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(重庆大学 土木工程学院;山地城镇建设与新技术教育部重点实验室)；李正良(重庆大学 土木工程学院;山地城镇建设与新技术教育部重点实验室)
Author：Liu Hongjun(College of Civil Eng.,Chongqing Univ.;Key Lab. of Ministry of Education of New Technol. for Construction of Cities in Mountain Area)；Li Zhengliang(College of Civil Eng.,Chongqing Univ.;Key Lab. of Ministry of Education of New Technol. for Construction of Cities in Mountain Area)
收稿日期：2011-06-07 年卷（期）页码：2012,44(1):63-68
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：双角钢；十字组合截面；偏心；极限承载力；填板
Key words：double angles;combined cross-section;eccentric;ultimate strength;filled plate
基金项目：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）
中文摘要
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。
英文摘要
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.
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