H形截面铝合金压弯构件平面内稳定承载力的试验及理论研究  

Experimental and theoretical research on in-plane stability capacity of H-section aluminum beam-columns

作　　者：张铮[1] 张其林[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《建筑结构学报》2006年第5期9-15,共7页Journal of Building Structures

基　　金：国家标准<铝合金结构设计规范>编制研究项目

摘　　要：以长细比和荷载偏心率为主要参数,测试了13个H形截面铝合金挤压型材偏心受压试件的稳定承载力,所有试件均在受弯平面内发生了整体弯曲屈曲。采用数值方法对上述试件进行了非线性稳定性计算,计算结果得到了试验结果的验证。对铝合金压弯构件的稳定性进行了理论分析,结果表明合金类型对稳定承载力的影响最大,修正系数η1需要对弱硬化合金和强硬化合金分别取值。推导的计算H形截面铝合金压弯构件平面内稳定承载力的线性相关公式与数值计算结果吻合较好,并在形式上与我国《钢结构设计规范》(GB 50017—2003)保持一致以便于实际应用。Stabihty tests were conducted on eccentrically loaded extruded H-section aluminum columns. The main parameters included in the tests were slenderness ratio and eccentricity ratio. All those 13 specimens were twisted by overall flexural buckling in the plane of the applied bending moment. Numerical methods were used to analyze the nonlinear stability of the specimens. The theoretical predictions were verified by comparison with experimental results. The analytical results show that the stability of aluminum beam-columns is greatly affected by the types of aluminum alloys, and the modification coefficient η1 should be chosen respectively based on weak hardening and strong hardening alloy. Linear interaction expression for checking the in-plane stabihty capacity of H-section aluminum beam-columns is proposed. The calculated results of the expression show agreements with those of numerical methods and the form of the expression is in line with ＂Code for design of steel structures （ GB 50017--2003）＂.

关 键 词：铝合金压弯构件 H形截面 平面内稳定承载力 相关公式 

分 类 号：TU395[建筑科学—结构工程]