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Study on Concrete-Filled CFRP-Steel Tubular Beam-Column with Square Cross-Section
Tests on twenty-four concrete-filled CFRP-steel tubular beam-columns with square cross-section are conducted (S-CF-CFRP-ST). The experimental consequences show that the axial compression-deflection curve on the cross-section at the mid-height of the composite beam-column could be classified into three stages, i.e., the elastic stage, the elasto-plastic stage and the softening stage, and the failure mode of the specimen is ductile. Analyses show that the CFRP and the steel tube can work together in both longitudinal and transverse directions during the entire loading process, and the longitudinal strains in the steel tube along the depth of the mid-height cross-section are satisfied with the plane section assumption. Furthermore, the steel tube under longitudinal tension has little confinement effect on its nearby concrete. Finite element model is built to predict the deformed mode and the curves of axial compression-deflection of the members. The predicted results agree well with the tested ones. Simultaneously, the effects of several factors on the static performance of these composite members are investigated. Equation for calculating the strength of S-CF-CFRP-ST beam-column is suggested, and the rationality of the presented equation is estimated through comparison of the predicted results with the tested ones.
Study on Concrete-Filled CFRP-Steel Tubular Beam-Column with Square Cross-Section
Tests on twenty-four concrete-filled CFRP-steel tubular beam-columns with square cross-section are conducted (S-CF-CFRP-ST). The experimental consequences show that the axial compression-deflection curve on the cross-section at the mid-height of the composite beam-column could be classified into three stages, i.e., the elastic stage, the elasto-plastic stage and the softening stage, and the failure mode of the specimen is ductile. Analyses show that the CFRP and the steel tube can work together in both longitudinal and transverse directions during the entire loading process, and the longitudinal strains in the steel tube along the depth of the mid-height cross-section are satisfied with the plane section assumption. Furthermore, the steel tube under longitudinal tension has little confinement effect on its nearby concrete. Finite element model is built to predict the deformed mode and the curves of axial compression-deflection of the members. The predicted results agree well with the tested ones. Simultaneously, the effects of several factors on the static performance of these composite members are investigated. Equation for calculating the strength of S-CF-CFRP-ST beam-column is suggested, and the rationality of the presented equation is estimated through comparison of the predicted results with the tested ones.
Study on Concrete-Filled CFRP-Steel Tubular Beam-Column with Square Cross-Section
Iran J Sci Technol Trans Civ Eng
Wang, Qing-li (author) / Duan, Chang-zhi (author) / Peng, Kuan (author) / Shao, Yong-bo (author)
2022-08-01
15 pages
Article (Journal)
Electronic Resource
English
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