Journal:Structures

Abstract:The residual axial compressive strength of a vertical structural member after experiencing severe earthquake motions is of great importance to avoid structure collapse. The residual structural behavior of concrete-filled bimetallic tube (CFBT) columns after subjected to reversed cyclic lateral loads is investigated through experimental tests and finite element analysis. A total of ten specimens, comprising eight CFBT columns and two concrete-filled steel tube (CFST) columns, were subjected to reversed cyclic lateral loading and subsequent axial compression to assess their residual load-carrying capacity. The main parameters considered included the concrete strength and the axial compression ratio. The results indicate that, the axial compression failure modes of CFBT columns after subjected to reversed cyclic lateral loading were marked by localized bulging in the steel tube and overall deformation. When the axial compression ratio is less than 0.60, the CFBT columns maintain more than 70 % of their initial load-carrying capacity. A formula for calculating the residual axial compressive strength of CFBT columns after subjected to reversed cyclic lateral loads is proposed.

Indexed by:Journal paper

Page Number:2025,80:109679

Translation or Not:no

Included Journals:SCI

First Author:姜航

Co-author:刘小娟,郭子雄

Correspondence Author:叶勇