振动台基础振动对厂房的影响

发布时间：2018-04-27 17:59

本文选题：动力机器基础 + 地震模拟振动台　；参考：《苏州科技学院》2015年硕士论文

【摘要】：地震模拟振动台试验是工程抗震的方法之一，它能较好地模拟结构振动反应过程和不同类型的人工地震波，以达到研究结构的动力特点、地震反应、破坏机理和检验设备抗震性能的目的。地震模拟振动台在工作时其基础产生的振动会对周围土体、厂房结构和工作人员的工作条件等造成影响，因此有必要对振动台工作时由于基础产生的振动对周围环境的影响进行研究。本文以苏州科技学院在建6×8m地震模拟振动台为研究对象，研究该地震模拟振动台基础振动对周围环境的影响，主要工作内容如下： 1、详细介绍了地震模拟振动台设备的构造、原理以及振动台基础在设计时要考虑的因素。 2、根据振动台基础设计图纸和地质勘察报告中的土质参数，按照《动力机器基础设计规范》中的方法计算了基础的动力响应，采用Abaqus软件建立了地基-振动台基础的三维模型，对振动台基础的动力响应进行了有限元模拟，并对这两种计算结果做了对比，得出：利用《动力机器基础设计规范》方法得到的振动台基础加速度反应大于有限元法计算的结果。 3、建立了地基-振动台基础-厂房结构三维有限元实体模型，进行了振动台基础振动对厂房影响的动力响应有限元模拟，并参照《高层建筑混凝土结构技术规程》中关于“人体舒适度与建筑物加速度之间的关系”，得出：振动台基础的振动对厂房结构的影响符合要求，在某些频段内，工作人员有振动感觉，但影响不大。 4、考虑土质参数不确定性因素，比较了不同土层参数下振动台基础振动对厂房的影响，对比发现：厂房的加速度响应会随着土层参数的改变在低频区和高频区发生不同的变化，，最大加速度反应对应的频率会随着土质的变硬而增大。
[Abstract]:Seismic simulation shaking table test is one of the methods of engineering earthquake resistance. It can simulate the structural vibration response process and different types of artificial seismic waves, so as to study the dynamic characteristics of the structure and the seismic response. The failure mechanism and the purpose of testing the seismic performance of the equipment. The vibration produced by the foundation of the shaking table in earthquake simulation will have an impact on the surrounding soil, the structure of the factory building and the working conditions of the workers, etc. Therefore, it is necessary to study the effect of the vibration caused by the foundation on the surrounding environment. In this paper, the 6 脳 8m earthquake simulation shaking table under construction in Suzhou Institute of Science and Technology is taken as the research object, and the influence of the foundation vibration of the earthquake simulation shaking table on the surrounding environment is studied. The main work is as follows: 1. The structure and principle of the shaking table equipment for earthquake simulation and the factors to be considered in the design of the shaking table foundation are introduced in detail. 2. According to the soil parameters in the foundation design drawing and geological survey report, the dynamic response of the foundation is calculated according to the method in the Code for Design of dynamic Machine Foundation, and the three-dimensional model of the foundation of the shaking table is established by using Abaqus software. The dynamic response of shaking table foundation is simulated by finite element method, and the results are compared with each other. It is concluded that the acceleration response of vibration table foundation obtained by the method of "Design Code for Power Machine Foundation" is greater than that calculated by finite element method. 3. The three-dimensional finite element model of the foundation, vibration table foundation and factory building structure is established, and the dynamic response of the vibration table foundation to the powerhouse is simulated by finite element method. Referring to the relation between the comfort of human body and the acceleration of the building in the Technical Specification for concrete structures of High-rise buildings, it is concluded that the vibration of the foundation of the shaking table meets the requirements for the structure of the powerhouse, and in some frequency bands, Staff members have a sense of vibration, but the impact is small. 4. Considering the uncertainty of soil parameters, the effects of shaking table foundation vibration on the powerhouse under different soil parameters are compared. The results show that the acceleration response of the building varies with the change of soil parameters in the low frequency region and the high frequency region. The frequency corresponding to the maximum acceleration response increases with the hardening of the soil.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P315.9

【参考文献】