【作者】 甘朋霞；

【导师】 李小军；

【作者基本信息】 中国地震局工程力学研究所 ， 防灾减灾工程及防护工程， 2009， 硕士

【摘要】 中国地震烈度表是用一些震害现象及未经抗震设计或加固的单层或数层砖混和砖木房屋的震害程度和平均震害指数来进行烈度评定。然而评定指标涉及的关键的房屋建筑的类型在现存建筑中逐年减少,经过抗震设防的房屋建筑逐年增多。为适应建筑工程的现状和发展趋势、合理地评定地震烈度,需要建立考虑以抗震设防房屋的震害现象和程度为指标的地震烈度评定指标体系。本文就这一问题进行了研究,主要研究工作内容和成果包括:1.分析并建立了结构的破坏等级与延性比及震害指数的关系。2.提出了基于抗震设防水准及R-μ-T关系的结构抗震能力分析方法。3.对结构抗震能力进行分析,得到了各类场地、各抗震设防等级的砌体及框架结构易损性曲线——房屋破坏比随地震动峰值加速度变化的关系曲线。并根据易损性曲线分析了我国抗震设防三水准的合理性。4.根据得到的结构易损性曲线及建立的破坏等级与震害指数的关系,得到了各类结构平均震害指数与地震动峰值加速度的关系。5.根据得到的结构平均震害指数与地震动峰值加速度的关系,与实际地震烈度(包括汶川地震烈度)评定结果比较分析,论证了中国地震烈度表中地震烈度与地震动峰值加速度的对应关系的合理性。更多还原

【Abstract】 In the Chinese seismic intensity scale,the evaluation of intensity is based on the earthquake disaster phenomena and the average damage index of the undefended one-story or multi-layered masonry and timber buildings.But as the key buildings to evaluate the seismic intensity,the existing undefended buildings are decreasing,and the earthquake resistant buildings are increasing year by year.Therefore,the new index system for reasonable eveluation of the seismic intensity is needed based on the undefended buildings and earthquake resistant buildings.On the basis of the above consideration,this study has discussed some relative problems.The main work is as follows.1.Analyzed and established the relationship between the hierarchy of destruction and the ductility ratio or the damage index.2.Proposed a method to analyze the structural seismic capacity based on the seismic standards and the relationship between ductility ratio and seismic force reduction factor.3.Based the analysis of the seismic capacity for different earthquake assistant building structures,the vulnerability curves,that is,the relations between building damage degree and peak ground acceleration,are obtained for the masonry and frame structures in the case of different site conditions and earthquake fortification zones.According to the vulnerability curves,the the consistency of the three seismic fortification levels is discussed.4.According to the vulnerability curves of the structures and the relationship between the destruction hierarchy and the damage index,the relationships between average damage index and peak ground acceleration are presented for some types of building structures.5.According to the relationship between structural average damage index and peak ground acceleration and the intensity assessment results of some earthquakes including Wenchuan earthquake,the corresponding relationship between peak ground acceleration and seismic intensity in the Chinese seismic intensity scale is verified to be reasonable.更多还原