Author(s)

H. Kinugasa, S. Nomura

Abstract

Failure mechanism of RC beam under reversed cyclic loading after flexural yielding caused by lateral strain accumulation in plastic-hinging region H. Kinugasa, S. Nomura Faculty of Science and Engineering, Department of Architecture, Science University of Tokyo, Japan Abstract The purpose of this paper is to show the existence of a new shear failure mode which is caused by reversed cyclic loading after flexural yielding. Under reversed cyclic loading, shear-resisting system in the plastic-hinging region repeats temporary disappearance and rebuilding. The temporary disappearance is caused by temporary opening of all the cracks just after changing loading direction. The temporary disappearance generates residual lateral strain in the plastic-hinging region. The increase in the residual lateral strain expands the temporary disappearance and the expanded temporary disappearance generates more lateral strain. This failure mode is caused by the abnormal expansion of the temporary disappearan

Keywords