场地卓越周期的计算及其工程应用
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摘要
场地卓越周期是场地土地震动力特性的重要参数,总结了不同规范对场地卓越周期的定义,阐述了卓越周期在工程抗震中的应用、计算方法及其优缺点。结合工程实例,通过对某一场地的地脉动和剪切波速记录,计算得到该场地的卓越周期分别为0.375 s和0.590 s,分析了差别产生的原因;对鲁甸地区某场地强震记录进行计算,得其卓越周期为0.5 s。同时,比较了各种计算方法的适用性,并通过地脉动及强震记录的频谱分析,研究了场地土层结构和场地频谱特性的对应关系。
Site predominant period is an important parameter of site seismic dynamic property. The definitions of site predominant period in different codes are concluded in this paper,as well as its applications,calculation methods,advantages and disadvantages in seismic engineering are described. Combining with engineering examples,through micro-tremor and shear wave velocity records on an engineering site,in which predominant period is calculated of 0. 375 s and 0. 590 s,the causes of difference are analyzed and strong earthquake records on a site in Ludian area,where predominant period is 0. 5 s. At the same time,applications of various calculation methods are compared. The correspond relationship between structure of site soil layer and characteristics of site spectrum is also studied by spectrum analysis of micro-tremor and strong earthquake records.
Site predominant period is an important parameter of site seismic dynamic property. The definitions of site predominant period in different codes are concluded in this paper,as well as its applications,calculation methods,advantages and disadvantages in seismic engineering are described. Combining with engineering examples,through micro-tremor and shear wave velocity records on an engineering site,in which predominant period is calculated of 0. 375 s and 0. 590 s,the causes of difference are analyzed and strong earthquake records on a site in Ludian area,where predominant period is 0. 5 s. At the same time,applications of various calculation methods are compared. The correspond relationship between structure of site soil layer and characteristics of site spectrum is also studied by spectrum analysis of micro-tremor and strong earthquake records.
引文
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[11]黄蕾,方云,严绍军,等.地脉动测试测定场地的卓越周期[J].水利与建筑工程学报,2009,7(1):122-123,137.
[12]高广运,吴世明,周健,等.场地卓越周期的讨论与测定[J].工程勘察,2000(5):29-31.
[13]肖燕武.地震反应谱的局限性及最新发展[J].水利与建筑工程学报,2010,8(6):56-58,83.
[14]林通.场地自振周期计算方法的比较[J].福建建筑,2009(3):70-71.
[15]陈鹏,刘文锋,付兴潘.关于场地卓越周期和特征周期的若干讨论[J].青岛理工大学学报,2009,30(6):30-35.
[2]岩土工程手册编写委员会.岩土工程手册[M].北京:中国建筑工业出版社,1994.
[3]中华人民共和国住房和城乡建设部.工程抗震术语标准:JGJ/T 97-2011[S].北京:中国建筑工业出版社,2011.
[4]陈平,吴博.汶川地震中西安高层建筑震害调查及分析[J].水利与建筑工程学报,2010,8(2):60-62.
[5]金井清.工程地震学[M].常宝琦,张虎男译.北京:地震出版社,1987.
[6]彭远黔,路正,李雪英,等.场地脉动卓越周期在工程抗震中的应用[J].华北地震科学,2000,18(4):61-68.
[7]郑柱坚.场地卓越周期的测定及其在建筑抗震设计中的应用[J].工程抗震,2000(1):36-39.
[8]王钟琦.地震区工程选址手册[M].北京:中国建筑工业出版社,1994.
[9]中华人民共和国住房和城乡建设部.建筑抗震设计规范:GB50011-2010[S].北京:中国建筑工业出版社,2010.
[10]蒋维强,欧阳立胜.场地卓越周期与设计特征周期的关系研究[J].工程抗震,2004(2):46-49.
[11]黄蕾,方云,严绍军,等.地脉动测试测定场地的卓越周期[J].水利与建筑工程学报,2009,7(1):122-123,137.
[12]高广运,吴世明,周健,等.场地卓越周期的讨论与测定[J].工程勘察,2000(5):29-31.
[13]肖燕武.地震反应谱的局限性及最新发展[J].水利与建筑工程学报,2010,8(6):56-58,83.
[14]林通.场地自振周期计算方法的比较[J].福建建筑,2009(3):70-71.
[15]陈鹏,刘文锋,付兴潘.关于场地卓越周期和特征周期的若干讨论[J].青岛理工大学学报,2009,30(6):30-35.