Comparison of Seismic Design Provisions for Steel Building Structures between U.S. and Japan
Comparison of Seismic Design Provisions for Steel Building Structures between U.S. and Japan
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美国与日本钢结构建筑抗震设计规定比较
DOI：
10.11273/jssc1994.8.31_129
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发表时间：
2001
影响因子：
5.4
通讯作者：
C. Roeder
中科院分区：
文献类型：
--
作者：
M. Tada;Tomonori Fukui;M. Nakashima;C. Roeder
本文对美国和日本抗震设计规范中关于抗弯支撑钢框架的规定进行了研究。比较了宽厚比要求、支撑长度要求、结构分类、地震力折减系数和设计地震力，并讨论了异同。未折减的地震力在两个国家之间相对相似，但考虑到系统的延性，地震力折减系数存在显着差异。考虑地震力折减系数、支撑相对于框架的承载力、支撑的屈曲和屈曲后强度，对支撑框架的预期承载力进行了估算。日本支撑框架通常比相应的美国支撑框架更坚固，对于布置有中等长度支撑的框架，差异最明显。较大的设计地震力和日本规定中执行的较大地震力折减系数的组合是造成差异的原因。
This paper presents a study on the U.S. and Japanese seismic design provisionstipulated for moment resisting and braced steel frames. Width-to-thickness requirements, bracing length requirements, structural classification, seismic force reduction coefficients, and design seismic forces are compared, and differences and similarities are discussed. Unreduced seismic forces are relatively similar between the two countries but significant differences are present for the seismic force reduction coefficients that allow for the system ductility. Expected strength capacity of braced frames is estimated in consideration of seismic force reduction coefficients, strength carried by braces relative to frames, buckling and post-buckling strengths of braces. Japanese braced frames are generally stronger than the corresponding U.S. braced frames, with the difference most conspicuous for frames arranged with braces of medium lengths. A combination of larger design seismic forces and large seismic force reduction coefficiets enforced in the Japanese provisions are responsible for the difference.