基于Pushover方法的钢框架结构超强分析

英文篇名：An analysis of overstrength factors of steel frame based on Pushover
中文刊名：东北电力大学学报
英文刊名：Journal of Northeast Dianli University
作者：李东 ; 苏恒品
英文作者：LI Dong1 ; SU Heng-pin2 (1.Architecture Engineering College ; Northeast Dianli University ; Jilin Jilin 132012 ; 2.Guodian Northeast New Energy Development Co. ; Ltd ; Shenyang Liaoning 110027)
中文关键词：Pushover方法 ; 钢框架 ; 水平荷载分布模式 ; 超强
英文关键词：Steel frame ; Yield displacement ; Inter-drift ; pushover analysis ; Lateral load distribution mode
出版日期：2011-12-15
机构：东北电力大学建筑工程学院;国电东北新能源发展有限公司;
年：2011
期：Z1
出版单位：东北电力大学学报

摘要

基于我国抗震规范设计了6榀典型钢框架结构,并利用Pushover方法确定了结构的整体能力曲线,研究了层数、加载方式、设防烈度对钢框架结构超强的影响。结果表明随设防烈度提高、结构层数的增加,钢框架结构的超强系数呈降低趋势,水平荷载分布模式对钢框架结构的超强影响较大,结构超强能力的计算应考虑高阶振型影响。
Six plane steel frames were designed according to Chinese seismic code,the global capacity envelops of steel frames were obtained through pushover analysis.Overstrength factors of the structure were analyzed accounting for the story,lateral load distribution mode and seismic fortification intensity.The analysis results show that the overstrength factors decrease with the stories and seismic fortification intensity increasing.It is also found that lateral load distribution mode has large effect on the global capacity envelops,so the effect of high mode should be considered.

引文

[1]MARANDA E.Site-dependent strength reduction factors[J].Journal of Structural Engineering.1993,119(12):3503-3519.
    [2]KAPPOSA J.Evaluation of behavior factors on the basis of ductility and overstrength Studies[J].Engineering Structures.1999,21(9):823-835.
    [3]BORZI B,ELNASHA I A S.Refined force reduction factors for seismic design[J].Engineering Structures.2000,22(10):1244-1260.
    [4]韦锋,李刚强,白绍良.各国设计规范对基准设防地震和结构超强的考虑[J].重庆大学学报,2007,30(6):102-120.
    [5]翟长海,谢礼立.结构抗震设计中的强度折减系数研究进展[J].哈尔滨工业大学学报,2007,39(8):1177-1183.
    [6]童根树,赵永峰.中日欧美抗震规范结构影响系数的构成及其对塑性变形需求的影响[J].建筑钢结构进展,2008,10(5):52-63.
    [7]周靖,蔡健,方小丹.钢筋混凝土框架结构抗震超强系数分析[J].世界地震工程,2007,23(4):227-233.
    [8]翟长海,谢礼立.钢筋混凝土框架结构超强研究[J].建筑结构学报,2007,28(11):101-106.
    [9]刘文渊,何若全,冷捷.单层钢框架结构影响系数分析[J].苏州科技学院学报,2010,23(2):32-36.
    [10]周靖,蔡健,方小丹.剪切型结构的抗震强度折减系数研究[J].地震工程与工程振动,2008,28(2):64-71.
    [11]周靖,赵卫锋.建筑抗震设计地震作用折减系数的取值方法[J].防灾减灾工程学报,2007,27(4):465-469.