L形方钢管混凝土组合异形柱单向压弯稳定性研究  

Research on unidirectional compression-bending stability of L-shaped specially-shaped column composed of concrete-filled square steel tube

作　　者：张广泰[1] 李凤彬[1] 荣彬[1] 

机构地区：[1]新疆大学建筑工程学院,乌鲁木齐830047

出　　处：《建筑结构》2015年第8期69-73,共5页Building Structure

基　　金：新疆维吾尔自治区自然科学基金资助项目(201233146-4)

摘　　要：在对构件单向压弯受力特点分析的基础上,设计了L形方钢管混凝土组合异形柱单向压弯试件。通过压弯试验,得到了构件的破坏形式、荷载-竖向位移曲线、单肢挠度曲线和荷载-应变曲线。通过对我国现行的四本规程中的压弯稳定计算公式的计算结果进行比较发现,在计算开孔连接板连接的L形方钢管混凝土组合异形柱的压弯承载力时,作为缀件的连接板对构件压弯承载力的贡献不应被忽略,应采用整体式计算模型进行计算。CECS159∶2004规程和GJB 4142—2000规程的计算结果与试验结果吻合良好。Based on the analysis of the stress of unidirectional compression-bending components,L-shaped specially-shaped columns composed of concrete-filled square steel tubes under unidirectional compression-bending loading were designed.Through the compression-bending experiment,failure modes,curves of loading and vertical displacement,deflection curves and loading-strain curves for single-limb columns were obtained. By comparing with the numerical results calculated by formulas of the buckling stability from four current specifications in China,the contribution of the connecting plate as lattice component on the compression-bending bearing capacity of the component should not be ignored when calculating the compression-bending bearing capacity of L-shaped specially-shaped columns composed of concrete-filled square steel tubes with perfobond plate connection,and the integral calculation model should be adopted. The calculation results of CECS 159∶ 2004 specification and GJB 4142-2000 specification agree well with the test results.

关 键 词：方钢管混凝土 L形异形柱 单向压弯试验 计算方法 

分 类 号：TU398.9[建筑科学—结构工程]