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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Experimental Study of Beam-Supported Slabs Under In-Plane Loading
Author(s): Masayoshi Nakashima, Ti Huang, and Le-Wu Lu
Publication: Journal Proceedings
Appears on pages(s): 59-65
Keywords: beams (supports): concrete slabs; cracking (fracturing); cyclic
loads; diaphragms (concrete); earlhqoake resistant structures; finite element
method; floors; loads (forces); models; reinforced concrete; shear strength;stiffness; structural analysis.
Abstract:This paper descrfbes an experimental investigation on the seismic behavior of reinforced concrete beam supported floor slabs as diaphragms in building structures. Scale modeIs of a portion of the floor system were tested to examine in-plane behavior. Variables in the tests were: (1) type of loading (monotonic versus cyclic loading), (2) length of shear span, and (3) intensity of vertical (gravity) load. The in-plane strength of the slab panel was found to be controlled by a crack developing parallel to the loading and along the boundary between the column and middle strips, named a major crack. Cyclic loading or the application of the vertical load reduced the ultimate strength by 15 to 25 percent. In-plane stiffness continuously decreased as load increased. The fracture of reinforcing bars at their intersections with the major crack caused the sfabs to fail. A non-linear finite element modeling of the slab structure resulted in reasonable estimation of the experimental load-deflection curves as weff the crack pattern.
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