doi:10.3850/978-981-08-7920-4_S2-S77-cd
Shear Behavior of Lightweight Sandwich Reinforced Concrete Slabs
Vanissorn Vimonsatit, Ade S. Wahyuni and Hamid Nikraz
Department of Civil Engineering, Curtin University, Perth, Australia.
ABSTRACT
A new lightweight sandwich reinforced concrete (LSRC) section has been developed which is
suitable to be used for slab members in reinforced concrete structures. Prefabricated autoclaved
aerated concrete (AAC) blocks are used as infill in the slab section where the concrete is
considered ineffective under bending. As a result, the flexural capacity of an LSRC section is
expected to be the same as equivalent solid section having identical height. The ability to resist
shear is however in question as theAAC infill generally has lower strength grade than that of the
normal dense concrete. This paper presents a numerical investigation into the behavior of LSRC
slabs when shear is critical and the slabs will failure in shear. ANSYS version 12.1 is employed
to develop three dimensional nonlinear finite element models of LSRC slabs. The numerical
study will be compared with the test results. Some differences in the results were found due to
the support modeling. The hinge-hinge support over predicted both the strength and stiffness
of the modeled slabs when compared with the tested slabs, while the hinge-roller support
condition led to underestimated outcomes. Recommendations for the modeling improvement
are made.
Keywords: Lightweight concrete, Reinforced concrete, Composite section, Sandwich section.
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