型钢混凝土异形柱正截面承载力试验及有限元分析  

Experimental study and finite element analysis on normal section bearing capacity of steel reinforced concrete special-shaped columns

作　　者：陈宗平[1] 王妮[1] 钟铭[1] 薛建阳[2] 苏益声[1] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《建筑结构学报》2013年第10期108-119,共12页Journal of Building Structures

基　　金：国家自然科学基金项目(50908057;51268004);广西科学基金项目(桂科青0832004);广西研究生创新计划项目(GXU11T31083)

摘　　要：为研究型钢混凝土(SRC)异形柱的正截面承载力性能,设计22个试件进行静力和循环加载试验研究,分析其破坏机理。编写了计算机程序,利用程序分析了加载角、截面配钢形式、配钢率、混凝土强度等级以及柱肢高厚比等变化参数对SRC异形柱正截面承载力的影响,并与钢筋混凝土(RC)异形柱的正截面承载力进行对比分析。研究结果表明:SRC异形柱破坏形态表现为大偏心受压破坏、小偏心受压破坏和轴心受压破坏;截面应变基本符合平截面假定;加载角和截面配钢形式对正截面承载能力有显著影响,T形柱的薄弱加载方向是0°、90°和315°,L形柱的薄弱加载方向是90°和315°,十形柱的薄弱加载方向是0°,实腹配钢比空腹配钢试件的承载能力有明显提高;适当增加截面配钢率、混凝土强度等级以及柱肢高厚比均能有效提高SRC异形柱的正截面承载能力;当截面配钢率不大于6%时,SRC异形柱的承载力与普通的RC异形柱相比提高36%以上。In order to research the normal section bearing capacity of steel reinforced concrete （SRC） special-shaped columns, 22 specimens were designed for static loading and low cycle reversed loading test, and the failure mechanism was analyzed. A set of computer programs were compiled, and the influences of the loading-angle, steel disposition forms, sectional steel ratio, concrete strength grade and depth-thickness ratio of column limb on the normal section bearing capacity of SRC special-shaped columns were analyzed. Finally comparison of SRC special-shaped columns and RC special-shaped columns on normal section bearing capacity was conducted. The research results show that the failure patterns of SRC special-shaped columns are large eccentric compression, small eccentric compression and axial compression. The sectional strain basically fits the plane-section assumption. The influences of loading-angle and steel disposition forms on the bearing capacity of normal section are very large. Weak loading directions of T-shaped column are 0°, 90° and 315°. Weak loading directions of L-shaped column are 90° and 315°. Weak loading direction of ＋ - shaped column is 0°. The bearing capacity of solid-web steel disposition increases obviously, compared with the open- web steel disposition. The increases of the sectional steel ratio, concrete strength grade and depth-thickness ratio of column limb can improve the normal section bearing capacity effectively. Compared with the RC special-shaped columns, when the sectional steel ratio is no more than 6%, the bearing capacity is increased more than 36%.

关 键 词：型钢混凝土异形柱 静力试验 拟静力试验 有限元分析 正截面承载力 

分 类 号：TU392.1[建筑科学—结构工程] TU317.1