- 摘 要
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(新疆大学建筑工程学院, 乌鲁木齐 830047)
[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。 CECS 159∶2004规程和GJB 4142—2000规程的计算结果与试验结果吻合良好。
[关键词]方钢管混凝土; L形异形柱; 单向压弯试验; 计算方法
中图分类号:TU398+.1 文献标识码:A 文章编号:1002-848X(2015)08-0069-05
Research on unidirectional compressionbending stability of L-shaped specially-shaped column composed of concretefilled square steel tube
Zhang Guangtai, Li Fengbin, Rong Bin
(College of Architectural and Civil Engineering, Xinjiang University, Urumqi 830047, China)
Abstract:Based on the analysis of the stress of unidirectional compressionbending components, Lshaped speciallyshaped columns composed of concretefilled square steel tubes under unidirectional compressionbending loading were designed. Through the compressionbending experiment, failure modes, curves of loading and vertical displacement, deflection curves and loadingstrain curves for singlelimb 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 compressionbending bearing capacity of the component should not be ignored when calculating the compressionbending bearing capacity of Lshaped speciallyshaped columns composed of concretefilled 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 41422000 specification agree well with the test results.
Keywords:concretefilled square steel tube; Lshaped speciallyshaped column; unidirectional compressionbending experiment; calculation method
*新疆维吾尔自治区自然科学基金资助项目(2012331464)。
作者简介:张广泰,教授,硕士生导师,Email:zgtlxh@126.com。
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