基于IDA的不同框架—剪力墙结构的抗震性能分析
发布时间：2018-11-22 17:00
【摘要】：就我国而言，为了解决人口众多，用地紧张问题，多高层建筑在我国房屋建筑中迅速增多，而框架-剪力墙结构体系又是目前高层结构中最常用的结构形式之一，且在城市建筑结构中占有较大的比重。因此开展该类结构抗震性能分析对震害防御及地震灾害应急具有重要的应用价值。 首先，本文总结了关于结构地震易损性研究的国内外现状，并针对当前框架-剪力墙结构缺少实际震害资料，而且对框架-剪力墙结构的地震易损性研究较少的状况，提出了基于增量动力分析对框架-剪力墙结构进行地震易损性研究的方法。 其次，本文以一栋12层的框架-剪力墙结构为例，并以SAP2000为分析软件，建立了不同剪力墙厚度和底层层高下的结构有限元分析模型。并对各模型进行了罕遇地震作用下的弹塑性分析。并根据分析结果，研究了结构的固有周期、顶层加速度、结构各层水平位移、结构各层层间位移角随剪力墙厚度和底层层高改变而变化的规律。 然后，从各模型中分别选取一榀典型的框架-剪力墙结构进行IDA分析，并根据IDA分析结果对框架-剪力墙结构展开了地震易损性分析研究，评价了结构的抗震性能，分析了剪力墙厚度和底层层高的变化对结构抗倒塌能力的影响。分析结果表明，，严格按照我国现行设计规范设计的框架-剪力墙结构都能满足“大震不倒”的设防目标。随着剪力墙厚度的增加，结构抗震性能增强，结构更难达到各破坏状态，当剪力墙厚度达到一定程度后，其对结构达到各破坏状态概率的影响度会越来越小。随着底层层高的增加，结构抗震性能虽然有所降低，结构更容易达到各破坏状态，但还是可以发现，当底层层高在标准层层高的1~2倍之间变化时，结构的抗倒塌储备系数降低的幅度不大，即结构的抗倒塌能力不会显著降低。 最后，对本文的研究工作作了总结，并提出了今后工作的方向。
[Abstract]:As far as our country is concerned, in order to solve the problem of large population and shortage of land, many high-rise buildings are increasing rapidly in our country, and the frame-shear wall structure system is one of the most commonly used structural forms in high-rise structures at present. And occupies a large proportion in the urban building structure. Therefore, the seismic performance analysis of this kind of structures has important application value in earthquake disaster prevention and earthquake disaster emergency. First of all, this paper summarizes the current situation of seismic vulnerability of structures at home and abroad, and aims at the lack of actual seismic damage data of frame-shear wall structures, and the situation that the seismic vulnerability of frame-shear wall structures is less studied. Based on incremental dynamic analysis, the seismic vulnerability of frame-shear wall structures is studied. Secondly, taking a 12-story frame-shear wall structure as an example, and taking SAP2000 as the analysis software, the finite element analysis model of the structure with different shear wall thickness and the height of the bottom layer is established. The elastic-plastic analysis of each model under the action of rare earthquake is carried out. Based on the analysis results, the inherent period of the structure, the acceleration of the top floor, the horizontal displacement of each story of the structure, and the displacement angle between the layers of the structure are studied, which vary with the thickness of the shear wall and the height of the bottom layer. Then, a typical frame-shear wall structure is selected from each model for IDA analysis. According to the results of IDA analysis, the seismic vulnerability analysis of frame-shear wall structure is carried out, and the seismic performance of the structure is evaluated. The influence of the thickness of shear wall and the height of the bottom layer on the collapse resistance of the structure is analyzed. The analysis results show that the frame-shear wall structure designed strictly according to the current design code of our country can meet the goal of "strong earthquake will not collapse". With the increase of shear wall thickness, the seismic performance of the structure is enhanced, and it is more difficult for the structure to reach the failure state. When the shear wall thickness reaches a certain degree, the influence of the shear wall thickness on the probability of the structure to each failure state will become smaller and smaller. With the increase of the height of the bottom layer, the seismic performance of the structure decreases somewhat, and the structure is more likely to reach the failure state. However, it can be found that when the height of the bottom layer changes between 1 and 2 times the standard layer height, The collapse resistance reserve coefficient of the structure is not much reduced, that is, the collapse resistance of the structure will not be significantly reduced. Finally, the research work of this paper is summarized, and the direction of future work is put forward.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398.2
[Abstract]:As far as our country is concerned, in order to solve the problem of large population and shortage of land, many high-rise buildings are increasing rapidly in our country, and the frame-shear wall structure system is one of the most commonly used structural forms in high-rise structures at present. And occupies a large proportion in the urban building structure. Therefore, the seismic performance analysis of this kind of structures has important application value in earthquake disaster prevention and earthquake disaster emergency. First of all, this paper summarizes the current situation of seismic vulnerability of structures at home and abroad, and aims at the lack of actual seismic damage data of frame-shear wall structures, and the situation that the seismic vulnerability of frame-shear wall structures is less studied. Based on incremental dynamic analysis, the seismic vulnerability of frame-shear wall structures is studied. Secondly, taking a 12-story frame-shear wall structure as an example, and taking SAP2000 as the analysis software, the finite element analysis model of the structure with different shear wall thickness and the height of the bottom layer is established. The elastic-plastic analysis of each model under the action of rare earthquake is carried out. Based on the analysis results, the inherent period of the structure, the acceleration of the top floor, the horizontal displacement of each story of the structure, and the displacement angle between the layers of the structure are studied, which vary with the thickness of the shear wall and the height of the bottom layer. Then, a typical frame-shear wall structure is selected from each model for IDA analysis. According to the results of IDA analysis, the seismic vulnerability analysis of frame-shear wall structure is carried out, and the seismic performance of the structure is evaluated. The influence of the thickness of shear wall and the height of the bottom layer on the collapse resistance of the structure is analyzed. The analysis results show that the frame-shear wall structure designed strictly according to the current design code of our country can meet the goal of "strong earthquake will not collapse". With the increase of shear wall thickness, the seismic performance of the structure is enhanced, and it is more difficult for the structure to reach the failure state. When the shear wall thickness reaches a certain degree, the influence of the shear wall thickness on the probability of the structure to each failure state will become smaller and smaller. With the increase of the height of the bottom layer, the seismic performance of the structure decreases somewhat, and the structure is more likely to reach the failure state. However, it can be found that when the height of the bottom layer changes between 1 and 2 times the standard layer height, The collapse resistance reserve coefficient of the structure is not much reduced, that is, the collapse resistance of the structure will not be significantly reduced. Finally, the research work of this paper is summarized, and the direction of future work is put forward.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398.2
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