摘要
合理的强震记录选取对于结构时程分析具有重要意义,而其地震动特性是否符合要求是判断选取结果是否合理的先决条件。我国建筑抗震设计规范中设计地震分组与设防烈度的概念并无清晰对应的地震动参数指标,故工程及研究人员在实际选波过程中往往模糊了上述要求。利用地震烈度和峰值加速度的衰减关系,首先给出了各设防烈度下震级的初选范围,进而针对远场的高烈度设防地区给出了距离初选范围,最后结合目前常用的国内外强震记录数据现状给出了场地类别筛选的建议。结论可为工程建筑依据抗震规范进行强震记录选取提供参考。
A rational ground motion selection method plays an important role in structure time history analysis,which depends on whether record′s earthquake character is proper.It is often neglected when selecting real strong ground motion for engineering or study,for the design seismic group and design intensity in Chinese seismic code are too ambiguous to find corresponding records.This paper uses intensity and peak ground motion acceleration（PGA）attenuation relationship to find the proper magnitude window for different design intensity.For structure in farfield and high intensity area,this paper gives a distance range for it.Considering the situation of Chinese and abroad record database,we give the referenced site parameters for different site class.The proposed selection criteria can provide reference for selecting time histories.This method not only narrow the range from large database,but also avoid choosing significantly unreasonable ones.
出处
《防灾减灾工程学报》
CSCD
北大核心
2016年第1期44-49,共6页
Journal of Disaster Prevention and Mitigation Engineering
基金
地震行业科研专项(201508005)
黑龙江省科学基金项(LC2015022)
国家科技与支撑计划课题(2014BAK03B01)
关键词
强震记录选取
初选条件
设计地震分组
strong motion records selection
initial selection criteria
design seismic group
