基于二维相干性自锚式悬索桥的地震响应研究
|
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,但垂直于地震波传播方向两点距离较远(如横桥向)时,会存在相干性。本文基于二维相干模型,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桥址处各支点的人工地震波。利用该地震波研究不同激励方式对自锚式悬索桥结构的地震响应,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 the 1D-coherence model is used to simulate seismic excitation,that means only a variation which travels along the direction of seismic wave is considered.However,when the distance between two points,which are at vertical direction to the wave way,is some long(e.g.at both side of a bridge),the coherence appears.In this paper,based on 2D-coherence model,using the triangular series method,considering the effect of frequency to wave velocity and the effect of seismic wave lag to non-uniformly modulation function,the artificial seismic wave is formed to every support of a self-anchored suspension bridge.The wave is used to research the seismic responses of the bridge structure in different excitation way.The result is compared with the result of 1D-coherence,and from comparing some valued conclusions are gained.
Usually the 1D-coherence model is used to simulate seismic excitation,that means only a variation which travels along the direction of seismic wave is considered.However,when the distance between two points,which are at vertical direction to the wave way,is some long(e.g.at both side of a bridge),the coherence appears.In this paper,based on 2D-coherence model,using the triangular series method,considering the effect of frequency to wave velocity and the effect of seismic wave lag to non-uniformly modulation function,the artificial seismic wave is formed to every support of a self-anchored suspension bridge.The wave is used to research the seismic responses of the bridge structure in different excitation way.The result is compared with the result of 1D-coherence,and from comparing some valued conclusions are gained.
引文
[1]秋仁东,石玉成,徐瞬华,等.预应力锚索加固石窟岩体的地震动力响应研究[J].西北地震学报,2007,29(1):49-53.
[2]李兴田,朱东生.连续梁桥中设置粘弹性阻尼器的减震效果分析[J].西北地震学报,2006,28(1):26-30.
[3]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.
[4]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,2003:773-118.
[5]张哲.混凝土自锚式悬索桥[M].北京:人民交通出版社,2005:64-108.
[6]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.
[7]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.
[8]Hong Hao.Arch response to correlate multiple excitations[J].EESD,1993,22:389-404.
[9]欧进萍,王光远.结构随机振动[M].北京:高等教育出版社,1998:121-130.
[10]董娣,刘锐,桑向国.随机方法模拟地震动的研究[J].西北地震学报,2006,28(4):298-302.
[11]梁建文.非平稳地震动过程模拟方法(Ⅱ)[J].地震学报,2005,27(3):346-351.
[12]郭子雄,王妙芳.人造地震动合成的研究现状和展望[J].华侨大学学报(自然科学版),2006,27(1):7-11.
[13]Shinozuka M,Deodatis G.Stochastic Process Methods for Earth-quake Ground Motion[J].Probabilistic Engineering Mechanics,1988,13(3):114-123.
[14]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.
[15]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.
[16]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.
[17]屈铁军,王前信.空间多点地震动合成(Ⅰ)基本公式[J].地震工程与工程振动,1998,18(1):8-15.
[18]钟菊芳,胡晓,屈铁军,等.竖向地震动强度包络函数的空间变化规律[J].西北地震学报,2005,27(1):42-46.
[19]屈铁军,王前信.空间多点地震动合成(Ⅱ)合成实例[J].地震工程与工程振动,1998,18(2):25-32.
[20]MAmin,A H-S Ang.Nonstationary Stochastic Model of Earth-quake Motions[J].ASCE,1968,94(2):343-360.
[21]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]∥2006钢桥科技论坛全国学术会议交流论文集[C].大连:[s.n.],2006:46-59.
[22]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.
[2]李兴田,朱东生.连续梁桥中设置粘弹性阻尼器的减震效果分析[J].西北地震学报,2006,28(1):26-30.
[3]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.
[4]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,2003:773-118.
[5]张哲.混凝土自锚式悬索桥[M].北京:人民交通出版社,2005:64-108.
[6]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.
[7]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.
[8]Hong Hao.Arch response to correlate multiple excitations[J].EESD,1993,22:389-404.
[9]欧进萍,王光远.结构随机振动[M].北京:高等教育出版社,1998:121-130.
[10]董娣,刘锐,桑向国.随机方法模拟地震动的研究[J].西北地震学报,2006,28(4):298-302.
[11]梁建文.非平稳地震动过程模拟方法(Ⅱ)[J].地震学报,2005,27(3):346-351.
[12]郭子雄,王妙芳.人造地震动合成的研究现状和展望[J].华侨大学学报(自然科学版),2006,27(1):7-11.
[13]Shinozuka M,Deodatis G.Stochastic Process Methods for Earth-quake Ground Motion[J].Probabilistic Engineering Mechanics,1988,13(3):114-123.
[14]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.
[15]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.
[16]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.
[17]屈铁军,王前信.空间多点地震动合成(Ⅰ)基本公式[J].地震工程与工程振动,1998,18(1):8-15.
[18]钟菊芳,胡晓,屈铁军,等.竖向地震动强度包络函数的空间变化规律[J].西北地震学报,2005,27(1):42-46.
[19]屈铁军,王前信.空间多点地震动合成(Ⅱ)合成实例[J].地震工程与工程振动,1998,18(2):25-32.
[20]MAmin,A H-S Ang.Nonstationary Stochastic Model of Earth-quake Motions[J].ASCE,1968,94(2):343-360.
[21]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]∥2006钢桥科技论坛全国学术会议交流论文集[C].大连:[s.n.],2006:46-59.
[22]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.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心