摘要
系统地分析了三个主要参数(板高厚比λ、肋板刚度比η和柱刚度β)对钢板剪力墙弹性屈曲性能的影响;提出了钢板剪力墙的三种弹性屈曲形式(局部屈曲、整体屈曲和相关屈曲),指出肋板刚度比η=40时(相当于I s=3.7bt3)能保证十字加劲板发生小区格板的局部屈曲或整块板的相关屈曲;指出现行高层建筑钢结构规范用于纵横加劲板局部屈曲荷载的设计表达式仅适用于η≥40的条件,而在η<40范围内,其计算结果偏于不安全;研究了交叉加劲板的弹性屈曲荷载,并与非加劲板和十字加劲板的屈曲性能进行了比较;最终给出了柱刚度对弹性屈曲荷载的修正系数,提出了交叉加劲板弹性屈曲荷载的简化计算公式。
Elastic buckling behavior of two kinds of steel plate shear walls （SPSW） formed by cross stiffened panel and diagonal stiffened panel is investigated. Local buckling mode, overall buckling mode and their interaction are classified, depending on the stiffness ratio of stiffener to panel （η）. Elastic buckling analysis is carried out to reveal the inherent properties of SPSW. The analysis is related closely with three parameters, namely the panel slenderness ratio （ λ ）, the stiffness ratio of stiffener to panel （ η ）, and the column stiffness （β）. Results show that the current technical specification for steel structure of tall buildings （JGJ99-98） overpredicts the elastic buckling load when the stiffness ratio of stiffener to panel is less than 40. A modified coefficient for elastic buckling of the panel considering the influence of the column stiffness is proposed, and a simplified formula is given to predict the buckling load of the panel with diagonal stiffeners.
出处
《工程力学》
EI
CSCD
北大核心
2006年第2期84-91,59,共9页
Engineering Mechanics
关键词
钢板剪力墙
加劲肋
十字加劲板
交叉加劲板
弹性屈曲
steel plate shear wall
stiffener
cross stiffened panel
diagonal stiffened panel
elastic buckling behavior
