中文摘要：

H形截面铝合金压弯构件的设计方法在工程中往往直接应用于T形截面构件,这一现状与后者的稳定性能并不相符。根据有限元方法对腹板端受压较大的T形截面铝合金压弯构件的平面内稳定承载力进行了参数分析。分析方法中考虑了材料非线性、几何非线性和初始缺陷的影响,对三种T形截面和两种典型合金类型（弱硬化合金和强硬化合金）进行了计算,并比较了GB 50429—2007《铝合金结构设计规范》推荐算式、文中建议公式和数值方法所得的计算结果。结果表明：GB 50429—2007推荐算式偏于安全较多,而文中提出的算式更为精确并足够安全。

英文摘要：

The design methods about H-section aluminium alloy beam-columns are often applied to T-section directly,and this situation is not consistent with the stability performance of the latter. Parameter analysis based on finite element methods was executed to study the in-plane stability capacity of extruded T-section aluminium beam-columns with the tip of the web in bigger compression. The analysis methods considered the effects of material nonlinearity,geometrical nonlinearity,and initial imperfection. The calculations of three kinds of T-sections of weak hardening alloy and strong hardening alloy were done,whose results were compared with those by GB 50429—2007,the proposed formula and numerical methods. The results showed that GB 50429—2007 was safe but overabundant,and the proposed formula is safe enough and more exact than the former.