(1 同济大学，上海 200092； 2 福建工程学院，福州 350007)

［摘要］介绍了6个H型铝合金挤压型材偏心受压试件和1个轴心受压对比试件在一次加载下的试验研究，考察了长细比和荷载偏心率对铝合金压弯构件面外稳定承载力的影响，数值计算结果与试验结果吻合较好。根据铝合金材料的特点，分别对弱硬化合金和强硬化合金进行了铝合金压弯构件力学性能的理论分析。基于理论分析的结果，推导了计算H型铝合金压弯构件面外稳定承载力的相关公式。与数值计算结果的比较表明，相关公式采用直线形式将偏于安全。

［关键词］铝合金；H型；压弯构件；面外稳定承载力；相关公式

Experimental and theoretical research on lateral-torsional stability of H-section aluminum beam-columns

Zhang Zheng^1，2, Zhang Qilin¹(1 Tongji University, Shanghai 200092, China; 2 Fujian University of Technology, Fuzhou 350007, China)

Abstract:Stability tests on eccentrically compressed extruded H-section aluminum alloy beam-columns were carried out. Totally 6 beam-columns were tested, their out-plane stability behaviors were observed. By contrast, an axially compressed column was also tested. The main parameters varied in the tests are load eccentricity ratio and slenderness ratio. The numerical calculating results show good agreements with the tests results. On account of the characteristic material property of aluminum alloy, theoretical research on mechanical behavior of beam-columns is made for both weak hardening and strong hardening alloy. Based on the theoretical analysis results, interaction expression for checking the lateral-torsional stability resistance of aluminum alloy beam-columns is developed. Compared with numerical calculating results, it indicates that the calculated results of the expression will tend to safety when the expression adopts linear form.

Keywords:aluminum alloy; H-section; beam-column; out-plane stability resistance; interaction expression

建设部国家标准《铝合金结构设计规范》编制项目研究成果。

作者简介：张铮，副教授，博士，Email:frp-creep@sina.com。

参考文献

［1］Aluminum Association. Specification for aluminum structures［S］.1976.

［2］ECCS. European recommendations for aluminum alloy structures［S］. 1978.

［3］杨联萍, 姚念亮, 邱枕戈, 等. 铝合金轴心受压杆件的稳定系数研究［J］. 建筑结构, 2001, 31(4): 28-29.

［4］沈祖炎, 郭小农. 对称截面铝合金挤压型材压杆的稳定系数［J］. 建筑结构学报, 2001, 22(4): 31-36.

［5］金鑫. 单轴对称截面铝合金压杆极限承载力研究［D］. 上海：同济大学，2005.

［6］罗小燕, 王志骞, 王鹏军, 等. H形铝合金偏心压杆平面内稳定承载力研究［J］. 西安交通大学学报, 2004, 38(11): 1207-1210.

［7］吴亚舸. 铝合金受压板件局部屈曲与受弯构件弯扭屈曲承载力研究［D］. 上海：同济大学，2005.

［8］GB/T 228—2002 金属材料室温拉伸试验方法［S］. 北京：中国标准出版社, 2002.

［9］GB5237—2000 铝合金建筑型材［S］. 北京：中国标准出版社，2000.

［10］Aluminum association. Aluminum design manual: Specifications & guidelines for aluminum structures［S］. Washington, DC, 2000.

［11］CEN. prEN1999-1-1:2002, Design of aluminium structures-general structural rules［S］. 2002.

［12］FEDERICO M MAZZOLANI. Aluminium alloy structures［M］. 2nd ed. Chapman & Hall, London,1995.