摘要
为研究型钢活性粉末混凝土(reactive powder concrete,RPC)柱大偏心受压力学性能,采用足尺试件进行大偏心受压试验.制作了6根截面尺寸为300 mm×350 mm,高度为3000 mm的型钢RPC柱,进行大偏压承载力性能试验,观察受力过程及破坏形态,测量极限承载力、侧向挠度及截面应变.试验结果表明,该组合结构具有较高的承载力及良好的变形能力,受压区RPC基本符合平截面假定,柱的极限承载力随含钢率的增加而提高,随偏心距的增大而降低.基于平截面假定,考虑截面受拉区RPC拉应力的贡献,建立了足尺型钢RPC柱的极限承载力计算公式,可供工程设计时参考.
In order to study the mechanical performance of steel reactive powder concrete(RPC)columns under large eccentric loading,large-scale eccentric compression tests were carried out using full-scale test pieces.Six steel RPC columns with section size of 300 mm×350 mm and height of 3000 mm were fabricated for large-capacity bearing capacity performance tests.The force process and failure modes were observed,and the ultimate bearing capacity,lateral deflection and section strain were obtained.The test results show that the composite structure has high bearing capacity and good deformation capacity,and the compression zone of RPC basically conforms to the assumption of flat section.The ultimate bearing capacity of the column increases with the increase of steel ratio and decreases with the increase of eccentricity.Based on the assumption of flat section,the calculation formula of the ultimate bearing capacity of the full-scale steel reinforced RPC column is established by considering the contribution of the tensile stress of the RPC in the tension zone of section,which can be used as a reference for engineering design.
作者
卜良桃
秦川
BU Liangtao;QIN Chuan(School of Civil Engineering,Hunan University,Changsha 410082,Hunan Province,P.R.China)
出处
《深圳大学学报（理工版）》
EI
CAS
CSCD
北大核心
2019年第6期606-613,共8页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(51278187)
中国工程建设标准化协会资助项目(2018-030)~~
关键词
结构工程
活性粉末混凝土
组合结构
大偏压试验
抗拉强度
弯矩增大系数
极限承载力
structural engineering
reactive powder concrete
composite structure
large eccentric loading experiment
tensile strength
bending moment increase coefficient
ultimate bearing capacity
