国际期刊导读  

出　　处：《钢结构》2014年第10期79-87,99,共10页Steel Construction

摘　　要：1 I型钢梁塑性耦合稳定性 摘要：研究I型梁的塑性稳定性，为保证塑性或抗震设计时I型梁的延性，其转动特性十分重要。I型梁失效，可能是偏心压缩作用下受压翼缘和腹板出现平面内或平面外局部屈曲，或者同时出现两种局部屈曲模式。为研究梁的塑性屈曲性能，确定其满足塑性或抗震设计要求的转动能力，给出了其塑性倒塌机制，并采用DUCTROT-M软件进行分析。参数分析表明，欧洲热轧截面的腹板高厚比以及平面外屈曲性能十分重要。Plastic Coupled Instabilities of I-Shaped Steel Beams Abstract： The paper presents the case of plastic instability of I-shaped beams where the rotation capacity is a very im- portant characteristic in order to assure the required ductili- ty in plastic or seismic design. The failure of such beams can be due to the local plastic plate buckling of compression flange and local plate buckling of the web in flexural com- pression, produced in-plane or out-of-plane. In the same time the failure can occurs by coupling of these two local buckling modes. In order to study the plastic buckling of beams and to determine the available rotation capacity which is required by the plastic or seismic design, the col- lapse plastic mechanism theory was developed and a spe- cialized computer program DUCTROT-M was elaborated. The parametrical analysis reveals the paramount importance of the web to thickness ratio and furthermore the sensitivity in out-of-plane buckling of the European hot-rolled sections.

关 键 词：国际期刊 耦合稳定性 导读 局部屈曲 屈曲性能 抗震设计 I型梁 受压翼缘 

分 类 号：TU3-5[建筑科学—结构工程]