新型装配式轻质人字支撑抗震墙抗震性能分析

发布时间：2018-03-21 11:34

本文选题：轻质人字支撑抗震墙　切入点：抗震性能　出处：《郑州大学》2016年硕士论文　论文类型：学位论文

【摘要】：钢筋混凝土抗震墙结构具有较高的承载能力及抗侧移刚度,被广泛用于高层和超高层建筑,为了减少施工现场的环境及噪声污染,近年来装配式剪力墙结构成为国内外学者的研究重点。但是传统装配式剪力墙由于自重较大,给施工时吊装及安装带来极大不便。因此,本课题组提出一种新型轻质人字支撑抗震墙,即将实体RC剪力墙的墙体受力最小的部分用较小的截面斜撑代替,可以在一定程度上减轻构件自重,减小地震作用。本文采用有限元程序OpenSees对其进行数值模拟,研究其抗震性能,主要内容为:首先,针对已有文献中某实体钢筋混凝土剪力墙试验试件W-1,采用OpenSees软件进行水平低周反复荷载的数值模拟分析,和试验结果比较表明,滞回曲线、骨架曲线及相关特征值均与试验结果吻合良好,说明本文选取的有限元软件OpenSees模型及其相关参数的准确性。在此基础上,进一步选取某工程实例中的一片实体RC剪力墙进行竖向荷载及水平低周反复荷载的数值模拟分析。分析工程实例中实体RC剪力墙的钢筋应力曲线,提出新型装配式轻质人字支撑抗震墙洞口的基本尺寸,然后进一步研究不同洞口尺寸和RC支撑对其抗震性能的影响,在满足与实体剪力墙相同的抗震性能基础上,给出了洞口尺寸的取值范围和合理的RC支撑。最后,研究考虑空间作用下高层装配式轻质人字支撑抗震墙的抗震性能,针对某实际高层框架剪力墙结构的一个单元,利用有限元分析程序OpenSees建立整体结构模型,将其中的实体剪力墙替换为本课题组所提出的新型轻质人字支撑抗震墙,采用时程分析法,分别研究整体结构为8和12层时,在不同地震设防水准下结构的动力响应,结果表明:采用本文提出的轻质支撑抗震墙的结构满足同样结构采用实体剪力墙的性能目标3,且轻质支撑抗震墙在地震作用下,支撑首先屈服、然后才是抗震墙体屈服,因此,形成了多道抗震防线的结构体系。
[Abstract]:Reinforced concrete anti-seismic wall structure has high bearing capacity and anti-lateral stiffness, so it is widely used in high-rise and super-high-rise buildings, in order to reduce the environment and noise pollution of the construction site. In recent years, assembly shear wall structure has become the research focus of scholars at home and abroad. However, the traditional assembly shear wall has brought great inconvenience to hoisting and installation during construction because of its heavy weight. Our group proposed a new type of lightweight herringbone braced seismic wall, that is, the part of the wall with the smallest force of solid RC shear wall can be replaced by small cross-section oblique braces, which can reduce the weight of the member to a certain extent. In order to reduce seismic action, the finite element program OpenSees is used to simulate the seismic behavior. The main contents are as follows: first of all, According to W-1 test specimen of a solid reinforced concrete shear wall, numerical simulation analysis of horizontal low cycle repeated load is carried out by using OpenSees software. Compared with the experimental results, the hysteretic curve is obtained. The skeleton curve and the related eigenvalues are in good agreement with the experimental results, which shows the accuracy of the finite element software OpenSees model and its related parameters. A solid RC shear wall in an engineering example is further selected for numerical simulation analysis of vertical load and horizontal low cycle repeated load, and the stress curve of steel bar of solid RC shear wall is analyzed. This paper presents the basic dimensions of the new fabricated lightweight herringbone bracing wall openings, and further studies the effects of different orifice sizes and RC braces on its seismic performance, on the basis of satisfying the same seismic performance as the solid shear walls. Finally, the aseismic performance of high-rise fabricated lightweight herringbone bracing wall under space is studied, and a unit of a practical high-rise frame shear wall structure is presented. The integral structure model is established by using finite element analysis program OpenSees, and the solid shear wall is replaced by the new lightweight herringbone braced seismic wall proposed by our team. The time history analysis method is used to study the whole structure with 8 and 12 stories, respectively. The dynamic response of the structure under different seismic fortification levels is obtained. The results show that the structure with lightweight braced seismic wall proposed in this paper meets the performance goal of the same structure with solid shear wall 3, and the lightweight braced seismic wall is subjected to seismic action. The braces yield first and then the seismic walls, so the structure system with multiple seismic lines is formed.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU352.11

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