阻尼填充墙在框架核心筒结构中的应用及抗震性能分析

发布时间：2018-04-09 19:56

本文选题：阻尼填充墙　切入点：高烈度区　出处：《合肥工业大学》2017年硕士论文

【摘要】：框架核心筒结构由于具有很好的抗震性能,是国内外高层建筑和超高层建筑广泛采用的结构形式之一。在高烈度地区采用框架核心筒结构体系,为了满足结构抗震设计的要求,结构的受力构件需要较大的截面尺寸和配筋,不仅成本增加,还增加施工的难度,同时结构自重的增加又不利于抗震。阻尼填充墙作为一种新型的耗能减震体系,利用其阻尼层的剪切滞回变形,耗散输入结构的地震能量,为提高结构的抗震性能提供新的方法。本文在分析以往学者关于阻尼填充墙研究成果的基础上,从多个角度对阻尼填充墙在框架核心筒结构中的应用进行研究,提出了一些建议和结论。主要研究内容如下:(1)对阻尼填充墙进行了理论研究,介绍了阻尼填充墙的工作机理和阻尼填充墙的简化力学模型,并给出模拟单元在有限元软件中参数的取值;(2)以某25层框架核心筒结构的实际工程为研究对象,利用有限元软件建立原结构和阻尼填充墙加固后整体结构的三维空间模型。通过对结构进行静力分析可知,阻尼填充墙可为结构提供一定的抗侧刚度和附加阻尼,使楼层层间位移和层间位移角都减小,结构的动力反应降低,结构的抗震性能得到改善。同时,框架核心筒主体结构承担的楼层剪力减小,有效保护了主体结构免受地震作用破坏;(3)通过对结构进行时程分析可知,设置阻尼填充墙后,可有效降低结构的位移响应,减小层间位移角并使之满足规范要求,阻尼填充墙耗散输入地震的大部分能量,起到了充当耗能减震第一道防线的作用,同时由于阻尼填充墙的特殊构造形式,地震时墙体平面内不会提前破坏;(4)建立另外两种不同阻尼填充墙布置形式的结构体系,通过对结构进行反应谱分析和时程分析可知,阻尼填充墙的位置和数量都会影响整体结构的抗震性能,合理的布置阻尼填充墙,不仅能够提高经济性,还能增加结构的安全性。
[Abstract]:Because of its good seismic performance, frame core tube structure is one of the widely used structural forms in high-rise buildings and super high-rise buildings at home and abroad.In order to meet the requirements of seismic design of frame core tube structure system in high intensity area, the structural members need larger section size and reinforcement, which not only increase the cost, but also increase the difficulty of construction.At the same time, the increase of structural weight is not conducive to earthquake resistance.As a new type of energy dissipation and seismic absorption system, the damping infill wall provides a new method for improving the seismic performance of the structure by using the shear hysteretic deformation of the damping layer and dissipating the seismic energy of the input structure.On the basis of analyzing the previous research achievements of damped infilled wall, this paper studies the application of damped infilled wall in frame core tube structure from several angles, and puts forward some suggestions and conclusions.The main research contents are as follows: (1) A theoretical study on the damping infill wall is carried out, and the working mechanism of the damped infill wall and the simplified mechanical model of the damped infill wall are introduced.Taking the actual engineering of a 25-story frame-tube structure as the research object, the three-dimensional spatial model of the original structure and the whole structure strengthened by damped infilled wall is established by using the finite element software.Through the static analysis of the structure, it can be known that the damping infill wall can provide certain lateral stiffness and additional damping for the structure, reduce the interstory displacement and the interstory displacement angle, reduce the dynamic response of the structure, and improve the seismic performance of the structure.At the same time, the floor shear force of the main structure of the frame core tube is reduced, which effectively protects the main structure from earthquake damage. Through the time-history analysis of the structure, it is known that the displacement response of the structure can be effectively reduced by setting the damped infilled wall.Reducing the interstory displacement angle to meet the requirements of the specifications, the damping fill wall dissipates most of the input energy of the earthquake, which acts as the first line of defense for the energy dissipation and shock absorption. At the same time, because of the special structural form of the damping filled wall,During the earthquake, the wall plane will not be destroyed in advance) the other two kinds of structural systems with different damping infill wall arrangement are established. The response spectrum analysis and time history analysis of the structure can be concluded by means of the analysis of the response spectrum and the time history of the structure.The location and quantity of damped infill wall will affect the seismic performance of the whole structure. The reasonable arrangement of damped infilled wall can not only improve the economy but also increase the safety of the structure.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973

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