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Simplified and Advanced Analysis of Membrane Action of Concrete Slabs by ProQuest

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This paper presents a comparison between a simple analytical approach based on rigid-plastic behavior with a change of geometry, an advanced finite element model (FEM), and 14 tests on horizontally-unrestrained concrete slabs that reached vertical displacements up to 10 times the effective depth of the slab. Both analytical approaches predicted the membrane behavior of the slabs, comprising compressive membrane action around the slab's perimeter and tensile membrane action in the central span region of the slab. The simple approach produced good predictions of the load-displacement response toward the end of the test, whereas the FEM produced reasonable predictions over the full history of the test. By considering the magnitude and pattern of the stresses within the FEM, the assumptions adopted within the simple approach were investigated and are discussed. Overall, the comparison of the simple approach against the FEM and test results shows that it can safely be used for predicting the load-carrying capacity, due to membrane action, of concrete slabs under large displacements. [PUBLICATION ABSTRACT]

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									 ACI STRUCTURAL JOURNAL
Title no. 105-S04


Simplified and Advanced Analysis of Membrane Action
of Concrete Slabs
by Colin G. Bailey, Wee S. Toh, and Bok M. Chan

This paper presents a comparison between a simple analytical            avoided, albeit with a decrease in the slab’s load-carrying
approach based on rigid-plastic behavior with a change of geometry,     capacity, provided the slab’s boundaries remain vertically
an advanced finite element model (FEM), and 14 tests on horizontally-   supported. The use of membrane action at small displacements
unrestrained concrete slabs that reached vertical displacements up      has been successfully used in practical design,13 notably in
to 10 times the effective depth of the slab. Both analytical
approaches predicted the membrane behavior of the slabs,
   
								
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