型钢偏心对型钢混凝土柱承载力的影响  

Influence of steel placement eccentricity on bearing capacity of SRC columns

作　　者：阿里甫江.夏木西[1] 张德娟[1] 

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830008

出　　处：《河海大学学报（自然科学版）》2009年第2期185-189,共5页Journal of Hohai University(Natural Sciences)

基　　金：新疆大学自然科学基金(070202);国家自然科学基金(50668003)

摘　　要：为了利用非线性推覆分析(Push-over)方法分析型钢偏心对型钢混凝土(SRC)柱承载力的影响,建立了SRC柱的Push-over分析模型,进行了偏心SRC柱的偏心受压试验和Push-over计算,验证了Push-over方法用于SRC柱分析的可靠性,并用Push-over方法分析了当SRC柱的长度和荷载作用位置等参数变化时,随着型钢偏心距的不同,SRC柱受力性能的变化情况,找出了型钢偏心对整柱承载力影响的变化规律.分析结果表明:当荷载和型钢同时偏心在截面形心轴的同一侧时,荷载偏心距较小的SRC柱的承载力随着型钢偏心位置的增大而减少,荷载偏心距较大的SRC柱的承载力随着型钢偏心位置的增加而略有增加;当荷载和型钢偏心在截面形心轴的两侧时,无论荷载偏心距的大小,SRC柱的承载力随着型钢偏心位置的增加而增加,但其变化幅度不大.In order to analyze the influence of steel placement eccentricity on the beating capacity of SRC columns using of nonlinear push-over analysis （Push-over） method, the Push-over model for SRC columns was established. In addition to the Push-over calculations, tests on the loading eccentricity of SRC columns were performed. The reliability of the Push-over method in analysis of SRC columns was validated. The present method was employed to study the properties of the SRC columns under loading with various column lengths, steel placements and loading eccentricities. The rules of influence of the steel placement eccentricity of SRC columns on the bearing capacity were detemfined. The analytic results show that when the load and steel are placed on the same side of the central axis of the cross-section, the bearing capacity of the SRC columns with smaller loading eccentricity decreases with the increase of the steel placement eccentricity, while that with a larger loading eccentricity increases slightly with the increase of the steel placement eccentricity. When the load and steel are placed on the opposite sides of the central axis of the cross-section, the bearing capacity of the SRC columns with arbitrary loading eccentricity increases with the increase of the steel placement eccentricity, but the variation amplitude is small.

关 键 词：型钢混凝土柱 非线性推覆分析 型钢偏心 偏心受压 承载力 混凝土 

分 类 号：TU375.3[建筑科学—结构工程]