滑移隔震限位装置的力学性能及其对隔震技术的推广应用研究

发布时间：2018-06-21 12:22

本文选题：基础滑移隔震 + 先滑后限　；参考：《西安建筑科技大学》2014年硕士论文

【摘要】：基础滑移隔震体系作为一种合理、安全、有效而且经济的减震体系，正在被越来越多的学者所关注。但目前有关滑移隔震限位装置方面的研究资料总体上是比较少的，因此有必要系统地分析限位器的力学性能及其对滑移隔震结构动力响应的影响，从而为滑移隔震技术的推广与应用奠定理论基础。本文首先基于限位消能元件的力学性能，，对限位器的选型进行了初步研究，提出了U型带片和圆锥棒的选型表。将一种新型的涂层材料（二硫化钼）作为本文的摩擦材料，以U型带片为限位消能元件，组成了“一滑就限”的隔震装置和“先滑后限”的隔震装置。其次，运用SAP2000有限元分析软件，以振动台试验模型的原型为研究对象，对三种结构体系在单向地震作用下进行了结构动力响应的对比分析，以验证“先滑后限”的滑移隔震体系在隔震性能方面的优越性。并对“先滑后限”的滑移隔震结构的限位器参数（自滑区长度、限位刚度）与结构地震响应之间的关系展开研究，得出了一些具有参考价值的结论，为限位器的参数优化提供了理论依据。最后，以不规则的钢筋混凝土框架结构为研究对象，通过三种结构体系在双向地震作用下结构动力响应（平动反应和扭转反应）的对比分析，表明“先滑后限”的滑移隔震体系在双向地震作用下具有良好的隔震效果；同时，对于存在明显偏心的不规则结构，采用“先滑后限”的滑移隔震体系后，限位器的刚度布置对减轻结构的扭转振动效应起着重要的作用，而且自滑区的存在使得扭转振动效应通过结构的摩擦滑移得到了调整和改善，从而为结构因扭转而发生整体脆性破坏提供了一种解决思路。
[Abstract]:As a reasonable, safe, effective and economical damping system, base sliding isolation system is being paid more and more attention by more and more scholars. However, there are few research data on sliding isolation device, so it is necessary to systematically analyze the mechanical properties of the limiter and its influence on the dynamic response of sliding isolation structure. Thus, the theoretical basis for the spread and application of sliding isolation technology is established. In this paper, based on the mechanical properties of the limited energy dissipator, the selection of the limiter is studied preliminarily, and the selection table of U type strip and cone rod is proposed. A new type of coating material (molybdenum disulfide) is used as friction material in this paper. The U type strip is used as the limiting energy dissipation element, and the isolation device of "sliding first and then limiting" is made up. Secondly, using SAP2000 finite element analysis software, taking the prototype of shaking table test model as the research object, the dynamic response of three structural systems under unidirectional earthquake is compared and analyzed. In order to verify the superiority of sliding isolation system in isolation performance. The relationship between the parameters of the limiter (self-slip zone length, limit stiffness) and the seismic response of the sliding isolation structure is studied, and some valuable conclusions are obtained. It provides a theoretical basis for the parameter optimization of the limiter. Finally, taking the irregular reinforced concrete frame structure as the research object, the dynamic responses of the three structural systems under the action of bi-directional earthquake (translational response and torsional response) are compared and analyzed. The results show that the sliding isolation system with "first slip and then limit" has good isolation effect under the action of bi-directional earthquake, and for irregular structures with obvious eccentricity, the sliding isolation system with "slip first and then limit" is adopted. The stiffness arrangement of the limiter plays an important role in reducing the torsional vibration effect of the structure, and the existence of the self-slip zone makes the torsional vibration effect adjusted and improved by the friction slip of the structure. This provides a solution for the whole brittle failure of the structure due to torsion.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU470;TU352.12

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