基于二维相干性自锚悬索桥非一致激励地震响应分析

英文篇名：Analysis of Seismic Responses with Non-uniform Excitations of Self-anchored Suspension Bridge Based on a 2D-coherence Model
中文刊名：中南林业科技大学学报
英文刊名：Journal of Central South University of Forestry & Technology
作者：李杰 ; 郑凯锋 ; 李娜
英文作者：LI Jie1 ; ZHENG Kai-feng2 ; LI Na1 (1.School of Civil Engineering ; Zhengzhou University ; Zhengzhou 450001 ; Henan ; China ; 2.School of Civil Engineering ; Southwest Jiaotong University ; Chengdu 610031 ; Sichuan ; China)
中文关键词：桥梁工程 ; 自锚式悬索桥 ; 二维相干性 ; 人工地震波 ; 大质量法 ; 非一致激励
英文关键词：bridge engineering ; self-anchored suspension bridge ; 2D-coherence model ; artificial seismic wave ; great mass method ; non-uniform excitations
出版日期：2008-06-15
机构：郑州大学土木工程学院;西南交通大学土木工程学院;
年：2008
期：03
出版单位：中南林业科技大学学报

摘要

一般在非一致地震激励的模拟中采用一维相干模型,即模型中只含有沿地震波传播方向的变量,当垂直于地震波传播方向两点距离较远(如横桥向),则支点间的相干性对地震响应有一定影响.基于二维相干模型,应用三角级数法,考虑频率对视波速的影响、地震波传播滞后对非平稳调制函数的影响,生成某自锚式悬索桥各支点的人工地震波.利用该地震波,应用大质量法对自锚式悬索桥非线性地震响应进行时程分析,分别考虑几何非线性、材料非线性的影响,研究不同激励作用下结构的响应,并与基于一维相干的地震响应结果进行了对比,从中得到一些有意义的结论.
Usually a seismic excitation,including only one variation which travels along a seismic wave motion,is simulated on a 1D-coherence model.However,when two excitation points have a distance in between(e.g.a lateral bridge),which are vertical to the seismic wave,they influence each other.Based on a 2D-coherence model,this paper,employing the method of triangular series,analyzes the effect of frequency on wave velocity,the effect of seismic wave lag on non-uniformly modulation and the function to simulate artificial seismic waves at the very support of a self-anchored suspension.With the help of these waves,the paper, considering geometric and material nonlinear influences and using the great mass method,analyzes the seismic time-history responses of the self-anchored suspension bridge and explores its different responses under different excitations. After a comparison with the results on the 1D-coherence model,it finally obtains some valuable conclusions.

引文

[1]刘春城,张哲,石磊.虚拟激励法在自锚式悬索桥竖向地震反应分析中的应用[J].东南大学学报(自然科学版),2003,33(4):522-525.
    [2]刘春城.混凝土自锚式悬索桥三维地震反应研究[D].大连:大连理工大学,2003.73-118.
    [3]张哲.混凝土自锚式悬索桥[M].北京:人民交通出版社,2005.64-108.
    [4]杨孟刚,胡建华,陈政清.独塔自锚式悬索桥地震响应分析[J].中南大学学报(自然科学版),2005,36(1):133-137.
    [5]杨孟刚.磁流变阻尼器在大跨度桥梁上的减震理论研究[D].长沙:中南大学,2004.38-50.
    [6]赵灿晖.大跨度钢管混凝土拱桥地震响应研究[D].成都:西南交通大学,2001.73-126.
    [7]Hong Hao.Arch response to correlate multiple excitations[J].EESD,1993,22:389-404.
    [8]Shinozuka M,Deodatis G.Stochastic Process Methods for Earthquake Ground Motion[J].Probabilistic Engineering Mechanics,1988,(3):114-123.
    [9]杜修力,陈厚群.地震动随机模拟及其参数确定方法[J].地震工程与工程振动,1994,14(4):1-5.
    [10]杜修力,胡晓,陈厚群.强震地运动随机过程模拟[J].地震学报,1995,17(1):103-109.
    [11]陈仁福.大跨悬索桥理论[M].成都:西南交通大学出版社,1994.103-135.
    [12]屈铁军,王前信.空间多点地震动合成()基本公式[J].地震工程与工程振动,1998,18(1):8-15.
    [13]屈铁军,王前信.空间多点地震动合成()合成实例[J].地震工程与工程振动,1998,18(2):25-32.
    [14]M Amin,A H-S Ang.Nonstationary Stochastic Model of Earthquake Motions[J].ASCE,1968,94(2):.
    [15]秦权,孙晓燕,贺瑞,等.特大跨钢桥对非一致地震地面运动的反应和人工波质量[A].北京:2006钢桥科技论坛全国学术会议交流论文集[C],2006,(12):46-59.
    [16]李杰.自锚式悬索桥非线性时程响应分析和简化方法研究[D].成都:西南交通大学,2007.55-98.