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Indexed by:期刊论文

Date of Publication:2014-11-01

Journal:EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS

Included Journals:SCIE、EI、Scopus

Volume:43

Issue:14

Page Number:2115-2134

ISSN No.:0098-8847

Key Words:force analogy method; reinforced concrete framed structures; geometric nonlinearity; stiffness degradation; strength deterioration; structural member failure; rotation hinge; slide hinge

Abstract:A method of nonlinear seismic analysis for RC framed structures considering full-range factors, including stiffness and strength degradation, geometric nonlinearity, and structural member failure, is established based on the fundamental concept of the force analogy method. The strong material nonlinearity, large geometric deformation, and internal forces redistribution due to the member failure can be depicted by the proposed local plastic mechanisms, the rotation hinges at the member ends and the slide hinges assigned to the columns, of which the measurement relationships are moment versus plastic rotation and shear force versus shear plastic deformation, respectively. They are capable of evaluating the exact response of RC structures. Because only unchanging initial stiffness matrices are used through the whole computation process, the state-space formulation was used for solving the equations of motion. The advantages of the force analogy method, such as high efficiency and stability, are still retained. The exactness of the proposed local plastic mechanisms is verified against a group of tests data, and the application of the proposed procedure is performed to an RC framed structure to simulate the full-range nonlinear response by increasing the excitation step by step until failure of partial structural members appear. Copyright (c) 2014 John Wiley & Sons, Ltd.