(1 河北工业大学土木与交通学院， 天津 300401；2 廊坊师范学院建筑工程学院， 廊坊 065000)

［摘要］高层钢框架结构在水平荷载作用下，层间位移包含有害位移和无害位移两部分。在结构侧移的传统计算中，通常忽略P-Δ效应的影响；在二阶侧移计算中，也未从有害位移的角度进一步分析，这对较柔的高层钢框架结构来说会造成较大的误差。因此，针对这一问题，提出了高层钢框架结构考虑P-Δ效应影响的弹性层间有害位移的简化计算方法。通过采用简化方法和对角撑法对一个承受水平均布荷载的15层纯钢框架结构进行模拟计算对比，并讨论了P-Δ效应对层间有害位移的影响。结果表明提出的简化方法实用可行，能够很好地满足工程的实际需求。 

［关键词］高层钢框架结构；P-Δ效应；弹性层间有害位移；简化计算 

中图分类号：TU973+.2 文献标识码：A文章编号：1002-848X(2021)16-0064-05

Simplified calculation of elastic harmful inter-story drift of high-rise steel frame structure considering P-Δ effect 

PI  Fengmei1,2,  REN  Wenjie1,  CHEN  Bowen1,  ZHAO  Yue1 

(1 School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401， China；2 Institute of Architecture Civil Engineering, Langfang Normal University, Langfang 065000， China) 

Abstract:The inter-story drift of high-rise steel frame structure is composed of harmful drift and harmless drift under horizontal load. The influence of P-Δ effect is usually ignored in the traditional calculation of structural lateral displacement, and the harmful drift is not further analyzed in the calculation of second-order lateral displacement. It will produce larger error for the flexible high-rise steel frame structure. Therefore, in order to solve this problem, a simplified method of the elastic inter-story harmful drift of high-rise steel frame structure considering P-Δ effect was proposed. The results using the simplified method and the diagonal bracing method of a 15-story steel frame structure under horizontal uniform load were compared. And the influence of P-Δ effect on harmful drift was discussed. The results show that the simplified method is practical and feasible, and can well meet the actual needs of the project. 

Keywords:high-rise steel frame structure； P-Δ effect； elastic harmful inter-story drift； simplified calculation

*国家自然科学基金面上项目（51878240）。

 作者简介：皮凤梅，博士研究生，讲师，Email:  pyhwyb@126.com； 通信作者：任文杰，博士，教授，博士生导师，Email: rwjwlq@126.com。