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Indexed by:期刊论文

Date of Publication:2015-01-01

Journal:STEEL AND COMPOSITE STRUCTURES

Included Journals:SCIE、EI、Scopus

Volume:18

Issue:1

Page Number:213-233

ISSN No.:1229-9367

Key Words:recycled aggregate concrete-filled steel tube (RACFST); finite element analysis (FEA); beam-columns; cyclic loading; bearing capacity; mechanism

Abstract:A nonlinear finite element analysis (FEA) model is presented for simulating the behaviour of recycled aggregate concrete-filled steel tube (RACFST) beam-columns subjected to constant axial compressive load and cyclically increasing flexural loading. The FEA model was developed based on ABAQUS software package and a displacement-based approach was used. The proposed engineering stress versus engineering strain relationship of core concrete with the effect of recycled coarse aggregate (RCA) replacement ratio was adopted in the FEA model. The predicted results of the FEA model were compared with the experimental results of several RACFST as well as the corresponding concrete-filled steel tube (CFST) beam-columns under cyclic loading reported in the literature. The comparison results indicated that the proposed FEA model was capable of predicting the load versus deformation relationship, lateral bearing capacity and failure pattern of RACFST beam-columns with an acceptable accuracy. A parametric study was further carried out to investigate the effect of typical parameters on the mechanism of RACFST beam-columns subjected to cyclic loading.