双角钢十字组合截面偏心压杆承载力研究  

Study on Ultimate Strength of Eccentric Compression Members with Combined Angle Iron Cross-section

作　　者：刘红军[1,2] 李正良[1,2] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]山地城镇建设与新技术教育部重点实验室,重庆400045

出　　处：《四川大学学报（工程科学版）》2012年第1期63-68,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(51078367);中央高校基本科研业务费资助项目(CDJRC10200016)

摘　　要：输电工程中输电塔主材通常采用双角钢十字组合截面的方式,其受力情况非常复杂。通过对12组双角钢十字组合截面偏心压杆的足尺试验和有限元分析,考察了单节间和双节间压杆的受力性能和破坏模式,并利用多参数有限元分析了宽厚比、长细比以及填板数量和布置方式等主要参数对压杆承载力的影响,提出了其组合截面承载力计算方法,并与试验和有限元所得的结果进行了比较。结果表明,基于偏心的双角钢十字组合截面压杆建议的计算方法合理有效,具有较好的适用性。The members with combined angle iron cross-section are widely used in electric transmission towers and its behavior is complex.Twelve groups full-scale tests and the finite element analysis were conducted to study the compressive behavior of eccentric members with combined angle iron cross-section,and the buckling failure mode and behavior of test specimens of single inter-node and double inter-node were observed.The effects of width-thickness ratio,slenderness ratio and the number and distribution of filled plate on the ultimate strength were analyzed and the design method of members with combined angle iron cross-section was put forward and compared with the result of experimentation and FEM.The results showed that the method has theoretical and practical significance for design.

关 键 词：双角钢 十字组合截面 偏心 极限承载力 填板 

分 类 号：TU392.3[建筑科学—结构工程]