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http://dx.doi.org/10.12989/scs.2021.40.6.839

Behaviors of RPC-filled double skin steel tubular stub columns under axial compression loading  

Hao, Wenming (School of Civil Engineering, Xi'an University of Architecture and Technology)
Xie, Qifang (School of Civil Engineering, Xi'an University of Architecture and Technology)
Zhang, Yun (School of Civil Engineering, Xi'an University of Architecture and Technology)
Xu, Dunfeng (School of Civil Engineering, Xi'an University of Architecture and Technology)
Zhang, Zhitian (Hengsheng Electric Power Development Co., Ltd.)
Publication Information
Steel and Composite Structures / v.40, no.6, 2021 , pp. 839-851 More about this Journal
Abstract
This paper presents the compressive behaviors of RPC-filled double skin steel tubular (RFDST) stub columns. Six RFDST stub column specimens, with different hollow ratios and constraint coefficients, were tested under axial compression loading. The compressive behaviors, such as failure mode, strength and ductility, were analyzed. It is found that the failure mode of RPC filled steel tube (RFST) stub column is shear failure, while RFDST stub columns are waist drum failure. The load deformation curves of RFDST specimens with different hollow ratio and constraint coefficient show different characteristics. RFDST specimens exhibit high bearing capacity and good ductility. Based on the test results of existing RFDST stub columns, a design formula for predicting the ultimate bearing capacity is given. A finite element model is also presented to analyze the compressive behaviors, and good agreement is obtained. The influences of hollow ratio and constraint coefficient on the ultimate bearing capacity are discussed.
Keywords
axial compression; behavior; finite element model; RPC-filled double skin steel tube;
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