橡胶—质量系统的子结构振动台试验方法研究

发布时间：2018-08-01 10:18

【摘要】：高层建筑在遭遇地震作用时,结构的响应随着高度的增加而增大。为了研究结构并未发生损坏时建筑物内设备和设施的安全性,地震模拟振动台试验是最直接最准确的方法。但受到振动台台面尺寸和最大承载能力的限制,通常只能做一些小比例模型试验,尺寸效应将会严重影响试验结果的真实性。采用子结构试验方法可以解决振动台台面尺寸及最大承载能力对试件尺寸的限制,但是对振动台最大加速度提出了更高要求。特别是研究顶层建筑物的地震反应,采用子结构试验,振动台需要施加的加速度超过振动台最大加速度要求。为了解决上述问题,本文在子结构振动台试验的基础上,通过引入橡胶-质量系统来放大地面运动作用,对橡胶-质量系统的子结构振动台试验方法展开了研究,具体内容如下：(1)阐述了振动台的发展与应用,对子结构振动台试验方法进行了归纳总结,并对子结构振动台试验方法的国内外研究现状作了介绍。(2)阐述了橡胶-质量系统的放大原理以及传递函数的方法,并通过一个算例验证了传递函数的准确性。(3)通过SAP2000有限元软件建立20层整体结构模型以及顶部2层子结构模型,并加入橡胶-质量系统,结合传递函数的方法,采用3条地震波进行了研究,验证了橡胶-质量系统的子结构振动台试验方法的准确性。(4)基于WS-Z30-40小型振动台,对一个6层整体结构以及带有橡胶-质量系统的2层子结构进行了试验,研究了橡胶-质量系统的放大作用,定性地验证了橡胶-质量系统的子结构振动台试验方法的可行性。橡胶-质量系统的子结构振动台试验方法有助于弥补振动台最大承载能力、台面尺寸对试件尺寸的限制以及振动台在最大加速度等方面的限制,是研究结构在遭遇较大加速度地震作用时一种较好的试验方法,能够促进子结构振动台试验方法的发展。
[Abstract]:When tall buildings are subjected to earthquake, the structural response increases with the increase of height. In order to study the safety of equipment and facilities in buildings without damage seismic simulation shaking table test is the most direct and accurate method. However, due to the limit of the table surface size and the maximum bearing capacity, only some small scale model tests can be done, and the dimension effect will seriously affect the authenticity of the test results. The substructure test method can be used to solve the limit of the table surface size and the maximum bearing capacity to the specimen size, but the higher requirement for the maximum acceleration of the shaking table is put forward. In particular, the seismic response of the top building is studied. The vibration table needs to apply more acceleration than the maximum acceleration of the vibration table by substructure test. In order to solve the above problems, based on the substructure shaking table test, this paper studies the substructure shaking table test method of the rubber mass system by introducing the rubber mass system to enlarge the ground motion. The main contents are as follows: (1) the development and application of vibration table are described, and the test methods of sub-structure shaking table are summarized. The research status of substructure shaking table test methods at home and abroad is also introduced. (2) the amplification principle of rubber mass system and the method of transfer function are expounded. The accuracy of the transfer function is verified by an example. (3) the whole structure model of 20 stories and the sub-structure model of the top two layers are established by SAP2000 finite element software, and the rubber mass system is added to combine the method of transfer function. The accuracy of substructure shaking table test method of rubber mass system is verified by using three seismic waves. (4) based on WS-Z30-40 small shaking table, A six-layer structure and a two-layer substructure with a rubber-mass system were tested. The amplification of the rubber-mass system was studied and the feasibility of the substructure shaking table test method of the rubber-mass system was qualitatively verified. The test method of substructure shaking table of rubber mass system is helpful to make up for the limit of the maximum bearing capacity of the shaking table, the limit of the size of the table to the specimen size, and the limit of the maximum acceleration of the shaking table, etc. It is a better test method to study the structure subjected to large acceleration earthquake, which can promote the development of substructure shaking table test method.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.31

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