在役结构抗震评估地震作用取值研究
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摘要
本文阐述了研究在役结构评估用地震作用取值的必要性,并提出了评估基准期和评估烈度的概念;根据现有的烈度分布函数,建立了考虑不同评估基准期和不同地区地震危险性差异的地震烈度概率模型;按照等超越概率原则,提出了确定在役结构抗震评估用地震烈度的取值标准和方法,并给出了强度验算和变形验算地震作用参数的具体取值;对服役期间已遭遇过地震的结构,提出了烈度调整建议,为在役结构的抗震安全性评估提供了合理可行的荷载标准.
As is suggested in the paper it is necessary to study the earthquake action for assessment of existing structures and the concept of assessment datum term and of assessment intensity is introduced. According to the existing distribution of intensity, the probability model of earthquake intensity which takes different assessment datum term and different area earthquake risk into account is established. Based on the equal exceeding probability principle, the standard and method are proposed to determine the earthquake intensity for seismic assessment of existing structures, and parameters of earthquake action for strength checking and deformation checking are also given in the paper. In addition, the adjustment suggestion is put forward for those structures which have suffered from earthquakes in previous service term. In this way, a proper earthquake action standard is offered for seismic security assessment of existing structures.
As is suggested in the paper it is necessary to study the earthquake action for assessment of existing structures and the concept of assessment datum term and of assessment intensity is introduced. According to the existing distribution of intensity, the probability model of earthquake intensity which takes different assessment datum term and different area earthquake risk into account is established. Based on the equal exceeding probability principle, the standard and method are proposed to determine the earthquake intensity for seismic assessment of existing structures, and parameters of earthquake action for strength checking and deformation checking are also given in the paper. In addition, the adjustment suggestion is put forward for those structures which have suffered from earthquakes in previous service term. In this way, a proper earthquake action standard is offered for seismic security assessment of existing structures.
引文
[1] 魏琏,王广军.地震作用[M].北京:地震出版社,1991.
[2] 高小旺,鲍霭斌.抗震设防标准及各类建筑物抗震设计中"小震"与"大震"的取值[J].地震工程与工程振动,1989,9(1):58-66.
[3] 高小旺,鲍霭斌.地震作用的概率模型及其统计参数[J].地震工程与工程振动,1985,5(1):13-22.
[4] 马玉宏,谢礼立.考虑地震环境的设计常遇地震和罕遇地震的确定[J].建筑结构学报,2002,23(1):43-47.
[5] 李亚琦.中国地震危险性特征区划[D].哈尔滨:中国地震局工程力学研究所,1999.
[6] 中华人民共和国国家标准.建筑抗震设计规范(GB50011-2001)[S].
[2] 高小旺,鲍霭斌.抗震设防标准及各类建筑物抗震设计中"小震"与"大震"的取值[J].地震工程与工程振动,1989,9(1):58-66.
[3] 高小旺,鲍霭斌.地震作用的概率模型及其统计参数[J].地震工程与工程振动,1985,5(1):13-22.
[4] 马玉宏,谢礼立.考虑地震环境的设计常遇地震和罕遇地震的确定[J].建筑结构学报,2002,23(1):43-47.
[5] 李亚琦.中国地震危险性特征区划[D].哈尔滨:中国地震局工程力学研究所,1999.
[6] 中华人民共和国国家标准.建筑抗震设计规范(GB50011-2001)[S].
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