角钢约束高强混凝土偏压短柱力学性能的试验与理论研究  

Experimental and theoretical research on mechanical behavior of angle reinforced high-strength concrete short columns subjected to eccentric compression

作　　者：张文福[1] 杜娟[1] 董清会[1] 计静[1] 任亚文[1] 梁文峰[1] 

机构地区：[1]东北石油大学防灾减灾工程及防护工程省高校重点实验室,黑龙江大庆163318

出　　处：《建筑结构学报》2013年第S1期252-258,共7页Journal of Building Structures

基　　金：黑龙江省教育厅重点项目(12511z004);国家自然科学基金项目(51178087);黑龙江省教育厅科学技术研究面上项目(12511022);教育部高等学校博士学科点专项科研基金项目(20122322120004)

摘　　要：为研究角钢约束高强混凝土短柱的偏压性能,以偏心率为参数开展了5根长细比为3的角钢约束高强混凝土短柱试验研究,观察试件在偏压作用下的破坏现象和破坏过程,获得5个试件的荷载-位移曲线、角钢及缀板的荷载-应变曲线及荷载-侧向位移曲线。研究表明,角钢约束高强混凝土短柱具有较高的承载性能,其延性性能及承载力随着偏心率的增加而降低,当试件的偏心率为0.333时,承载力减小幅度达到60.8%。通过分析得到试件的承载力和钢材的应变发展规律及不同偏心率下角钢混凝土短柱的P-M相关曲线,给出偏压试件承载力的比值Pue/Pu0与偏心率e'0的关系。最后提出角钢约束高强混凝土短柱偏压承载力简化设计公式,计算结果与试验结果吻合良好。In order to study the eccentric compression behavior of angle reinforced high-strength concrete(SARC) short columns,tests on five SARC short columns with a slenderness ratio of 3.0 were carried out subjected to eccentric compressive load.Firstly,the damage phenomenon was recorded in the process of the eccentric compression test.Five groups of load-displacement curves,angle and the batten plate load-strain curves and load-lateral displacement curves were obtained.The research shows that the bearing capacity and ductility of SARC columns are higher than the common reinforced concrete columns,but the ductility performance and bearing capacity descend with the increasing of eccentric ratio.When the eccentricity of specimen is 0.333,the bearing capacity is reduced by up to 60.8%.Through analysis the bearing force,strain development law of steels and SARC short columns P-M curves under different eccentricities were obtained,and the relationship between the ratio of bearing capacity of the eccentric specimens Pue / Pu0 and the eccentricity e' 0 was given.Finally,a simplified design formula for SARC columns subjected to eccentric compression was proposed,and the calculated results were in good agreement with the experimental results.

关 键 词：角钢约束高强混凝土 短柱 偏心受压 静力试验 简化设计公式 

分 类 号：TU375.3[建筑科学—结构工程]