高层框架—剪力墙结构在罕遇地震作用下的静力弹塑性分析

发布时间：2018-04-06 05:33

本文选题：框架-剪力墙结构　切入点：静力弹塑性　出处：《青岛理工大学》2013年硕士论文

【摘要】：近年来，随着我国经济的迅猛发展，人们大量涌入城市，土地资源日益紧缺，高层建筑不断涌现。上世纪末至今，人们对高层建筑的使用功能越来越广泛，建筑的结构形式也越来越复杂，多塔楼连体结构应运而生。但是，建筑结构形式越复杂，受地震作用破坏越严重。进入21世纪以后，我国发生了例如：汶川大地震、玉树地震、雅安地震等等破坏性极强的地震。所以如何使复杂结构在罕遇地震下保证其性能的安全性变的迫在眉睫。本文结合临沂市某大底盘双塔楼连体结构中的A塔楼对其抗震性能进行了分析研究。本文应用MIDAS（building）大型有限元软件，建立了高层框架-剪力墙结构的三维有限元计算模型，进行了小震静力、动力特性分析以及罕遇地震下的静力弹塑性分析。首先，对结构进行振型反应谱分析，取X向和Y向地震两种工况分析，并考虑结构偶然偏心的影响。研究了结构在单向地震作用下的内力、变形以及扭转性能；并将反应谱分析的计算结果与规范限制进行比较。其次，选择合适的地震波对结构进行弹性时程分析，从X向和Y向分别输入地震波对结构进行分析；研究了结构在多遇地震作用下楼层剪力和层间位移角是否满足结构要求；并将弹性时程与反应谱计算结果下的基底剪力与层间位移角进行了比较，探讨了结构在多遇地震作用下“小震不坏”的抗震要求。最后，对结构进行了静力弹塑性分析。采用振型加载方式和层剪力分布加载方式，，分别对结构在X向和Y向的静力弹塑性进行分析；研究了结构在罕遇地震下的楼层剪力、结构的变形以及塑性铰的发展和分布规律；通过计算性能点，得出X和Y方向的最大位移角和结构顶层的最大位移，对比滑移支座安全位移限量得出该结构在罕遇地震作用下连接体不会滑落；找出了结构在罕遇地震下塑性铰分布的区域，判断了结构是否存在薄弱层，分析了结构的破坏机制，探讨了结构“中震可修，大震不倒”的抗震要求。
[Abstract]:In recent years, with the rapid development of China's economy, people pour into cities, land resources are increasingly scarce, high-rise buildings continue to emerge.Since the end of the last century, the use of high-rise buildings has become more and more extensive, and the structural forms of the buildings have become more and more complex, and the multi-tower conjoined structure has emerged as the times require.However, the more complex the structural form, the more serious damage caused by earthquake.After entering the 21st century, China has such devastating earthquakes as Wenchuan earthquake, Yushu earthquake, Ya'an earthquake and so on.Therefore, it is urgent to ensure the safety of complex structures under rare earthquakes.In this paper, the seismic behavior of A tower in the conjoined structure of a large chassis and double tower in Linyi City is analyzed and studied.In this paper, a three-dimensional finite element model of high-rise frame-shear wall structures is established by using Midas building software. The static and dynamic characteristics of small earthquakes and the static elastic-plastic analysis under rare earthquakes are analyzed.First of all, the vibration response spectrum of the structure is analyzed. The X-direction and Y-direction seismic conditions are analyzed, and the influence of occasional eccentricity of the structure is considered.The internal force, deformation and torsional behavior of the structure under unidirectional earthquake are studied, and the calculated results of response spectrum analysis are compared with the criterion limitation.Secondly, select the appropriate seismic wave to carry on the elastic time history analysis to the structure, input the seismic wave from the X direction and Y direction respectively to analyze the structure, and study whether the floor shear force and the displacement angle of the floor meet the structural requirement under the action of frequent earthquake.The base shear force and the displacement angle of the floor are compared with the results of elastic time history and response spectrum calculation, and the seismic requirements of "small earthquake is not bad" are discussed in this paper.Finally, the static elastoplastic analysis of the structure is carried out.The static elastoplasticity of the structure in X and Y directions is analyzed by means of mode loading mode and story shear load mode, and the development and distribution of floor shear force, deformation of structure and plastic hinge under rare earthquake are studied.The maximum displacement angle of X and Y directions and the maximum displacement of the top layer of the structure are obtained by calculating the performance points, and the limit of the safety displacement of the sliding bearing is compared.The region of plastic hinge distribution under rare earthquake is found out, the weak layer is judged, the failure mechanism of the structure is analyzed, and the seismic requirement of "medium earthquake is repairable but large earthquake is not collapsed" is discussed.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.16

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