不同设计基准期下地震动峰值加速度取值分析
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摘要
为了得到大跨度桥梁抗震设计中采用高于抗震规范设计基准期时的地震动参数,通过烈度建立设计基准期与地震动峰值加速度之间的联系,运用经验公式分析了不同设计基准期下地震动对峰值加速度的表现规律,并与现有抗震设计规范就设计基准期为50年概率水平下的取值做了对比分析,通过实桥的地震安全性评价数据验证了该方法在设计基准期为100年概率水平下计算结果的可靠性。
In order to obtain the values of ground motion parameters that are higher than the values in the design reference period stipulated in the seismic specifications for the seismic design of long span bridges,the correlation between the design reference period and the peak ground motion acceleration was established based on seismic intensity,and the performance pattern of peak ground motion acceleration in different design reference period was analyzed via empirical formula,and the results of the analysis were compared with the values drawn in accordance with the probability level of a 50-year design reference period in the current seismic design specifications.In addition,on the basis of the seismic safety evaluation data of actual bridges,the reliability of the calculated results of probability level of a 100-year design reference period obtained by this method was verified.
In order to obtain the values of ground motion parameters that are higher than the values in the design reference period stipulated in the seismic specifications for the seismic design of long span bridges,the correlation between the design reference period and the peak ground motion acceleration was established based on seismic intensity,and the performance pattern of peak ground motion acceleration in different design reference period was analyzed via empirical formula,and the results of the analysis were compared with the values drawn in accordance with the probability level of a 50-year design reference period in the current seismic design specifications.In addition,on the basis of the seismic safety evaluation data of actual bridges,the reliability of the calculated results of probability level of a 100-year design reference period obtained by this method was verified.
引文
[1]马玉宏,赵桂峰,谢礼立,等.重要性不同的现有结构抗震加固设计地震动参数研究[J].地震工程与工程振动,2008,(5):43-48.
[2]李龙安,何友娣,屈爱平.公路桥梁抗震设计的设防标准研究[J].桥梁建设,2006,(S2):135-139.
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[4]叶爱君,范立础.大型桥梁工程的抗震设防标准探讨[J].地震工程与工程振动,2006,26(2):8-12.
[5]张树生,张显恩.不同设计基准期地震动参数取值[J].工程建设,2007,39(5):19-23.
[6]周泳涛,刘延芳,鲍卫刚.新、旧桥梁抗震设计规范实桥计算比较[J].世界桥梁,2010,(3):28-31.
[7]沈聚敏.抗震工程学[M].北京:中国建筑工业出版社,2004.
[8]周行人,刘海波,胡建华.高烈度区高墩桥梁抗震措施研究[J].桥梁建设,2011,(2):42-45,49.
[9]袁贤讯,潘芹.设计基准期、设计工作寿命及重要性系数间的关系[J].建筑结构,2005,39(10):17-20.
[10]高玉峰,张健.地震危险性分析研究[M].北京:科学出版社,2007.
[11]龚思礼.建筑抗震设计手册[M].北京:中国建筑工业出版社,2002.
[2]李龙安,何友娣,屈爱平.公路桥梁抗震设计的设防标准研究[J].桥梁建设,2006,(S2):135-139.
[3]石树中,余湛,沈建文.中外重大工程抗震设防标准的确定[J].国际地震动态.2008,(10):28-32.
[4]叶爱君,范立础.大型桥梁工程的抗震设防标准探讨[J].地震工程与工程振动,2006,26(2):8-12.
[5]张树生,张显恩.不同设计基准期地震动参数取值[J].工程建设,2007,39(5):19-23.
[6]周泳涛,刘延芳,鲍卫刚.新、旧桥梁抗震设计规范实桥计算比较[J].世界桥梁,2010,(3):28-31.
[7]沈聚敏.抗震工程学[M].北京:中国建筑工业出版社,2004.
[8]周行人,刘海波,胡建华.高烈度区高墩桥梁抗震措施研究[J].桥梁建设,2011,(2):42-45,49.
[9]袁贤讯,潘芹.设计基准期、设计工作寿命及重要性系数间的关系[J].建筑结构,2005,39(10):17-20.
[10]高玉峰,张健.地震危险性分析研究[M].北京:科学出版社,2007.
[11]龚思礼.建筑抗震设计手册[M].北京:中国建筑工业出版社,2002.
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