建筑结构

2012, v.42;No.337(01) 75-80

[打印本页] [关闭]
本期目录(Current Issue) | 过刊浏览(Past Issue) | 高级检索(Advanced Search)

《建筑抗震设计规范》在多高层钢结构房屋抗侧力构件连接计算规定中隐存的安全问题
Safety problems of lateral force resistance joint calculation about multi-story and tall steel structures in Code for seismic design of buildings

刘其祥;陈青来;陈幼璠;
Liu Qixiang1,Chen Qinglai2,Chen Youfan1(1 China Institute of Building Standard Design & Research,Beijing 100044,China; 2 Shandong University,Jinan 250061,China)

摘要(Abstract):

新颁布的《建筑抗震设计规范》(GB 50011—2010)在多高层钢结构房屋抗侧力构件连接计算规定中隐存的安全问题有:1)在表5.4.2的新规定中,把2001版抗震规范强制性条文中焊缝的承载力抗震调整系数γRwE由0.90降成了与梁的γRbE相同的0.75,使原要求的强连接降成了二者之间并无强弱关系的"等强连接";2)在8.2.8-1条中虽有弹性阶段"钢结构抗侧力构件连接的承载力设计值,不应小于相连构件的承载力设计值;高强度螺栓连接不得滑移"的规定,但在不同连接抗力条件下如何计算?并没有给出计算公式,而把连接计算全都放在了8.2.8-3~5条用极限承载力验算的方法上。经对该法的深入分析和验证,其结果却又不能满足8.2.8-1条连接抗力的必要条件,使规范中的极限承载力验算方法在抗侧力构件连接计算式中并不起控制作用,从而失去了它的验算价值,使"强连接弱构件"的基本原则在计算中并没有得到实施。
There are safety problems of lateral force resistance joint calculation about multi-story and tall steel structures in Code for seismic design of buildings(GB 50011—2010).In table 5.4.2,the seismic coefficient of welding seam γwRE reduced from 0.9(former code) to 0.75,which leads the joint strength no stronger but equal that may against the mandatory term.Although the stipulation in item 8.2.8-1 "design value of bearing capacity for lateral force resistance joint of steel structures,should not be lower than that of the connected component,and high strength bolt connection should not slip",we can only use the method in item 8.2.8-3~5 to check the calculation for making strong joint.But the result even cannot satisfy the essential condition of resistance connecting force,which makes the calculating method of the code about the ultimate bearing capacity for resisting lateral force member connections have no control function and lose its checking value.The basic principle of "the strength of connection should be stronger than that of component" in the calculating formula is not put into effect.

关键词(KeyWords): 钢结构;弱连接;等强连接;强连接;弱构件;强屈比;极限承载力
steel structure;weak joint;equal strength;strong joint;weak member;ratio of strength and yield;ultimate bearing capacity

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘其祥;陈青来;陈幼璠;
Liu Qixiang1,Chen Qinglai2,Chen Youfan1(1 China Institute of Building Standard Design & Research,Beijing 100044,China; 2 Shandong University,Jinan 250061,China)

Email:

DOI: 10.19701/j.jzjg.2012.01.015

扩展功能
本文信息
服务与反馈
本文关键词相关文章
本文作者相关文章
中国知网
分享