仪器地震烈度与砌体房屋震害相关性初步研究
发布时间：2018-11-05 08:28
【摘要】：仪器地震烈度是基于宏观地震烈度与地震动参数的经验关系得到反映台站附近区域破坏程度的计算烈度,可为地震损失评估、震后应急救援及灾区恢复重建提供重要的科学依据。仪器地震烈度标准的确定应满足两个条件:一是与结构的破坏能有很好的相关性;二是与宏观地震烈度有很好的相关性。现阶段国内外已有仪器地震烈度算法多种多样,但基本是基于第二个条件来确定。本论文基于第一个条件考虑,为了探索一种或几种能很好地反映建筑结构震害的仪器地震烈度计算方法,简单评价国内外常用的仪器地震烈度反映砌体结构震害的能力,推荐一种能合理评估不同使用功能砌体结构震害的仪器地震烈度。本文的主要内容如下:(1)本文归纳总结了6种国内外常用仪器地震烈度计算方法,从地震动特性与结构抗震设计两个方面分别分析了仪器地震烈度所用地震动参数表示的物理意义,为仪器地震烈度和房屋结构震害之间相关性的研究提供理论支撑;并利用发生在中国大陆地区12次破坏性地震中获取的139组台站记录,分别采用这六种仪器地震烈度公式计算得到不同台站的仪器地震烈度值。(2)本文根据德阳市、广元市、江油市和剑阁县的汶川地震震害资料建立了不同使用功能具有代表性的砌体房屋建筑群非线性模型,采用弹塑性动力反应分析方法计算非线性模型群在139组地震动作用下的反应,结合结构损伤指标和破坏等级,确定了不同台站附近的砌体结构房屋的平均震害指数。(3)本文统计了十种地震动参数与砌体结构平均震害指数之间的相关性,得到以下结论:峰值加速度和有效峰值加速度等反映地震对结构力作用的参数与砌体结构的震害有较高的相关性,砌体结构的层数直接影响了地震动参数与砌体结构震害相关性的强弱。(4)本文进一步评价了国内外常用的六种仪器地震烈度反映砌体房屋震害的能力,得到以下结论:六种仪器地震烈度与砌体房屋震害均有较好的相关性,不过考虑结构破坏程度参数的模糊烈度算法能更好的反映砌体结构的震害;虽然砌体结构的破坏机理与层数密切相关,但模糊烈度算法与不同层数的砌体住宅结构震害均有很好的相关性。
[Abstract]:The seismic intensity of the instrument is based on the empirical relationship between the macroscopic seismic intensity and the parameters of the ground motion, and the calculated intensity can reflect the damage degree of the area near the station, which can be used to evaluate the earthquake loss. Emergency rescue after earthquake and reconstruction of disaster areas provide important scientific basis. There are two conditions to be satisfied in determining the seismic intensity standard of instruments: one is good correlation with structural damage and the other is good correlation with macroscopic seismic intensity. At present, there are a variety of instrument seismic intensity algorithms at home and abroad, but basically based on the second condition to determine. In this paper, based on the first condition, in order to explore one or several instrument seismic intensity calculation methods which can well reflect the earthquake damage of building structure, the paper simply evaluates the ability of the instrument seismic intensity to reflect the earthquake damage of masonry structure, which is commonly used at home and abroad. It is recommended that the seismic intensity of an instrument can reasonably evaluate the earthquake damage of masonry structures with different functions. The main contents of this paper are as follows: (1) in this paper, six methods for calculating seismic intensity of domestic and foreign instruments are summarized. In this paper, the physical meaning of the parameter expression of ground motion is analyzed from the aspects of ground motion characteristics and structural seismic design, which provides theoretical support for the study of the correlation between the seismic intensity of instrument and the earthquake damage of building structure. Using 139 sets of station records obtained from 12 destructive earthquakes in the mainland of China, the seismic intensity values of different stations are calculated by using these six kinds of seismic intensity formulas respectively. (2) according to Deyang City and Guangyuan City, The earthquake damage data of Wenchuan in Jiangyou City and Jiange County have established nonlinear models of masonry buildings with different functions. The elastoplastic dynamic response analysis method is used to calculate the response of nonlinear model group under 139 groups of ground motion, combined with the damage index and failure grade of the structure. The average earthquake damage index of masonry structure buildings near different stations is determined. (3) the correlation between the ten kinds of ground motion parameters and the average earthquake damage index of masonry structures is calculated in this paper. The conclusions are as follows: the parameters of peak acceleration and effective peak acceleration which reflect the effect of earthquake on structure force have a high correlation with the earthquake damage of masonry structure. The number of floors of masonry structure has a direct effect on the correlation between seismic parameters and earthquake damage of masonry structure. (4) this paper further evaluates the ability of six kinds of instruments commonly used at home and abroad to reflect the earthquake damage of masonry building. The conclusions are as follows: the seismic intensity of six kinds of instruments has a good correlation with the earthquake damage of masonry buildings, but the fuzzy intensity algorithm considering the structural damage degree parameters can better reflect the earthquake damage of masonry structure; Although the failure mechanism of masonry structure is closely related to the number of stories, the fuzzy intensity algorithm has a good correlation with the earthquake damage of masonry residential structure with different stories.
【学位授予单位】：中国地震局工程力学研究所
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU364;P315.9
本文编号：2311505
[Abstract]:The seismic intensity of the instrument is based on the empirical relationship between the macroscopic seismic intensity and the parameters of the ground motion, and the calculated intensity can reflect the damage degree of the area near the station, which can be used to evaluate the earthquake loss. Emergency rescue after earthquake and reconstruction of disaster areas provide important scientific basis. There are two conditions to be satisfied in determining the seismic intensity standard of instruments: one is good correlation with structural damage and the other is good correlation with macroscopic seismic intensity. At present, there are a variety of instrument seismic intensity algorithms at home and abroad, but basically based on the second condition to determine. In this paper, based on the first condition, in order to explore one or several instrument seismic intensity calculation methods which can well reflect the earthquake damage of building structure, the paper simply evaluates the ability of the instrument seismic intensity to reflect the earthquake damage of masonry structure, which is commonly used at home and abroad. It is recommended that the seismic intensity of an instrument can reasonably evaluate the earthquake damage of masonry structures with different functions. The main contents of this paper are as follows: (1) in this paper, six methods for calculating seismic intensity of domestic and foreign instruments are summarized. In this paper, the physical meaning of the parameter expression of ground motion is analyzed from the aspects of ground motion characteristics and structural seismic design, which provides theoretical support for the study of the correlation between the seismic intensity of instrument and the earthquake damage of building structure. Using 139 sets of station records obtained from 12 destructive earthquakes in the mainland of China, the seismic intensity values of different stations are calculated by using these six kinds of seismic intensity formulas respectively. (2) according to Deyang City and Guangyuan City, The earthquake damage data of Wenchuan in Jiangyou City and Jiange County have established nonlinear models of masonry buildings with different functions. The elastoplastic dynamic response analysis method is used to calculate the response of nonlinear model group under 139 groups of ground motion, combined with the damage index and failure grade of the structure. The average earthquake damage index of masonry structure buildings near different stations is determined. (3) the correlation between the ten kinds of ground motion parameters and the average earthquake damage index of masonry structures is calculated in this paper. The conclusions are as follows: the parameters of peak acceleration and effective peak acceleration which reflect the effect of earthquake on structure force have a high correlation with the earthquake damage of masonry structure. The number of floors of masonry structure has a direct effect on the correlation between seismic parameters and earthquake damage of masonry structure. (4) this paper further evaluates the ability of six kinds of instruments commonly used at home and abroad to reflect the earthquake damage of masonry building. The conclusions are as follows: the seismic intensity of six kinds of instruments has a good correlation with the earthquake damage of masonry buildings, but the fuzzy intensity algorithm considering the structural damage degree parameters can better reflect the earthquake damage of masonry structure; Although the failure mechanism of masonry structure is closely related to the number of stories, the fuzzy intensity algorithm has a good correlation with the earthquake damage of masonry residential structure with different stories.
【学位授予单位】：中国地震局工程力学研究所
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU364;P315.9
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