实腹式配钢L形截面异形柱轴心受压承载力分析  

BEARING CAPACITY ANALYSIS OF L-SHAPED STEEL SPECIAL-SHAPED COLUMN WRAPPED WITH CONCRETE UNDER AXIAL COMPRESSION

作　　者：张爱林[1] 武保焕 刘学春[1] ZHANG Ailin;WU Baohuan;LIU Xuechun(Beijing Engineering Research Center of High-Rise and Large-Span Prestressed Steel Structure,Beijing 100124,China)

机构地区：[1]北京工业大学北京市高层和大跨度预应力钢结构工程技术研究中心,北京100124

出　　处：《工业建筑》2021年第6期123-132,164,共11页Industrial Construction

基　　金：国家重点研发计划项目(2016YFC0701100);国家自然科学基金项目(51978013)。

摘　　要：为研究实腹式配钢L形截面异形柱的型钢强度、混凝土强度、型钢翼缘厚度、型钢腹板厚度、柱高、栓钉及箍筋间距等关键参数对异形柱承载能力和破坏形式的影响,共设计5组对比构件进行轴心受压有限元模拟分析。获得异形柱破坏模式、荷载-位移曲线、各组成部分应力分布等,分析异形柱轴心受压性能。结果表明实腹式配钢L形截面异形柱构件构造合理;随着型钢强度、配钢率和混凝土强度的增大,承载力逐渐上升;当柱高范围为3~5 m时,柱高对异形柱极限承载力影响不大;栓钉间距和箍筋间距对于承载能力影响可以忽略。In order to study the influence of key parameters such as steel strength,concrete strength,steel flange thickness,steel web thickness,column height,stud spacing,and stirrup spacing on the bearing capacity and failure mode of L-shaped steel special-shaped columns,a total of 5 sets of comparative members were designed for the finite element analysis under axial compression.The failure mode,load-displacement curve,stress distribution of profiled steel and concrete,etc.were obtained to analyze the performance of the special-shaped column under axial compression.The results showed that the structure of the special-shaped column with L-shaped steel was reasonable.With the increase of steel strength,steel ratio and concrete strength,the bearing capacity gradually increased.When the column height changed from 3 meters to 5 meters,it had little effect on the ultimate bearing capacity of special-shaped columns.The effects of stud spacing and stirrup spacing on the bearing capacity could be ignored.

关 键 词：外包混凝土 L形型钢混凝土异形柱 轴压 承载能力 

分 类 号：TU398.9[建筑科学—结构工程]