摘要
在详细阐述新钢规GB 50017-2017与美标ANSI/AISC 360-10稳定性设计方法的基础上,对新钢规GB 50017-2017与美标ANSI/AISC 360-10的稳定性设计方法进行了对比探讨.主要结论有:国标新钢规与美标在结构分析层面均系统地考虑了二阶效应的相关问题,但两者的基准点不同,国标新钢规将一阶弹性分析法作为常用的分析方法,而美标则将直接分析法(DM)作为推荐的分析方法;国标新钢规在一阶弹性分析法的基础上,当结构分析考虑P-Δ效应后,K值取1.0,P-δ效应在构件验算层面解决,即二阶弹性P-Δ分析法;当结构分析考虑P-Δ及P-δ效应后,构件层面不再计算轴心受压稳定承载力,即直接分析设计法;美标在直接分析法(DM)的基础上,当刚度不折减时,K按列线图计算构件稳定承载力,即有效长度法(ELM);当不考虑P-δ效应、对P-Δ效应的假想水平力进行放大后,K按列线图计算构件稳定承载力,即一阶分析法;在进行钢结构设计时,无论采用国标新钢规或是美标,结构稳定分析方法与构件设计须在一套规范体系内配套使用.
After elaborated on the stability design methods of China national standard GB 50017-2017 and American standard ANSI/AISC 360-10,the stability design methods of national standard GB 50017-2017 and American standard ANSI/AISC 360-10 are compared and discussed.The main conclusions are drawn as follows.China national standards and American standards systematically consider the related issues of second-order effects at the structural analysis level;but the reference points for the two are different;the China national standard is based on the first-order elastic analysis method,when structural analysis considers the P-Δeffect.The value of K is 1.0.The P-δeffect is solved at the component verification level;i.e.the second-order elastic P-Δanalysis.When the structural analysis considers the effects of P-Δand P-δ,the axial bearing capacity is no longer calculated at the component level,i.e.the direct analysis method.American standard on the basis of the direct analysis method(DM),when the stiffness is not reduced,K according to the nomogram to calculate the structural bearing capacity,i.e.the effective length method(ELM);when not considering P-δafter the effect and the imaginary horizontal force of the P-Δeffect are amplified;K calculates the structural stability bearing capacity according to the nomogram,that is,the first-order analysis method;in the steel structure design,regardless of whether the national standard or American standard is used,the structural stability analysis method and component design methods must be used within a set of specifications.
作者
黄慧
朱帆
高标
沈涛
HUANG Hui;ZHU Fan;GAO Biao;SHEN Tao(Jiangsu Electric Power Design Institute Co.,Ltd.,China Energy Engineering Group,Nanjing 211102,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2018年第A01期98-101,共4页
Engineering Journal of Wuhan University
