基于能量原理的消能减震高层结构减震控制研究

发布时间：2018-05-05 21:30

本文选题：消能减震 + 减震控制　；参考：《沈阳工业大学》2017年硕士论文

【摘要】：随着土木工程的发展,人类关于建筑结构抵抗地震作用的思想不断更新,目前已经从单纯的结构抗震转变到结构抗震与减震控制相结合的抗震设计思路上来了。工程实践证明,当结构进行被动减震控制时,添加阻尼器的消能减震结构具有很好的抗震性能。目前,无论消能减震理论分析,还是结构减震控制研究的还不够充分,本课题基于能量平衡抗震理论,开展钢筋混凝土高层结构的消能减震理论分析及其减震控制研究。本文基于能量平衡原理,以一个十二层框架钢筋混凝土结构为研究对象,在选定的阻尼器类型和不同地震波的基础之上,运用有限元软件PERFORM-3D对该结构进行了抗震能量弹塑性分析,从地震能量概念出发开展了建筑结构消能减震原理及其减震控制方法研究。首先,基于能量平衡原理研究了消能减震结构在不同地震输入情况下的地震总输入能、地震滞回耗能、结构阻尼耗能和阻尼器耗能规律,并对阻尼器隔层布置以及存在薄弱层的消能减震框架结构分别进行了能量对比分析,相应的地震能量参数均能明确地表征该结构的消能减震效果。在此基础之上,根据工程经验以及不同抗震思想提出了五种减震控制方案,即顶层顺序控制、底层顺序控制、经验顺序控制、层间位移控制和滞回耗能控制等,并基于不同的地震波对五种减震控制方案分别进行了地震输入能、结构耗能以及阻尼器耗能的计算和对比分析。结果表明,顶层顺序控制减震效果相对不够明显;底层顺序控制、经验顺序控制与层间位移控制,随着控制步数增加结构震动指标明显降低,其中层间位移控制法要略优于其他两种;滞回耗能控制法,对于结构消能减震效果显著,在所选的不同地震波作用下各项减震指标均优于其他控制方法,且在减震耗能指标的表征上和减震阻尼器的布置方法上更具有一般性和普遍性。研究表明,基于能量平衡原理的理论用于减震控制分析,与现有方法相比较更为科学合理,可为实际工程提供参考。
[Abstract]:With the development of civil engineering, the idea of anti-earthquake action of building structure has been updated constantly. At present, the idea of aseismic design has been changed from simple structure aseismic design to the combination of structural aseismic and seismic control. The engineering practice shows that the energy dissipation structure with dampers has good seismic performance when the structure is controlled by passive vibration absorption. At present, neither the theoretical analysis of energy dissipation nor the study of structural control is sufficient. Based on the energy balance seismic theory, the theoretical analysis of energy dissipation and seismic control of reinforced concrete high-rise structures is carried out in this paper. Based on the principle of energy balance, this paper takes a 12-story frame reinforced concrete structure as the research object, based on the selected damper type and different seismic waves. The seismic energy elastic-plastic analysis of the structure is carried out by using the finite element software PERFORM-3D. Based on the concept of seismic energy, the principle of energy dissipation of building structure and its control method are studied. Firstly, based on the principle of energy balance, the total input energy, the hysteretic energy dissipation, the damping energy dissipation and the damper energy dissipation of the energy dissipation structure under different earthquake input conditions are studied. The energy analysis of the energy dissipation frame structure with weak layer and the spacer layout of the damper is carried out respectively. The corresponding seismic energy parameters can clearly characterize the energy dissipation effect of the structure. On this basis, according to the engineering experience and different anti-seismic ideas, five kinds of seismic control schemes are put forward, that is, top floor sequence control, bottom layer sequence control, empirical sequence control, floor displacement control and hysteretic energy dissipation control, etc. On the basis of different seismic waves, the calculation and comparative analysis of seismic input energy, structural energy dissipation and damper energy dissipation are carried out for five kinds of shock absorption control schemes. The results show that the effect of sequential control on the top floor is not obvious enough, and the vibration index of the structure decreases obviously with the increase of the control step, the sequence control of the bottom layer, the control of the empirical sequence and the control of the displacement between the layers. Among them, the interstory displacement control method is slightly superior to the other two methods, and the hysteretic energy dissipation control method has a remarkable effect on the energy dissipation and seismic absorption of the structure, and each damping index is superior to other control methods under the action of different seismic waves. Moreover, it is more general and universal in the characterization of the energy dissipation index and the arrangement method of the damper. The results show that the theory based on the energy balance principle is more scientific and reasonable than the existing methods, and can be used as a reference for practical engineering.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.31

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