附加阻尼器的隔震效果研究

发布时间：2018-05-16 09:54

本文选题：超塑性 + 金属阻尼器　；参考：《山东建筑大学》2017年硕士论文

【摘要】：隔震和消能减震是两种控制结构地震反应的有效措施。基础隔震是在基础和上部结构之间设置隔震层,通过隔震层的大变形消耗地震能量,从而减小上部结构的地震反应;消能减震技术是在结构中附加一些阻尼器等消能装置,地震时,消能装置消耗地震能量,而主体结构的地震反应得到控制。铅芯橡胶支座是经常采用的隔震元件,铅芯的主要作用是通过自身的塑性变形消耗地震能量,一定程度上说铅芯和阻尼器发挥的作用是类似的。然而,铅芯的制造和使用都存在污染环境的问题。本文研究的正是普通叠层橡胶支座与由超塑性合金材料(Zn-22%Al)制成的阻尼器组成的新的隔震支座。研究的主要内容包括:首先,运用ABAQUS对U型Zn-22%Al金属阻尼器的进行分析,得到了与位移相关的等效刚度和等效阻尼。然后将阻尼器放入隔震建筑中的隔震层,研究了隔震层中附加阻尼的建筑物的隔震效果。通过Sap2000建立四种结构模型,一是非隔震结构,二是全部采用普通叠层橡胶支座(LNR)的隔震结构,三是全部采用铅芯橡胶支座(LRB)的隔震结构,四是LNR附加U型阻尼器的隔震结构。运用时程分析方法,计算了各个模型在地震动输入下的地震反应。研究结果表明:1.U型Zn-22%Al金属阻尼器滞回曲线饱满,具有良好的消能能力,是一种较好的消能装置;2.通过与非隔震结构相比,三种隔震方式均可以明显降低结构的地震反应,LNR附加U型阻尼器的隔震结构比全部采用LNR的隔震结构效果更好;3.U型Zn-22%Al金属阻尼器有明显的消能作用,在一定程度上能起到铅芯的作用。
[Abstract]:Seismic isolation and energy dissipation are two effective measures for seismic response of control structures. Base isolation is a seismic isolation layer between the base and the superstructure, which consumes seismic energy through the large deformation of the isolation layer, thus reducing the seismic response of the upper structure, and the energy dissipation technology is an additional damper and other energy dissipation devices in the structure, when the earthquake, The energy dissipation device consumes the seismic energy, and the seismic response of the main structure is controlled. The lead rubber bearing is a frequent isolator. The main function of the lead core is to consume the seismic energy through its own plastic deformation. To some extent, the role of lead and damper is similar. However, the manufacture and use of lead core are all present. The problem of polluted environment is the new isolation bearing of the common laminated rubber bearing and the dampers made of superplastic alloy material (Zn-22%Al). The main contents of this study include: first, the analysis of the U type Zn-22%Al metal dampers is carried out with the use of ABAQUS, and the equivalent stiffness and the equivalent damping of the displacement related to the displacement are obtained. Then the damper is put into the isolation layer in the isolated building, and the isolation effect of the additional damping building in the isolation layer is studied. Four structural models are established through Sap2000, one is the non isolation structure, the two is the isolation structure of the common laminated rubber bearing (LNR), and the three is the isolation structure of the lead rubber bearing (LRB), and four is the structure of the isolation structure. LNR attached U type damper structure. Using the time history analysis method, the seismic response of each model under ground motion is calculated. The results show that the hysteresis curve of the 1.U Zn-22%Al metal damper is full and has good energy dissipation capacity. It is a better energy dissipation device; 2. by comparing with the non isolation structure, three kinds of isolation methods are compared. The seismic response of the structure can be reduced obviously. The isolation structure of LNR with U type damper is better than all the isolated structure using LNR, and the 3.U Zn-22%Al metal damper has obvious energy dissipation effect, and it can play the role of lead core to some extent.

【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.1

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