预压装配结构节点阻尼器耗能性能研究

发布时间：2018-09-03 19:49

【摘要】：近年来,预压装配式结构在人们生活中所起到的作用越来越重要。但是传统预应力装配式钢筋混凝土框架结构的大量应用却受到限制,原因就是:梁柱结构节点处的连接不够稳固,抗震形式不满足规范。梁柱连接处损坏后会导致结构整体难以支撑。人们根据多次经历地震的经验,采用消能减震技术来避免地震给人们带来的灾难。减震消能技术的概念就是在梁柱连接处设置阻尼装置,通过附加的阻尼装置来增加结构的整体刚度从而耗散更多的地震能量,来达到减小地震危害的目的。本课题设计并制作了4个节点试件,即现浇边节点试件、现浇中节点试件、附加阻尼装置的边节点试件、附加阻尼装置的中节点试件。用拟静力试验方法对4个节点试件进行试验研究。在试验完成后,根据相关试验条件利用ABAQUS有限元软件对两类边节点和中节点试件进行建模分析,基本步骤包括:中节点与边节点试件钢筋、混凝土参数的设置,部件的装配,位移与力两个分析步的设置,预应力钢筋的添加,边界条件的添加,网格的划分,结果的提交等,从而归纳得出预压装配框架结构节点阻尼器的相关耗能性能。通过分析试验与有限元的滞回曲线与刚度曲线等耗能性能指标可以表明:附加阻尼装置的预压框架结构节点与现浇结构节点相比,附加阻尼装置的结构节点耗消耗能量的程度得到了较大提高,承载能力也得到一定程度的增强,有效地提高了结构的整体刚度,为研究预压装配结构节点阻尼器的耗能性能提供了试验根据与理论基础。
[Abstract]:In recent years, preloading prefabricated structure plays a more and more important role in people's life. However, a large number of applications of traditional prestressed reinforced concrete frame structures are limited, because the connection at the joints of Liang Zhu structure is not firm enough, and the seismic form does not meet the specifications. Liang Zhu joint damage will lead to the structure as a whole difficult to support. According to the experience of many earthquake experiences, energy dissipation technology is adopted to avoid the disaster caused by earthquake. The concept of energy absorption and dissipation technology is to set up damping devices at the joint of Liang Zhu, which can increase the overall stiffness of the structure and dissipate more seismic energy, so as to reduce the earthquake damage. In this paper, four node specimens are designed and made, that is, cast-in-place node specimen, side node specimen with damping device, and middle node specimen with additional damping device. Four nodal specimens were tested by pseudostatic test method. After the completion of the test, according to the relevant test conditions, the ABAQUS finite element software is used to model and analyze the two kinds of edge joints and mid-node specimens. The basic steps include: the steel bar of the middle node and the side joint, the setting of concrete parameters, the assembly of the components. The two analytical steps of displacement and force, the addition of prestressed steel bar, the addition of boundary condition, the division of mesh, the submission of results, etc. By analyzing the hysteretic curve and stiffness curve of finite element, it can be shown that the joints of preloaded frame structure with additional damping device are compared with those of cast-in-place structure. The energy consumption of structural joints with additional damping devices has been greatly improved, and the bearing capacity has been enhanced to a certain extent, which effectively improves the overall stiffness of the structure. It provides the experimental basis and theoretical basis for studying the energy dissipation performance of the joint damper of preloaded assembly structure.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.1

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