钢框架-中心支撑结构设计对比分析
|
摘要
在阐述了各国规范有关框架-中心支撑结构设计方法的基础上,对中国、美国和欧洲现行框架-中心支撑结构设计规范进行了分析和比较。分析可见,除JGJ99外,各国规范在进行框架横梁设计时,均考虑了V形和人字形钢支撑受压斜杆整体屈曲后,在横梁跨中产生不平衡竖向力对框架梁的不利影响。为了避免钢支撑破坏后结构倒塌,中国和美国相关规范人为地加强了框架-中心支撑体系中框架抗剪能力的比例,而该措施对框架-中心支撑体系是否能够真正起到防止整体结构倒塌的作用,尚存在一些争议。
On the basis of assessment on the design methodology of concentrically braced frame(CBF),the analysis and comparison of the Chinese,American and European related codes about the design method of CBF are carried out.It is found that,besides the JGJ99 code,all codes adjust the section of intersection beam of V-CBF and Inverted-V-CBF to prevent undesirable deterioration of unbalanced vertical force on the intersecting beam.In order to prevent the whole building collapsing after bracing member being broken,the Chinese and American related codes pay particular attention to increase the capability of shear resistance of moment resisting frames.However,there are some differences in the effect of this method.
On the basis of assessment on the design methodology of concentrically braced frame(CBF),the analysis and comparison of the Chinese,American and European related codes about the design method of CBF are carried out.It is found that,besides the JGJ99 code,all codes adjust the section of intersection beam of V-CBF and Inverted-V-CBF to prevent undesirable deterioration of unbalanced vertical force on the intersecting beam.In order to prevent the whole building collapsing after bracing member being broken,the Chinese and American related codes pay particular attention to increase the capability of shear resistance of moment resisting frames.However,there are some differences in the effect of this method.
引文
[1]D C Rai,S C Goel.Seismic evaluation and upgrading of chevronbraced frames[J].Journal of constructional steel research,2003,59(8):971-994.
[2]钢支撑及框架-中心支撑双重抗侧力体系研究现状、不足及改进[J].地震工程与工程振动,2005,25(3):67-75.
[3]Seismic Provisions for Structural Steel Buildings-2002[S].
[4]Uniform Building Code-1997[S].
[5]Eurcode 8(draft 6)-2003[S].
[6]蔡益燕.高层民用建筑钢结构技术规程修订雏议[J].建筑钢结构进展,2003,5(4):1-4.
[2]钢支撑及框架-中心支撑双重抗侧力体系研究现状、不足及改进[J].地震工程与工程振动,2005,25(3):67-75.
[3]Seismic Provisions for Structural Steel Buildings-2002[S].
[4]Uniform Building Code-1997[S].
[5]Eurcode 8(draft 6)-2003[S].
[6]蔡益燕.高层民用建筑钢结构技术规程修订雏议[J].建筑钢结构进展,2003,5(4):1-4.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心