基于随机IDA法的不同抗震设防烈度下RC框架结构的易损性分析

发布时间：2018-06-21 09:55

本文选题：不同设防烈度 + 不确定性　；参考：《中国地震局工程力学研究所》2017年硕士论文

【摘要】：基于性能的抗震设计理论自二十世纪九十年代提出以来,得到了广泛关注,各国学者陆续开展了多方面的研究。传统的抗震思想是以保障人的生命安全为主要设防目标,而基于性能的抗震设计理论是以提高结构的抗震性能为目标,与此同时,能够预估建筑结构在可能发生的地震动作用下的破坏程度。钢筋混凝土(Reinforced Concrete,简称RC)框架结构作为城市多高层建筑的的一种基本体系,在世界范围内得到广泛应用。近些年来的很多次地震中,RC框架结构受损严重。在结构受到严重破坏的同时,处于结构内部的非结构构件亦遭受到不同程度的破坏。因此,开展基于性能的结构抗震研究具有重要的指导意义。本文以一栋典型的五层框架结构为例,利用OpenSEES分别建立三个不同设防烈度下的五层三跨的RC框架结构,采用随机IDA(incremental dynamic analysis)法,深入研究了不同抗震设防烈度下RC框架结构的易损性。本文主要包括以下几个部分的内容:(1)采用PKPM软件,设计一个典型的5层3跨的RC框架结构,然后利用有限元性软件OpenSEES建立7度设防、8度设防、9度设防下相应框架结构的有限元分析模型。(2)采用随机IDA法进行不同设防烈度下RC框架结构的易损性分析,这里的“随机”体现在结构参数的随机性和地震动的随机性,同时考虑结构的随机性和地震动的随机性能够使得易损性的研究更具说服力。(3)研究了不同设防烈度下RC框架结构的易损性,对比分析不同设防烈度下不同性能水准的超越概率。(4)研究了不同设防烈度下RC框架结构在“特大地震”作用下的倒塌概率,对现行规范下结构的安全储备系数进行研究,给出“特大地震”作用下RC框架结构抗震的建议。(5)简要介绍了16届世界地震工程大会上关于非结构构件的热点研究成果,主要包括:非结构填充墙的研究、非结构隔震减震技术的研究以及采用楼面反应谱法计算非结构抗震性能的研究。总结了非结构构件热点研究方向并给出了未来发展趋势的建议。
[Abstract]:Since the theory of performance-based seismic design was put forward in the 1990s, it has been paid more and more attention. The traditional aseismic thought is to protect the human life as the main fortification target, and the performance-based seismic design theory is to improve the seismic performance of the structure as the goal, at the same time, It can estimate the damage degree of the building structure under the action of the possible ground motion. Reinforced concrete (RCC-based) frame structure is widely used in the world as a basic system of multi-high-rise buildings in cities. In recent years, many earthquakes have caused serious damage to RC frame structure. While the structure is seriously damaged, the non-structural members in the structure are also damaged to varying degrees. Therefore, it is of great significance to conduct performance-based seismic research of structures. In this paper, taking a typical five-story frame structure as an example, using OpenSEES, three five-story three-span RC frame structures with different fortification intensities are established, and random incremental dynamic analysis method is used. The vulnerability of RC frame structures with different seismic fortification intensity is studied. This paper mainly includes the following parts: 1) using PKPM software to design a typical 5-story 3-span RC frame structure. Then using the finite element software OpenSEES to establish the finite element analysis model of the corresponding frame structure under the 7 degree fortification and 8 degree fortification and 9 degree fortification. (2) using random IDA method to analyze the vulnerability of RC frame structure with different fortification intensity. The "randomness" here is reflected in the randomness of the structural parameters and the randomness of the ground motion. At the same time, considering the randomness of structure and the randomness of ground motion, the vulnerability of RC frame structure under different fortification intensity is studied. The probability of collapse of RC frame structure under different fortification intensity is studied by comparing and analyzing the transcendence probability of different performance level under different fortification intensity, and the safety reserve coefficient of structure under current code is studied. The suggestion of earthquake resistance of RC frame structure under the action of "great earthquake" is given. The paper briefly introduces the hot research results of non-structural members at the 16th World Seismic Engineering Conference, which mainly include: the research of unstructured infilled walls. The study of non-structural isolation and seismic absorption technique and the calculation of seismic performance of non-structure by floor response spectrum method. This paper summarizes the research direction of non-structural member and gives some suggestions for its future development.
【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】：2017
【分类号】：TU352.11;TU375.4

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