Permissible-stress design of ground-floor slabs

Abbas, Ali A.; Pavlovi?, M. N.; Kotsovos, Michael D.

doi:10.1680/stbu.157.6.369.52108

Cited by 2 publications

(9 citation statements)

References 3 publications

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“…A comparison with the results of experimental tests carried out by Childs et al 12 (slab 2) found 9 that there is a strong resemblance between the experimental load-deflection curves and the corresponding NLFEA results, which are closer to the experimental results than the LFEA 8,9 results. The latter, in turn, were found to be closer than the Westergaard 10 predictions.…”

Section: Comparison With Experimental Resultsmentioning

confidence: 62%

“…6 m was adopted for the thickness of subgrade in the present NLFEA, which is the same value that was used in the LFEA. 8 This is not only a representative practical value but it also helps to achieve an acceptable aspect ratio for the subgrade elements used in the present FE mesh.…”

Section: Sensitivity Analyses For the Nlfeamentioning

confidence: 98%

“…The same mesh size used in the LFEA, 8 based on a series of sensitivity analyses, was also adopted for the present NLFEA. Therefore, the 3 m slab was divided into a regular mesh of 100 elements-that is, each of width 0 .…”

Section: Sensitivity Analyses For the Nlfeamentioning

confidence: 99%

“…The results of the present NLFEA were also compared with the LFEA 8,9 results, and the current elastic 10,14 and plastic 2-5 design guidelines for plain and fibre-reinforced concrete slabs, as depicted in Fig. 13.…”

Section: Comparison With Current Design Guidelinesmentioning

confidence: 99%

“…The significance of the curves lies in providing information on slab deflections after cracking takes place, thus bridging the current gap between elastic and plastic solutions. The NLFEA results will also be compared with their counterparts obtained in the previous linear finite-element analysis (LFEA), 8 hence allowing conclusions to be made on the true structural behaviour of the slab.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Post-elastic behaviour of ground-floor slabs. Part 1: Plain-concrete slabs

Abbas¹,

Pavlović²,

Kotsovos³

2007

Magazine of Concrete Research

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There is a growing trend to utilise ground-floor slabs (GFS) beyond their elastic limit, notably using plastic analysis. The current paper focuses on the inelastic behaviour of such slabs by means of non-linear finite-element analysis (NLFEA) and represents the first paper of a two-part study. This first paper considers the analysis of plain-concrete slabs. The second paper will concentrate on the study of fabric-reinforced concrete slabs. The NLFEA utilises a concrete constitutive model that is based on valid experimental data on concrete behaviour under triaxial states of stress. The present study proposes a new performance-based (PB) definition for the failure criterion that takes into account the all-important slope condition that often governs practical design. NLFEAbased design charts are produced and their predictions are validated by comparison with existing experimental results. The proposed design charts are also compared with existing elastic and plastic guidelines, and thus recommendations are made on the safety and economy of these guidelines.

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Section: Comparison With Experimental Resultsmentioning

confidence: 62%

Section: Sensitivity Analyses For the Nlfeamentioning

confidence: 98%

Section: Sensitivity Analyses For the Nlfeamentioning

confidence: 99%

Section: Comparison With Current Design Guidelinesmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Post-elastic behaviour of ground-floor slabs. Part 1: Plain-concrete slabs

Abbas¹,

Pavlović²,

Kotsovos³

2007

Magazine of Concrete Research

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Elastic analysis of ground-floor slabs under multiple loads

Abbas¹,

Pavlović²,

Kotsovos³

2007

Proceedings of the Institution of Civil Engineers - Structures

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The design of ground-floor slabs focuses mainly on single-load cases applied at the centre, edge and corner of the slab. The need for extending existing guidelines that allow for the effect of multiple loads, and for the effect of loads being at some distance from the three aforementioned locations, is fundamental for both safety and economy, and is increasingly recognised in the industry. Some elastic guidelines, which date back nearly a century ago, do exist but they are incomplete, cumbersome and generally little known. In the present paper, a new set of influence lines (previous data really refer to certain stress contours) is proposed for both stresses and deflections owing to loads moving along the centrelines, edges and corner bisectors. These diagrams are based on linear finite element analysis (LFEA), and thus allow the use of direct superposition to accommodate any number of applied loads. Nonlinearities and/or plastic methods are outside the scope of this paper.

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Permissible-stress design of ground-floor slabs

Cited by 2 publications

References 3 publications

Post-elastic behaviour of ground-floor slabs. Part 1: Plain-concrete slabs

Post-elastic behaviour of ground-floor slabs. Part 1: Plain-concrete slabs

Elastic analysis of ground-floor slabs under multiple loads

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