預(yù)壓裝配結(jié)構(gòu)節(jié)點(diǎn)阻尼器耗能性能研究
[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.
【學(xué)位授予單位】:華北理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU352.1
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