摘要
结构抗震设计的目标是小震不坏、中震可修、大震不倒,中震下结构进入弹塑性阶段,弹塑性阶段结构的地震力如何求得,是亟需解决的问题。根据《钢结构与钢-混凝土组合结构设计方法》,详细介绍了精细化延性抗震设计理论,影响结构性能系数R取值的各种因素,结构延性系数与构件宽厚比的关系。介绍了采用《钢结构设计标准》(GB 50017-2017)进行抗震性能化设计的流程,及性能系数最小值的确定依据。最后对我国《钢结构设计标准》(GB 50017-2017)在抗震性能化设计流程、性能系数的取值、构件宽厚比限值等方面提出了建议。
The goal of structural seismic design is not broken in small earthquakes, repairable in medium earthquakes, and not collapsing in large earthquakes. The structure enters the elasto-plastic stage under the medium earthquake, how to obtain the seismic force of the elasto-plastic stage structure is an urgent problem that needs to be solved. According to the design method for steel and steel-concrete combined structures, the refined theory for ductile ductility-based seismic design of structures, the various factors affecting the R-value of the structural coefficient of performance, and the relationship between structural ductility coefficient and member width-to-thickness ratio were introduced in detail. The seismic performance-based design process using the steel structure design standard(GB 50017-2017)and the basis for determining the minimum value of the performance coefficient were described. Finally, suggestions were made for China’s steel structure design standard(GB 50017-2017)in terms of seismic performance-based design process, value of performance coefficient, and limits of member width-thickness ratio.
作者
周佳
童根树
李常虹
刘宜丰
张磊
付波
ZHOU Jia;TONG Genshu;LI Changhong;LIU Yifeng;ZHANG Lei;FU Bo(China Southwest Architectural Design&Research Institute Co.,Ltd.,Chengdu 610041,China;Institute of High-Performace Structures,Zhejiang University,Hangzhou 310058,China;Hangzhou TONGMSK Architectural Structure Design Office Co.,Ltd,Hangzhou 311215,China)
出处
《建筑结构》
CSCD
北大核心
2022年第18期145-150,共6页
Building Structure
基金
中国建筑西南设计研究院有限公司重点课题(R-2021-08-S-A-2023)
浙江省建设科研项目(2021K091)。
关键词
钢结构
延性抗震设计
性能化设计
性能系数
二阶效应
宽厚比
steel structure
ductility-based seismic design
performance-based design
coefficient of performance
second-order effect
width-thickness ratio
