新型黏滞阻尼器力学性能试验研究及实用仿真

发布时间：2019-06-29 07:10

【摘要】：耗能减震技术是指在结构合适的位置安置消能减震装置,通过这些预先设置好的耗能装置来消耗结构在风振和地震作用下的响应,使得地震的能量得以耗散,从而结构受到保护。黏滞液体阻尼器就是一种新型的耗能减震装置。国外对黏滞阻尼器的研究较早,并且在工程应用中取得良好的耗能效果。国内的研究起步较晚,不过近些年越来越多的学者开始关注并研究黏滞阻尼器,国内很多的结构物都安置了黏滞阻尼器,取得了不错研究成果和经济效益。对于重要结构物的耗能减震,多数采用国外的先进阻尼器,在技术上我们距离国外先进水平还有一段距离,因此,研究性能良好的黏滞液体阻尼器具有重要的意义。1、通过介绍黏滞液体阻尼器的耗能减震理论,从耗能机理这一角度进行分析,对比了现有的几种不同构造形式的黏滞液体阻尼器的工作性能及其优缺点,并介绍黏滞液体阻尼器的恢复力模型及国外研究者给出的计算公式。基于普通黏滞阻尼器的基础上,开发研制出了一种新型黏滞液体阻尼器,对其进行了大量的力学性能试验。2、研究了加载频率、加载位移、可调预紧力和粘性介质对阻尼输出力的影响,通过恢复力模型回归标定了阻尼器的性能参数,并且根据试验结果对阻尼器设计进行了改进。3、利用Midas/civil大型有限元软件对安置黏滞阻尼器的桥梁试验模型进行了地震时程分析,结果表明设置黏滞阻尼器后结构的减振效果十分显著。通过分析不同参数下不同减震效果的曲线,得到优化后的阻尼器参数。最后,根据试验结果和建模结果相互对比,验证新型黏滞阻尼器的可行性。
[Abstract]:Energy dissipation technology refers to the installation of energy dissipation and damping devices in the appropriate position of the structure. Through these pre-arranged energy dissipation devices, the response of the structure under wind vibration and earthquake can be consumed, so that the seismic energy can be dissipated, so that the structure is protected. Viscous liquid dampers are a new type of energy dissipation and damping device. The research on viscous dampers abroad is early, and good energy consumption effect has been obtained in engineering application. The domestic research started relatively late, but in recent years, more and more scholars began to pay attention to and study viscous dampers. Many domestic structures have been equipped with viscous dampers, and good research results and economic benefits have been obtained. Most of the advanced dampers are used for energy dissipation of important structures. Technically, we are still some distance from the advanced level of foreign countries. Therefore, it is of great significance to study viscous liquid dampers with good performance. 1. By introducing the theory of energy dissipation of viscous liquid dampers, this paper analyzes the energy dissipation mechanism of viscous liquid dampers. The working performance, advantages and disadvantages of several existing viscous liquid dampers with different structures are compared, and the restoring force model of viscous liquid dampers and the calculation formulas given by foreign researchers are introduced. Based on the ordinary viscous dampers, a new type of viscous liquid dampers is developed, and a large number of mechanical properties tests are carried out. 2, the effects of loading frequency, loading displacement, adjustable pretightening force and viscous medium on the damping output force are studied, the performance parameters of the dampers are calibrated by restoring force model regression, and the design of the dampers is improved according to the experimental results. The seismic time history analysis of the bridge test model with viscous dampers is carried out by using Midas/civil large finite element software. The results show that the damping effect of the structure with viscous dampers is very significant. By analyzing the curves of different damping effects under different parameters, the optimized dampers parameters are obtained. Finally, the feasibility of the new viscous dampers is verified by comparing the experimental results with the modeling results.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.3;U446

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