vertical load was applied upward through a square column with a dimension of (100 mm). In all slabs, no failure in mortar infiltrated fiber concrete was observed. The test results showed that the use of mortar infiltrated fiber concrete improves the punching shear strength for some cases according to the type of fibers and the location of casting mortar infiltrated fiber concrete in slabs. The enhancement in punching shear strength due to using mortar infiltrated fiber concrete at 1.5d square shape (265 mm) ranged from 4% to 46% compared with the control specimens.
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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 (October 1, 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 concrete mixes (with a volumetric ratio of fiber 6%), and the age of test was 28 days. After studying the behavior of these mixes in these tests, the second stage of this study was concluded casting reference slab with dimensions 900×900×80 mm from normal strength concrete and repairing two sets of damaged slabs (with dimensions 900×900×50 mm, the first set consist of five slabs damaged in the compression zone, and the second set consist of five slabs damaged in tension zone), the two sets repaired with repair layer from mortar infiltrated fiber concrete with thickness 30 mm. The third stage of the study was testing the effect of the repair material (mortar infiltrated fiber concrete) on the flexural behavior of the repaired slab specimens in (flexural strength, deflection characteristics, and ductility), through using a hydraulic jack with a four-point load system. The results of testing slab specimens indicated significant improvement in the flexural behavior of the repaired slab when compared with the reference slab, the slabs repaired in the compression zone recorded increasing in range 2-39% in ultimate load and the slabs that repaired in tension zone recorded 4-71% increasing in ultimate load .also recorded better deflection values through testing the slabs specimens that repaired. The ductility of the repaired slab specimens increased significantly from 25 to 91% compared with the reference slab specimens. These results indicated excellent effect mortar infiltrated fiber concrete as a perfect repair material for slabs that damaged in compression and tension zones.
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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 (January 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-column connections of concrete flat plates. To verify the accuracy and reliability of the proposed method of analysis, comparative studies are carried out on a collection of reinforced concrete slabs, single slab-column connections and multi-column flat plates which were tested by other researchers. In general, good correlations are obtained with the published test results.
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Simmonds, Sidney H., and Brian W. Doblanko. "Shear-moment transfer in flat plates." Canadian Journal of Civil Engineering 13, no. 3 (June 1, 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 in the design of slabs. The use of the charts is illustrated by examples. Key words: design, flat plate, moment transfer, reinforced concrete, shear, slabs.
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Dissertations / Theses on the topic "Concrete flat slabs"

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Eigelaar, Estee M. "Deflections of reinforced concrete flat slabs." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/2389.

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Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2010.
ENGLISH SUMMARY: It is found that the serviceability limit state often governs the design of slender reinforced concrete members. Slender flexural members often have a percentage tension reinforcement less than 1.0% and an applied bending moment just above the point of first cracking. For such members, the available methods to evaluate the serviceability conditions produce inadequate and unrealistic results. The evaluation of the serviceability of a slender member includes the calculation of the predicted deflection, either by empirical hand-calculation or analysing a finite element model, and the verification using the span-to-effective-depth ratio. The focus of the study is on flat slab structures. It investigates the different deflection prediction methods and the span-to-effective-depth ratio verifications from various design standards. These design standards include the ACI 318 (2002), the SABS 0100-1 (2000), the EC2 (2004) and the BS 8110 (1997). The background to the methods, as well as the parameters which influences the deflection development for lightly reinforced members, are investigated in order to define the limitations of the methods. As a result of the investigation of the deflection calculation methods, an Alternative Approach is suggested and included in the comparisons of the various methods. The deflection prediction methods and the span/effective depth verification procedures are accurately formulated to predict the serviceability behaviour of beams. Additional approaches had to be used to apply these methods to a two-dimensional plane such as that of a flat slab structure. The different deflection prediction methods and the span/effective depth verification methods are calculated and compared to the recorded data of seven experimental flat slab specimens as performed by others. A study by Gilbert and Guo (2005) accurately recorded the flexural behaviour of flat slab specimens under uniformly distributed loads for test periods up to 750 days. The methods to evaluate the serviceability of a slender member were also applied to slab examples designed using South African standards. The study concludes by suggesting a suitable deflection prediction method for different parameter (limitation) categories with which a slender member can comply to. The typical span/effective depth ratio trend is also presented as the percentage tension reinforcement for a slender member changes. It is observed that the empirical hand-calculation methods present more reliable results than those of the finite element models. The empirical hand-calculation methods are accurate depending on the precision to which the slab was constructed relative to the actual slab design. The comparison of the deflection methods with South African case studies identified the role played by construction procedures, material parameters and loading history on slab behaviour.
AFRIKAANSE OPSOMMING: Die diensbaarheidstoestand is in baie gevalle die bepalende faktor vir die ontwerp van slank gewapende beton elemente bepaal. Slank elemente, soos lig bewapende buigbare beton elemente, het gewoonlik ‘n persentasie trekbewapening van minder as 1.0% en ‘n aangewende buigmoment net wat net groter is as die punt waar kraking voorkom. Die metodes beskikbaar om die diensbaarheid van sulke elemente te evalueer gee onvoldoende en onrealistiese resultate. Die evaluering van die elemente in die diensbaarheidstoestand sluit in die bepaling van defleksies deur berekening of die analise van ‘n eindige element model, en die gebruik van die span/effektiewe diepte metode. Die fokus van die studie is platbladstrukture. Die doel van die studie is om die verskillende metodes vir die bereking van defleksie asook die verifikasie volgens span/effektiewe diepte metodes van die verskillende ontwerp standaarde te ondersoek. Die ontwerp standaarde sluit die ACI 318 (2002), SABS 0100-1 (2000), EC2 (2004) en die BS 8110 (1997) in. Die agtergrond van hierdie metodes is ondersoek asook die parameters wat ‘n rol speel, sodat die beperkings van die metodes geidentifiseer kan word. As ‘n gevolg van die ondersoek na die beperkings van die metodes, is ‘n Alternatiewe Benadering voorgestel. Die Alternatiewe Benadering is saam met die metodes van die ontwerpstandaarde gebruik om die verskille tussen die metodes te evalueer. Die defleksievoorspelling en die span/effektiewe diepte verifikasie metodes is korrek geformuleer om die diensbaarheid van balke te evalueer. Ander benaderings was nodig om die diensbaarheid van blad blaaie te toets. Die onderskeie defleksievoorspelling en span/effektiewe diepte metodes is bereken vir sewe eksperimentele plat blaaie soos uitgevoer deur ander navorsers. Gilbert and Guo (2005) het ‘n studie uitgevoer waar die buigingsgedrag van die sewe plat blaaie, met ‘n uniforme verspreide las vir ‘n toetsperiode van tot 750 dae, akkuraat genoteer is. Die metodes om die diensbaarheid van ‘n slank element te toets, was ook op Suid-Afrikaanse blad voorbeelde getoets. Dit was gedoen om die Suid- Afrikaanse ontwerp van ligte bewapende beton elemente te evalueer. Die gevolgetrekkings stel ‘n gepaste defleksie metode vir ‘n slank element vir verskillende beperking kategorië voor. Dit is ook verduidelik hoe die tipiese span/effektiewe diepte verhouding met die persentasie trek bewapening vir ‘n slank element verander. Dit is bevind dat die imperiese handmetodes om defleksies te bereken, meer betroubaar as die eindige element modelle se resultate is. Die imperiese handberekening metodes is akkuraat relatief tot hoe akkuraat die blad konstruksie tot die blad ontwerp voltooi is. ‘n Vergelyking van defleksieberekening met Suid-Afrikaanse gevallestudies het die belangrikheid van konstruksieprosedures, materiallparamteres and belastingsgeskiedenis geïdentifiseer.
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Al-Tamimi, Adnan. "Fibre-reinforced connections in precast concrete flat slabs." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367112.

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Trygstad, Steinar. "Structural Behaviour of Post Tensioned Concrete Structures : Flat Slab. Slabs on Ground." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, 2001. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-114.

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In this investigation strength and structural behaviour of prestressed concrete is studied with one full scale test of one flat slab, 16000 mm x 19000 mm, and three slabs on ground each 4000 mm x 4000 mm with thickness 150 mm. The flat slab was constructed and tested in Aalesund. This slab has nine circular columns as support, each with diameter 450 mm. Thickness of this test slab was 230 mm and there were two spans in each direction, 2 x 9000 mm in x-direction and 2 x 7500 mm in y-direction from centre to centre column. The slab was reinforced with twenty tendons in the middle column strip in y-direction and eight tendons in both outer column strips. In x-direction tendons were distributed with 340 mm distance. There were also ordinary reinforcement bars in the slab. Strain gauges were welded to this reinforcement, which together with the deflection measurements gives a good indication of deformation and strains in the structure.

At a live load of 6.5 kN/m2 shear failure around the central column occurred: The shear capacity calculated after NS 3473 and EuroCode2 was passed with 58 and 69 %, respectively. Time dependent and non-linear FE analyses were performed with the program system DIANA. Although calculated and measured results partly agree well, the test show that this type of structure is complicated to analyse by non-linear FEM.

Prestressed slabs on ground have no tradition in Norway. In this test one reinforced and two prestressed slabs on ground were tested and compared to give a basis for a better solution for slabs on ground. This test was done in the laboratory at Norwegian University of Science and Technology in Trondheim. The first slab is reinforced with 8 mm bars in both directions distributed at a distance of 150 mm in top and bottom. Slab two and three are prestressed with 100 mm2 tendons located in the middle of slab thickness, and distributed at a distance of 630 mm in slab two and 930 mm in slab three. Strain gauges were glued to the reinforcement in slab one and at top and bottom surface of all three slabs. In slab two and three there were four load cells on the tendons.

Each slab were loaded with three different load cases, in the centre of slab, at the edge and finally in the corner. This test shows that stiffness of sub-base is one of the most important parameters when calculating slabs on ground. Deflection and crack load level depends of this parameter. Since the finish of slabs on ground is important, it can be more interesting to find the load level when cracks start, than deflection for the slab. It is shown in this test that crack load level was higher in prestressed slabs than in reinforced slab. There was no crack in the top surface with load in the centre, but strain gauges in the bottom surface indicate that crack starts at a load of 28 kN in the reinforced slab, and 45 kN in the prestressed slabs. Load at the edge give a crack load of 30 kN in reinforced slab, 45 kN and 60 kN in prestressed slabs. The last load case gives crack load of 30 kN in reinforced slab, 107 kN and 75 kN in prestressed slabs. As for the flat slab, FE analyses were performed for all of the three slabs on ground, and analyses shows that a good understanding of parameters like stiffness of sub-base and tension softening model, is needed for correct result of the analyses.

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Melo, Guilherme Sales S. de A. "Behaviour of reinforced concrete flat slabs after local failure." Thesis, University of Westminster, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304732.

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Samadian, Fariborz. "Investigation of shear reinforcement for reinforced concrete flat slabs." Thesis, University of Westminster, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362692.

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Cloete, Renier. "A simplified finite element model for time-dependent deflections of flat slabs." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-05302005-123208/.

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Gomes, Ronaldo Barros. "Punching resistance of reinforced concrete flat slabs with shear reinforcement." Thesis, University of Westminster, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303158.

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Smith, Holly Kate Mcleod. "Punching shear of flat reinforced-concrete slabs under fire conditions." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/20962.

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This thesis examines punching shear response of reinforced-concrete flat slabs under fire conditions. The shear behaviour of concrete in fire is relatively poorly understood compared to its flexural response. Failures such as the Gretzenbach car park failure in Switzerland (2004) have prompted concerns over the punching shear capacity of flat slabs in fire. The shear behaviour of reinforced-concrete in fire depends on degradation of the individual material properties with temperature, their interaction, and more recently recognised, the effects of restrained thermal expansion. Through experimental testing this thesis aims to build a foundation understanding of the punching shear behaviour of flat reinforced-concrete slabs in fire conditions. A series of shear blocks, tested after exposure to elevated temperature (realistic fire temperature), were used to develop an understanding of the effects of elevated temperature on the shear transfer performance of reinforced-concrete. These tests allowed the complex interplay of shear-carrying mechanisms at ambient temperature to be extended to the case of post-elevated temperature. Fifteen slab-column punching shear specimens were tested under both applied load and extreme heating. In particular, the effects of restrained thermal expansion were experimentally investigated by altering the support conditions of the slab-column specimens. A purpose-built restraint frame allowed the boundary support conditions to be either fully restrained or unrestrained. This experimental series is the only series to have tested restrained specimens at elevated temperatures, though previous researchers have simulated the thermal restraint effects and reported the importance of restrained thermal expansion and curvature on the behaviour of punching shear. Parameters of slab thickness and reinforcement ratio were also varied to investigate their respective impacts on punching shear behaviour at elevated temperature. The thicker 100 mm reinforced slabs failed in punching shear, whereas the 50 mm and 75 mm thick slabs failed in flexure-shear mechanisms and the unreinforced slabs failed in flexure. Clear behavioural differences were observed between specimens with different support conditions. Unrestrained 100 mm thick slabs under sustained load failed soon after heating began, whereas none of the corresponding restrained specimens failed during heating. One restrained, heavily reinforced specimen failed during cooling, whilst under sustained load. This is the first recorded punching shear failure during the cooling phase of an elevated temperature test and may also be the first recorded test specimen ever to have failed during the cooling phase of an elevated temperature test. This failure highlights the unknown and potentially unsafe behaviour of structures during the cooling phase. Further structural investigation of the cooling behaviour of concrete flat slabs after exposure to fire, needs to be undertaken. Most of the specimens’ central deflection was away from the heat source (in the direction of loading) during the whole test, irrespective of support condition. The test setup was assessed to investigate the unusual slab-column deflection away from the heat source, however the complex behaviour observed during the tests cannot currently be explained. It is assumed that the degradation in concrete properties and non-linear material behaviour dominates over the thermal expansion of the slabs. Quantitative and qualitative comparisons are presented, though the quantitative data is impacted by size effect, non-repeatable heating application between tests and jack friction influences on specimens with low capacities. Eurocode 2 punching shear prescriptive elevated temperature design, extends the ambient temperature equation for elevated temperature use, by degrading the temperature-dependant parameters by factors. Support conditions are not considered, with the code specifically telling the designer not to consider in-plane thermal expansion effects, therefore consequently ignoring the premature punching shear failure that can occur. Furthermore, the ambient temperature equation is based on the regression of available experimental data at the time and does not consider the reinforcement as a shear transfer mechanism. The experimental capacities of the 100 mm thick, reinforced slabs that failed in pure punching shear mechanism were similar to the Eurocode 2 punching shear prescriptive design capacity, when directly compared. The unrestrained support condition was shown to be consistently, not conservatively predicted by Eurocode 2, whereas the restrained support condition capacities were conservatively predicted. It is comforting to know that the Eurocode 2 design predicts the restrained supported slabs conservatively, as real buildings are more likely to have supports closer to the restrained condition rather than the unrestrained support condition. A sensitivity analysis of the Eurocode 2 prescriptive design equation shows it is highly sensitive to the concrete strength degradation and not the variable, cp, which was used to make a support condition comparison in this thesis. This indicates how the Eurocode 2 equation for punching shear capacity lacks in its consideration of whole structural behaviour. The Critical Shear Crack Theory has been proposed as the background to a harmonised shear design approach, called Model Code 2010. The Critical Shear Crack Theory was safe in predicting the experimental punching shear capacities. There were large variances for the 100 mm thick slabs, however they are consistent with the original model comparison to test data. An expansion of the Critical Shear Crack Theory for elevated temperature requires further validation with experimental restrained thermal expansion tests, such as those presented in this thesis. Finally, a digital image correlation technique has been proven to be a reliable method to measure structural displacements of concrete at elevated temperatures. Digital image correlation allowed the crack locations and slab rotation angles to be visualized throughout testing. No other measurement techniques are able to provide similar versatility in fire testing such as that presented herein.
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Kamaraldin, Khaled. "Punching shear and moment transfer in reinforced concrete flat slabs." Thesis, University of Westminster, 1990. https://westminsterresearch.westminster.ac.uk/item/94vwq/punching-shear-and-moment-transfer-in-reinforced-concrete-flat-slabs.

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Michels, Julien [Verfasser]. "Bearing Capacity of Steel Fiber Reinforced Concrete Flat Slabs / Julien Michels." Aachen : Shaker, 2010. http://d-nb.info/1104047403/34.

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Books on the topic "Concrete flat slabs"

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Whittle, Robin. Design of Reinforced Concrete Flat Slabs. Construction Industry Research and Information Ass, 1994.

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Flat slabs for efficient concrete construction. Crowthorne, Berkshire: British Cement Association, 2001.

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Association, British Cement, and European Concrete Building Project, eds. Prefabricated punching shear reinforcement for reinforced concrete flat slabs. Crowthorne, Berkshire: British Cement Association, 2001.

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4

Early striking and improved backpropping for efficient flat slab construction. Crowthorne, Berkshire: British Cement Association, 2001.

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Association, Construction Industry Research and Information, and Robin Whittle. Design of Reinforced Concrete Flat Slabs to B.S.8110 (Report). Construction Industry Research and Information Ass, 1985.

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Book chapters on the topic "Concrete flat slabs"

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Chidiac, S. E., M. S. Cheung, and N. P. Mailvaganam. "Service Life of Patches in Concrete Flat Slabs." In Trends in Structural Mechanics, 299–308. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5476-5_29.

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Setiawan, Andri, Robert Vollum, and Lorenzo Macorini. "Nonlinear Finite Element Analysis of Reinforced Concrete Flat Slabs Subjected to Reversed-Cyclic Loading." In High Tech Concrete: Where Technology and Engineering Meet, 814–22. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_95.

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Bompa, Dan V., and Ahmed Y. Elghazouli. "Punching Shear Strength of RC Flat Slabs Provided with Shear-Heads at Interior Connections to Steel Columns." In High Tech Concrete: Where Technology and Engineering Meet, 823–31. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_96.

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Nogales, Alejandro, and Albert de la Fuente. "Elevated Flat Slab of Fibre Reinforced Concrete Non-linear Simulation up to Failure." In RILEM Bookseries, 666–77. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83719-8_57.

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Aidarov, Stanislav, Francisco Mena, and Albert de la Fuente. "Self-compacting Steel Fibre Reinforced Concrete: Material Characterization and Real Scale Test up to Failure of a Pile Supported Flat Slab." In RILEM Bookseries, 702–13. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83719-8_60.

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Reynolds, Charles E., and James C. Steedman. "Flat slabs." In Examples of the Design of Reinforced Concrete Buildings to BS8110, 85–94. CRC Press, 2017. http://dx.doi.org/10.1201/9781315273440-12.

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Sagaseta, Juan, Nsikak Ulaeto, and Justin Russell. "Structural robustness of concrete flat slab structures." In fib Bulletin 81. Punching shear of structural concrete slabs: Honoring Neil M. Hawkins, 273–98. fib. The International Federation for Structural Concrete, 2017. http://dx.doi.org/10.35789/fib.bull.0081.ch14.

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Gayed, Ramez B., Chandana Peiris, and Amin Ghali. "Flexure-induced punching of concrete flat plates." In fib Bulletin 81. Punching shear of structural concrete slabs: Honoring Neil M. Hawkins, 73–100. fib. The International Federation for Structural Concrete, 2017. http://dx.doi.org/10.35789/fib.bull.0081.ch05.

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Ramos, António, Rui Marreiros, André Almeida, Brisid Isufi, and Micael Inácio. "Punching of flat slabs under reversed horizontal cyclic loading." In fib Bulletin 81. Punching shear of structural concrete slabs: Honoring Neil M. Hawkins, 253–72. fib. The International Federation for Structural Concrete, 2017. http://dx.doi.org/10.35789/fib.bull.0081.ch13.

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Genikomsou, Aikaterini S., and Maria A. Polak. "3-D finite element analysis of punching shear of RC flat slabs using ABAQUS." In fib Bulletin 81. Punching shear of structural concrete slabs: Honoring Neil M. Hawkins, 101–16. fib. The International Federation for Structural Concrete, 2017. http://dx.doi.org/10.35789/fib.bull.0081.ch06.

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Conference papers on the topic "Concrete flat slabs"

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Paret, T. F., G. R. Searer, O. A. Rosenboom, and K. P. Pandya. "Radial Cracking in Reinforced Concrete Flat Plate Slabs." In Structures Congress 2010. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41130(369)178.

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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. Singapore: Research Publishing Services, 2013. http://dx.doi.org/10.3850/978-981-07-5354-2_st-132-408.

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Friedrich, Thomas, Juergen Schnell, and Wolfgang Kurz. "Case Study: Composite Construction for FLAT Slabs with Integrated Building Services." In International Conference on Composite Construction in Steel and Concrete 2013. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784479735.024.

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Piel, Wolfgang, and Gerhard Hanswille. "Composite Shear Head Systems for Improved Punching Shear Resistance of Flat Slabs." In Fifth International Conference on Composite Construction in Steel and Concrete. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40826(186)22.

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Searer, Gary R., Terrence F. Paret, Joseph Valancius, and James C. Pan. "Cracking in Concrete Fill on Metal Decks, Cracking in Flat Plate Concrete Slabs, and Cracking in Concrete Walls." In Structures Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41031(341)252.

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Xu, P. B., J. S. Cheng, and H. M. Wen. "Numerical Study on Through-Thickness Cone Cracking of Reinforced Concrete Slabs Struck Normally by Flat-Ended Projectiles." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54574.

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Through-thickness cone cracking is one of major failures which needs to be considered in the safety calculations and assessment of containment structures in a nuclear power plant. In this paper, numerical study is performed on the through-thickness cone cracking of reinforced concrete slabs subjected to impact by flat-ended projectiles at normal incidence. First, a recently proposed 3D meso-mechanical model together with a recently developed computational concrete constitutive model are briefly described and then employed to study numerically the problem. The present numerical predictions are compared with some available experimental results. Furthermore, the 3D meso-mechanical model predictions are also compared with the numerical results obtained from FEM (finite element method) model. It transpires that the present numerical simulations are in good agreement with available experimental observations for the through-thickness cone cracking of reinforced concrete slabs struck normally by flat-nosed missiles. It also transpires that the 3D meso-mechanical model can predict more accurately than the FEM model in terms of the details of crack patterns though these two models produce similar results for relatively low velocities.
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Bu, Wensheng, and Maria Anna Polak. "Punching Shear Retrofit of Reinforced Concrete Flat Slabs Subjected to Static and Reversed Cyclic Loads." In IABSE Symposium, Weimar 2007: Improving Infrastructure Worldwide. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2007. http://dx.doi.org/10.2749/222137807796120076.

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Somja, Hugues, Mohammed Hjiaj, Quang Huy Nguyen, André Plumier, and Hervé Degee. "THE SMARTCOCO DESIGN GUIDE FOR HYBRID CONCRETE-STEEL STRUCTURES." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.7023.

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Standard buildings in steel and in reinforced concrete are constructed by two different industrial sectors with little interaction. Even steel-concrete composite buildings remain designed as steel structures, with a limited benefit of the presence of concrete slabs. For some years however, a more integrated design between both materials is used, merely in high rise and heavy loaded structures. This new trend is not supported by actual standards that give little guidance for the specific arrangements that come from this new practice. The RFCS SMARTCOCO research project is intended to fill these gaps in knowledge and provide design guidance for some composite elements covered neither by Eurocode 2 nor by Eurocode 4 : composite columns or walls reinforced by several fully encased steel sections, reinforced concrete columns reinforced by one steel section over the height of one storey and concrete flat slabs or beams connected to columns or walls by means of steel shear keys. Gaps in knowledge are mostly related to force transmission between concrete and embedded steel profiles. A generic design approach has been developed and then used to design test specimens. The results have been used to calibrate the design proposals. The output is a design guide which complements Eurocode 2 and 4.
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Locmanis, Janis, Rolands Cepuritis, and Bradley J. Pease. "Determination of screw anchor capacity in ultra-thin steel fiber reinforced self-stressing concrete (SFRSSC) flat slabs." In 19th International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering, 2020. http://dx.doi.org/10.22616/erdev.2020.19.tf121.

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Shatnawi, Anis, Mu'Tasim Abdel-Jaber, and Khair Al-Deen Bsisu. "Experimental Investigation of One-Way Shear Behavior in Reinforced Concrete Flat Slabs Strengthened with Micro-Polypropylene Fibers." In 2016 4th International Conference on Sensors, Mechatronics and Automation (ICSMA 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/icsma-16.2016.48.

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Reports on the topic "Concrete flat slabs"

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Ravazdezh, Faezeh, Julio A. Ramirez, and Ghadir Haikal. Improved Live Load Distribution Factors for Use in Load Rating of Older Slab and T-Beam Reinforced Concrete Bridges. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317303.

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This report describes a methodology for demand estimate through the improvement of load distribution factors in reinforced concrete flat-slab and T-beam bridges. The proposed distribution factors are supported on three-dimensional (3D) Finite Element (FE) analysis tools. The Conventional Load Rating (CLR) method currently in use by INDOT relies on a two-dimensional (2D) analysis based on beam theory. This approach may overestimate bridge demand as the result of neglecting the presence of parapets and sidewalks present in these bridges. The 3D behavior of a bridge and its response could be better modeled through a 3D computational model by including the participation of all elements. This research aims to investigate the potential effect of railings, parapets, sidewalks, and end-diaphragms on demand evaluation for purposes of rating reinforced concrete flat-slab and T-beam bridges using 3D finite element analysis. The project goal is to improve the current lateral load distribution factor by addressing the limitations resulting from the 2D analysis and ignoring the contribution of non-structural components. Through a parametric study of the slab and T-beam bridges in Indiana, the impact of selected parameters on demand estimates was estimated, and modifications to the current load distribution factors in AASHTO were proposed.
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