竖向加速度设计反应谱研究
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摘要
鉴于我国《建筑抗震设计规范》(GB 50011-2010)未给出竖向加速度反应谱表达式这一现状,本文收集292组美国地区的强震记录,研究了各种地震环境下不同结构阻尼比对谱比取值(V/H)的影响,针对场地等单一影响因素统计得出谱比平均值并采用遗传算法进行最优拟合。以场地因素上的拟合谱比为基准谱比,考虑震中距、阻尼等因素取修正以建立各地震环境下的谱比建议式。应用我国10抗震规范中水平加速度反应谱表达式和本文的谱比建议式,本文列举了一个示例地震环境,并推导出竖向加速度设计反应谱建议式,研究成果可供我国抗震规范参考。
According to the situation that Chinese "Earthquake Resistant Design Code"(GB50011-2010) does not rule the expression of vertical acceleration response spectrum,this paper collected hundreds of strong earthquake records in United States to study the influence of the factors such as seismic environment and structure damping ratio on the spectral ratio(V/H).The authors selects some influencing factors which has a great impact on the spectral ratios and the regularity is good,including site conditions,epicentral distance and structural damping ratio.Based on genetic algorithm(GA) programming,the global optimum fitting results were researched.The fitted spectral ratio with impact of site condition as the datum spectral ratio is taken.Simultaneously,the impact of epicentral distance and damping ratio,was carried on the revision to the datum spectral ratio,thus the suggestion type of the spectral ratio under various earthquakes environment was established.Finally,the horizontal acceleration design response spectra was stipulated by current seismic design code of China and multiplied by the suggestion type of the spectral ratio from corresponding earthquake environment,then the suggestion type of the vertical acceleration design response spectra from this earthquake environment is obtained.
According to the situation that Chinese "Earthquake Resistant Design Code"(GB50011-2010) does not rule the expression of vertical acceleration response spectrum,this paper collected hundreds of strong earthquake records in United States to study the influence of the factors such as seismic environment and structure damping ratio on the spectral ratio(V/H).The authors selects some influencing factors which has a great impact on the spectral ratios and the regularity is good,including site conditions,epicentral distance and structural damping ratio.Based on genetic algorithm(GA) programming,the global optimum fitting results were researched.The fitted spectral ratio with impact of site condition as the datum spectral ratio is taken.Simultaneously,the impact of epicentral distance and damping ratio,was carried on the revision to the datum spectral ratio,thus the suggestion type of the spectral ratio under various earthquakes environment was established.Finally,the horizontal acceleration design response spectra was stipulated by current seismic design code of China and multiplied by the suggestion type of the spectral ratio from corresponding earthquake environment,then the suggestion type of the vertical acceleration design response spectra from this earthquake environment is obtained.
引文
[1]GB 50011-2010,建筑抗震设计规范[S].
[2]耿淑伟,陶夏新.地震动加速度反应谱竖向分量与水平分量的比值[J].地震工程与工程振动,2004,24(5):33-38.
[3]高杰.竖向地震动加速度反应谱研究[D].武汉:华中科技大学,2009.
[4]胡贵强.多目标优化的遗传算法及其实现[J].重庆文理学院学报(自然科学版),2008,27(5):12-15.
[5]樊纪山,刘冠荣,王鲁,等.一种改进快速稳定的多目标优化算法[J].计算机应用研究,2007,24(4):52-53.
[6]徐龙军,谢礼立.竖向地震动加速度反应谱特性[J].地震工程与工程振动,2007,27(6):17-23.
[7]李小军,彭青.不同类别场地地震动参数的计算分析[J].地震工程与工程振动,2001,21(1):29-36.
[8]于靖.大跨结构竖向地震作用及对支承结构影响的研究[D].西安:西安建筑科技大学,2008.
[9]周正华,周雍年,卢滔,等.竖向地震动特征研究[J].地震工程与工程振动,2003,23(3):25-29.
[10]李晨,宁红云.改进的遗传算法选择算子[J].天津理工大学学报,2008,24(6):1-4.
[11]张永康.高层建筑体系竖向地震作用下的动力特性研究[D].西安:西北工业大学,2005.
[2]耿淑伟,陶夏新.地震动加速度反应谱竖向分量与水平分量的比值[J].地震工程与工程振动,2004,24(5):33-38.
[3]高杰.竖向地震动加速度反应谱研究[D].武汉:华中科技大学,2009.
[4]胡贵强.多目标优化的遗传算法及其实现[J].重庆文理学院学报(自然科学版),2008,27(5):12-15.
[5]樊纪山,刘冠荣,王鲁,等.一种改进快速稳定的多目标优化算法[J].计算机应用研究,2007,24(4):52-53.
[6]徐龙军,谢礼立.竖向地震动加速度反应谱特性[J].地震工程与工程振动,2007,27(6):17-23.
[7]李小军,彭青.不同类别场地地震动参数的计算分析[J].地震工程与工程振动,2001,21(1):29-36.
[8]于靖.大跨结构竖向地震作用及对支承结构影响的研究[D].西安:西安建筑科技大学,2008.
[9]周正华,周雍年,卢滔,等.竖向地震动特征研究[J].地震工程与工程振动,2003,23(3):25-29.
[10]李晨,宁红云.改进的遗传算法选择算子[J].天津理工大学学报,2008,24(6):1-4.
[11]张永康.高层建筑体系竖向地震作用下的动力特性研究[D].西安:西北工业大学,2005.
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