Stress-strain relationship of recycled self-compacting concrete filled steel tubular column subjected to eccentric compression  

作　　者：Feng YU Cheng QIN Shilong WANG Junjie JIANG Yuan FANG 

机构地区：[1]College of Civil Engineering,Anhui University of Technology,Ma'anshan 243002,China

出　　处：《Frontiers of Structural and Civil Engineering》2020年第3期760-772,共13页结构与土木工程前沿（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.51578001,51608003,and 51878002);Natural Science Foundation granted by Department of Education,Anhui Province(No.KJ2015ZD10);Key Research and Development Plan of Anhui Province(No.1704a0802131);the Outstanding Young Talent Support Program of Anhui Province(No.gxyqZD2016072);This work was also supported by the Graduate Innovation Research Foundation granted by Anhui University of Technology(Nos.2016097,2016094).

摘　　要：As a typical compression member,the concrete-filled steel tube has been widely used in civil engineering structures.However,little research on recycled self-compacting concrete flled circular steel tubular(RSCCFCST)columns subjected to eccentric load was reported.In this study,21 specimens were designed and experimental studies on the stress-strain relationship of were carried out to study the mechanical behaviors.Recycled coarse aggregate replacement ratio,concrete strength grade,length to diameter ratio and eccentric distance of specimens were considered as the main experimental parameters to carry out eccentric compression tests.The corresponding stress-strain relationship curves were used to analyze the influence of concerned parameters on ecentric load-bearing capacity of RSCCFCST columns.The experimental results show that the strain of the eccentric compression stress-strain curves increase with the increase of recycled coarse aggregate replacement ratio and concrete strength grade.With increase of eccentric distance,the ductility of specimens increases while the bearing capacity decreases.Moreover,a phenomenological model of RSCCFCST columns is proposed,which exhibits versatile ability to capture the process during loading.The present study is expected to further understanding the behaviors and to provide guidance of RSCCFCST columns in design and engineering applications.

关 键 词：concrete flleld circular steel tubular columns recycled self-compacting concrete eccentric compression recycled coarse aggregate replacement ratio stress-strain relationship 

分 类 号：TU375[建筑科学—结构工程]