Abstract
In this paper, a new web reinforcement layout for RC shear walls was presented to improve the seismic performances of RC traditional walls. Two RC ductile frames and two RC framed shear wall specimens were designed and tested under cyclic loading at the National Center for Research on Earthquake Engineering. The test results showed that the proposed shear walls with extra concentric circles web reinforcement had greater ductility and higher energy dissipation than those of traditional RC shear walls. Moreover, the test results also indicated that the improved RC shear walls can effectively prevent the inclined shear cracks from happening and developing into the wall. This implies that large “X-shaped” bi-diagonal shear cracks can be avoided; instead, a number of minor cracks gradually and uniformly propagate into the wall surface. As a result, more ductile failure mode can be expected when the proposed high seismic performance of RC shear walls appear in the engineering practice.
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