【作者】 罗献燕；

【导师】 蓝文武；

【作者基本信息】 广西大学 ， 结构工程， 2008， 硕士

【摘要】 滑移隔震体系是一种较早在实际中运用的抗震结构形式,它的基本原理就是使得滑移层将基础和上部结构分开,滑移层在地震过程中的相对滑移,延长了结构的自振周期,减小了地震作用,改变了传统结构依赖增加自身结构的强度和刚度来抵抗地震作用的抗震模式,有着显著的减震性能,然而由于对其研究仍有很多问题需要解决,因此该隔震体系在实际工程中的推广应用受到限制。本文在前人的研究基础上,就滑移隔震体系做了以下研究工作:首先在对滑移隔震体系进行一系列的调研工作后,了解了滑移隔震体系的研究以及工程应用的现状,明确了当前面临的关键问题,确定了本论文的研究方向。其次,根据地震地面运动的功率谱,采用等效线性化方法,求得了摩擦基底隔震刚性结构在地震作用下的最大滑移反应的均方反应函数,并把它无量纲化,建立求解体系的最优参数的参数分析方法。分析表明隔震结构的地震反应(包括滑移量)不仅与限位阻尼器的刚度有关,还与隔震体系的上部结构的总质量与隔震装置的质量比有关,体系的参数存在一个最优取值区间。在此基础上,选择了一个优化后的质量比值,建立了双自由度隔震体系,选择正确的滑移摩擦力模型,基于动力运动学,建立了滑移隔震反应谱动力方程。并运用控制工程中的仿真研究工具Simulink以及Stateflow编制了滑移反应谱的仿真分析模型,求解并获得了滑移隔震体系的一系列反应谱,为滑移隔震体系的工程应用提供依据。最后,采用复模态理论求解滑移隔震体系的地震反应,并在算例分析中运用了前面章节所求得的平均反应谱,并将其分析结果与采用规范的非隔震反应谱求得的结果进行比较。分析表明虽然得出的滑移隔震反应谱仍有待改进,但已具有较好的实际应用的价值。更多还原

【Abstract】 Sliding isoltation system is used earlier in anti-seismic structure, It can extend natural period of structure and reduce earthquake response by use of sliding story which separate base and top structure in the earthquake .It show obviously effect by change traditionally active control model that improving stiffness and strength of struacture to reduce earthquake response. But the research on sliding system is still weak now, and many problems have not been real resolved, which making it developed slowly in the system of promotion by the earthquake.Based on the previous study, this paper takes work on some research of sliding base isolation system and make the following conclusions:First, after read a lot of Chinese and foreign literature ,make a series of research work on the system of sliding, detailed on the sliding system of the status and the current key issues facing. And determined the main work of the papers.Then, the earthquake ground motion in accordance with the power spectrum, using the equivalent linear method to obtain the rigid structure of friction in the basement isolation under earthquake response of the biggest slip square reaction function, and dimensionless.Establish the parameters Analysis of the objective function, use matlab programming analysis. Analysis showed that the slipment of isolation structural not only according to the stiffness for limit displaysment restrainer, but also ratio of upper structure total mass and isolation system. There is an optimal value.On this basis, the choice of a optimize the quality ratio, the establishment of a dual-degree of freedom isolation system ,to choose the correct slip friction model. Based on the momentum kinematics established a sliping response spectrum dynamic equation. Use advanced engineering tools—simulink and stateflow. produced a slip response spectrum analysis of the simulation model. Solving the sliding system of a series of response spectrum. Finally, lotus root for sliding system, and make a example for use the average response spectrum which was maked in front of chapters, and compared with standardize non-isolated response spectrum, then make the conclusions is that sliding response spectrum can be applicated in the engineering.更多还原