(1 中国建筑西南设计研究院有限公司,成都 610041;2 浙江大学高性能结构研究所,杭州 310058;3 杭州铁木辛柯建筑结构设计事务所有限公司,杭州 311215)

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.

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

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2022)18-0145-06

DOI:10.19701 / j.jzjg.LZ2201

Understanding and application of design method for steel and steel-concrete combined structures:seismic performance-based design of steel structures

ZHOU Jia1,TONG Genshu2,LI Changhong1,LIU Yifeng1,ZHANG Lei2,FU Bo3

(1 China Southwest Architectural Design & Research Institute Co. ,Ltd. ,Chengdu 610041,China;2 Institute of High-Performace Structures,Zhejiang University,Hangzhou 310058,China;3 Hangzhou TONGMSK Architectural Structure Design Office Co. ,Ltd. ,Hangzhou 311215,China)

Abstract:The goal of structural seismic design is not broken in small earthquakes,repairable in medium earthquakes,andnot collapsing in large earthquakes. The structure enters the elasto-plastic stage under the medium earthquake,how toobtain the seismic force of the elasto-plastic stage structure is an urgent problem that needs to be solved. According to thedesign method for steel and steel-concrete combined structures,the refined theory for ductile ductility-based seismic design ofstructures,the various factors affecting the R-value of the structural coefficient of performance,and the relationship betweenstructural 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 theminimum value of the performance coefficient were described. Finally,suggestions were made for China's steel structuredesign standard ( GB 50017—2017 ) in terms of seismic performance-based design process,value of performancecoefficient,and limits of member width-thickness ratio.

Keywords:steel structure;ductility-based seismic design;performance-based design;coefficient of performance;second-order effect;width-thickness ratio

∗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).

第一作者:周佳,硕士,高级工程师,一级注册结构工程师,主要从事钢结构、组合结构和复杂结构的设计研究,Email:83294306@ qq. com.

[引用本文] 周佳,童根树,李常虹,等. «钢结构与钢-混凝土组合结构设计方法»的理解与应用———钢结构抗震性能化设计[J]. 建筑结构,2022,52(18):145-150. ZHOU Jia,TONG Genshu,LI Changhong,et al. Understanding andapplication of design method for steel and steel-concrete combined structures: seismic performance- based design of steelstructures[J]. Building Structure,2022,52(18):145-150.