基于结构抗震可靠性公式的谱密度值分析
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摘要
针对已提出的基于概率烈度的地面加速度峰值分布的结构抗震可靠性分析方法,对地震动输入模型进行选择.采用了考虑地面运动开始、强震、衰减全过程的修正地震动模型,提出了计算离散性地面加速度对应的谱密度值的方法.分析谱密度值对场地条件以及地面峰值加速度变化的敏感性,为进一步进行结构随机地震响应分析和结构失效概率计算提供依据.
The ground motion input model was been analyzed in this paper according to the structure seismic reliability analysis method.This method was put forward basing on the ground peak accele ration distribution which relates to seismic intensity probability.This article adopts the modified ground motion model which considered the whole process including the beginning,the strong earthquake and the attenuation process.The way to calculate spectral density value relevant to discrete ground accele ration is introduce in this paper.The sensitivities of the spectral density value to field condition and the ground peak acceleration changes was also discussed in this article.That is a basic work for the further stochastic seismic response analysis and the structural failure probability calculation.
The ground motion input model was been analyzed in this paper according to the structure seismic reliability analysis method.This method was put forward basing on the ground peak accele ration distribution which relates to seismic intensity probability.This article adopts the modified ground motion model which considered the whole process including the beginning,the strong earthquake and the attenuation process.The way to calculate spectral density value relevant to discrete ground accele ration is introduce in this paper.The sensitivities of the spectral density value to field condition and the ground peak acceleration changes was also discussed in this article.That is a basic work for the further stochastic seismic response analysis and the structural failure probability calculation.
引文
[1]王光远.在非平稳强地震作用下的结构反应的分析方法[J].土木工程学报,1964,10(1):14-22.
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[4]杨伟军,林立,杨春侠.混凝土多孔砖砌体房屋抗震可靠度分析[J].工程力学,2007,10(24):100-104.
[5]Kanai K.An empirical formula for the spectrum of strong earthquake motions[J].Bull Earthq Res Inst,1961,39:85-95.
[6]李桂青,李秋胜.工程结构时变可靠度理论及其应用[M].北京:科学出版社,2001.
[7]江近仁,洪峰.多层砖房的地震可靠性分析[J].地震工程与工程振动,1985,5(4):13-28.
[8]洪峰,江近仁,李玉亭.地震地面运动的功率谱模型及其参数的确定[J].地震工程与工程振动,1994,14(2):46-52.
[2]欧进萍,王光远.结构随机振动[M].北京:高等教育出版社,1998.
[3]欧进萍,牛荻涛,杜修力.设计用随机地震动的模型及其参数确定[J].地震工程与工程振动,1991,11(3):45-53.
[4]杨伟军,林立,杨春侠.混凝土多孔砖砌体房屋抗震可靠度分析[J].工程力学,2007,10(24):100-104.
[5]Kanai K.An empirical formula for the spectrum of strong earthquake motions[J].Bull Earthq Res Inst,1961,39:85-95.
[6]李桂青,李秋胜.工程结构时变可靠度理论及其应用[M].北京:科学出版社,2001.
[7]江近仁,洪峰.多层砖房的地震可靠性分析[J].地震工程与工程振动,1985,5(4):13-28.
[8]洪峰,江近仁,李玉亭.地震地面运动的功率谱模型及其参数的确定[J].地震工程与工程振动,1994,14(2):46-52.
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