基于OpenSEES和MTS的混合试验研究及应用

发布时间：2018-05-27 20:35

本文选题：混合抗震试验 + 有限元OpenSEES　；参考：《新疆大学》2017年硕士论文

【摘要】：建筑结构抗震试验一直是结构工程研究领域里的一个热点和难点,结构抗震研究要求结构在模拟地震荷载作用下进行承载工作,以观测结构的承载能力、局部或整体变形、非线性能和结构的实际破坏特点等,最终能将试验结果运用到工程中去。但是现代建筑的结构形式愈发奇特和复杂,建筑高度也频繁刷新纪录,传统的抗震试验研究方法已经不能满足应用精度和效率的要求。因此,寻求高效准确的试验方法是关键的切入点,基于有限元软件和MTS试验加载系统的混合抗震试验方法就是在此基础上提出的。目前该方法已经在工程抗震领域引起广泛关注和应用,并且已经取得了许多突破性成果。正因如此,本文建立了基于OpenSEES和MTS混合试验系统,并初步开展了验证性试验。主要内容如下:(1)对常规的抗震研究方法进行了概括和分析,并介绍了抗震混合试验方法的原理、系统构成软件和设备以及国内外研究和发展现状。(2)在我校结构工程实验室已有设备的基础上,利用试验通讯平台OpenFresco,实现有限元软件OpenSEES和实验室MTS加载控制系统的对接,形成集有限元数值计算和物理试验同时进行的混合系统。(3)利用该系统针对一单层钢框架开展拟动力混合试验,将混合试验的结果与数值模拟的结果对比分析,验证该实验室混合试验系统的有效性和可行性。(4)在混合试验系统的基础上,进一步研究了试验构件初始刚度和边界条件的模拟对试验结果的影响。研究结果表明:基于OpenSEES和MTS的混合试验系统能够完成子结构混合试验,满足试验的精确度和可行性,子结构试验可以代替整体结构试验;构件的初始刚度和边界条件的精确模拟均会对试验效果带来偏差。
[Abstract]:Seismic test of building structure is always a hot and difficult point in the field of structural engineering. Structural seismic research requires the structure to work under simulated earthquake load in order to observe the bearing capacity, local or integral deformation of the structure. The nonlinear energy and the actual failure characteristics of the structure can be applied to the engineering. However, the structural forms of modern buildings are becoming more and more peculiar and complex, and the height of buildings frequently sets new records. The traditional seismic test research methods can not meet the requirements of application accuracy and efficiency. Therefore, it is a key point to seek efficient and accurate test methods. The hybrid seismic test method based on finite element software and MTS test loading system is put forward on this basis. At present, the method has been widely concerned and applied in the field of engineering earthquake resistance, and many breakthrough results have been obtained. For this reason, a hybrid test system based on OpenSEES and MTS is established, and a validation test is preliminarily carried out. The main contents are as follows: (1) the conventional seismic research methods are summarized and analyzed, and the principle of seismic mixed test method is introduced. On the basis of the existing equipment in our university's structural engineering laboratory, the finite element software OpenSEES and the laboratory MTS loading control system are connected with each other by using the test communication platform OpenFresco. the system is composed of software and equipment, as well as the research and development status at home and abroad. A hybrid system of finite element numerical calculation and physical test is formed. The system is used to carry out pseudo-dynamic mixing test for a single-layer steel frame. The results of the mixed test are compared with the results of numerical simulation. To verify the validity and feasibility of the hybrid test system in this laboratory. (4) on the basis of the hybrid test system, the effects of the initial stiffness and boundary conditions of the test members on the experimental results are further studied. The results show that the hybrid test system based on OpenSEES and MTS can complete the substructure mixing test, satisfy the accuracy and feasibility of the test, and the substructure test can replace the whole structure test. Both the initial stiffness and the accurate simulation of the boundary conditions will bring deviation to the experimental results.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11

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