考虑支座极限变形的串联隔震体系性能分析与振动台试验研究

发布时间：2018-04-16 13:07

本文选题：串联隔震体系 + 极限变形　；参考：《兰州理工大学》2014年博士论文

【摘要】：近年来,地震的频繁发生给各地震区造成巨大经济损失和人员伤亡,特别是近场地震造成的损失和伤亡更加严重。随着隔震技术的迅速发展和应用,隔震建筑如雨后春笋般涌现出来。由于工程的需要,隔震建筑呈多种发展形式,包括了基础隔震结构、层间隔震结构和复杂的串联隔震结构。对于基础隔震结构和层间隔震结构在建筑抗震规范中已有明显的体现,然而,对于复杂的串联隔震结构的设计在规范中并没有明显针对性的要求。随着串联隔震结构的大量建设,将叠层橡胶支座连接于钢筋混凝土柱顶部形成隔震层的现象比较常见,其被定义为串联隔震体系。对于串联隔震体系的力学性能和试验研究相对较少,特别是在串联隔震体系广泛应用的情况下,对于串联隔震体系的理论和试验研究就显得更加重要。本文在研究此问题的过程中采用渐进式的分析方法,首先分析了不同边界条件下叠层橡胶支座的水平刚度变化,然后对串联隔震体系的水平刚度进行了研究,再针对罕遇地震下叠层橡胶支座的变形特点,对串联隔震体系进行性能分析,同时,用有限元方法和理论分析探讨了串联隔震体系的恢复力模型、质点模型和地震响应,最后对串联隔震体系进行了近场和远场地震下的振动台试验研究,最终完成了整个串联隔震体系的理论和试验研究。本文的主要研究内容包括以下几个方面： 1.针对隔震结构中叠层橡胶支座端部连接的特点,推导了考虑不同边界约束状态下叠层橡胶支座的水平刚度方程,用算例分析了边界条件对叠层橡胶支座的水平刚度的影响,探讨了不同边界条件下端部约束能力和竖向荷载对叠层橡胶支座的水平刚度的影响；然后,对典型的下部边界约束问题的串联隔震体系进行了分析,针对其自身的特点,考虑叠层橡胶支座和钢筋混凝土柱相互作用,在弯-剪-压作用下推导了串联隔震体系的水平刚度方程,对9种普通的叠层橡胶支座对应的串联隔震体系的水平刚度进行了参数分析,提出了简化方程。并针对某一类代表性的叠层橡胶支座对应的串联隔震体系水平刚度方程进行了参数影响分析,与用有限元模型的分析结果进行对比,验证模型的正确性和适用性； 2.针对建筑抗震规范的相关规定隔震层下部结构和构件要进行罕遇地震下变形和承载力验算的要求,进行了以叠层橡胶支座的极限变形为基础,考虑钢筋混凝土柱的不同损伤状态的串联隔震体系的性能分析,讨论了串联隔震体系的性能指标限值,并与静力试验进行了对比； 3.在隔震结构中串联隔震体系以隔震层的形式存在,隔震结构在进行动力计算时串联隔震体系的恢复力模型就较为关键。用有限元软件Marc对带铅芯叠层橡胶支座的串联隔震体系进行了非线性力学性能分析,系统的分析了力和变形关系、等效水平刚度和破坏等力学特性,并与试验部分结果进行了对比分析；基于铅芯叠层橡胶支座的恢复力模型提出串联隔震体系的恢复力模型,探讨串联隔震体系参数对双质点模型和单质点模型的特性的影响,采用单质点模型分析了近场地震作用下串联隔震体系的动力响应和减震效果,探讨了地震动加速度峰值对串联隔震体系减震效果的影响； 4.对串联隔震体系进行了近场和远场地震作用下的振动台试验,研究串联隔震体系的动力响应特点,对比了近场和远场地震作用下串联隔震体系的动力响应,分析了近场和远场地震作用下串联隔震体系的减震效果,探讨了近场地震作用下输入模式对串联隔震体系的减震效果的影响,分析串联隔震体系试验模型的破坏特点和规律,讨论地震动加速度峰值对串联隔震体系减震效果的影响,并用串联隔震体系试验测试的加速时程响应度和位移时程响应与理论模型的计算结果进行了对比。
[Abstract]:In recent years, the frequent occurrence of earthquakes to the earthquake caused huge economic losses and casualties, especially caused by the near field earthquake damage and casualties were more serious. With the rapid development and application of the isolation technology, isolation buildings such as bamboo shoots after a spring rain due to engineering. To isolated buildings in various forms of development, including the base isolation structure, the isolation layer structure and complex structure. The serial isolation for the base isolation structure and interlayer isolation structure has been clearly reflected in the seismic code of buildings, however, for the design of complex structure of the serial isolation in the specification and no obvious specific requirements. With a large number of construction of series isolation structure. The laminated rubber bearing is connected to the top of the reinforced concrete column to form the isolation layer of the more common phenomenon, which is defined as the serial isolation system. The mechanical series isolation system The performance test and research is relatively small, especially widely used in the serial isolation system, it is more important for theoretical and experimental research of series seismic isolation system. This paper in the process of the study of this problem by using asymptotic analysis method, firstly analyzes the stiffness changes under different boundary conditions of laminated rubber bearings then, the horizontal stiffness of series seismic isolation system is studied, and the deformation characteristics of severeearthquake laminated rubber bearings, and the series seismic isolation system performance analysis is conducted, using the finite element method and theoretical analysis of the restoring force model of series seismic isolation system, particle model and seismic response was carried out in the end shaking table test of the near field and far field earthquake of series seismic isolation system, the final completion of the whole series seismic isolation system on the theory and experiment.
The main contents of this paper include the following aspects:
1. for isolated structure with laminated rubber bearing is connected with the end of the characteristics, considering the stiffness equation for different boundary conditions of laminated rubber bearings, analysis of the influence of boundary conditions on the horizontal stiffness of laminated rubber bearing with the example, discusses the influence of different levels of ability and lower end constraint boundary conditions the vertical load of laminated rubber bearing stiffness; then, series seismic isolation system on the lower part of the typical boundary problem are analyzed, according to its own characteristics, considering the laminated rubber bearing and reinforced concrete column interaction in bending and shear compression derived stiffness equation of series seismic isolation system the level of series seismic isolation system 9 common laminated rubber bearings of the corresponding horizontal stiffness parameters were analyzed, proposed a simplified equation. And the laminated rubber bearings are a kind of corresponding representative series The parameter influence analysis of the horizontal stiffness equation of the coupling isolation system is analyzed and compared with the analysis results of the finite element model to verify the correctness and applicability of the model.
2. according to the relevant provisions of the code for seismic design of buildings of the lower isolation layer structure and component to deformation and bearing capacity checking under rareearthquake requirements, carried out in order to limit the deformation of laminated rubber bearing based performance analysis of series seismic isolation system with different damage state of reinforced concrete column considering the discusses performances of series seismic isolation system the limit value, and compared with the static test;
3. in base isolated structure series seismic isolation system exists in isolation layer in the form of series isolation structure model of restoring force of the isolation system is the key in dynamic analysis. The analysis of nonlinear mechanical properties by finite element software Marc series seismic isolation system with lead laminated rubber bearings, systematic analysis of the stress and deformation relationship between equivalent horizontal stiffness and failure mechanics characteristics, and compared with the results based on test; lead rubber bearings of the restoring force model proposed restoring force model of series seismic isolation system, to explore the influence of system parameters on the vibration characteristics of double mass model and single particle model with single particle series. Model analysis of the dynamic response and damping effect of series seismic isolation system of near field earthquake, discusses the influence of peak acceleration of series seismic isolation system damping effect;
4. of the serial isolation system for the shaking table test of near field and far field earthquake, the dynamic response characteristics of the serial isolation system, power series seismic isolation system of near field and far field seismic response comparison, analysis of damping effect of near field and far field earthquake series vibration system. To investigate the effect of the input mode of the near-field seismic damping effect of series seismic isolation system, analysis of failure characteristics and rules of series test model of isolation system, discuss the peak acceleration effect on series seismic isolation system damping effect, and accelerated test series isolation system response and displacement response calculation with the theoretical model results were compared.

【学位授予单位】：兰州理工大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU352.12

【参考文献】