惯性减振和基础隔震混合控制研究

发布时间：2018-08-22 13:35

【摘要】：隔震结构是最为常见的减震方式之一,通过设置隔震层可以有效减小上部结构的地震反应,但同时隔震层也将承担较大的位移反应,这往往成为隔震结构设计时的主要限制因素。通过在隔震结构上加装调谐质量阻尼器(TMD)可以在一定程度上减小隔震层的位移反应,但是其减震效果受到质量比的限制。基于此,本文拟对一种新型的惯性减振装置(旋转惯性双重调谐质量阻尼器(RIDTMD))和基础隔震混合控制结构进行地震作用下的响应分析。RIDTMD在传统的弹簧单元和阻尼单元外又加入了质量单元,利用质量单元的旋转惯性进行减震,从而实现较大的表观质量,使减震效率和鲁棒性均有所提高。以某8层基础隔震结构为算例,研究了RIDTMD对混合控制体系控制效果的影响,并对TMD与惯性减振装置在隔震结构中的减震效果进行了比较。
[Abstract]:Isolation structure is one of the most common ways to reduce the seismic response of the superstructure by setting the isolation layer, but at the same time, the isolation layer will also bear a large displacement response. This is often the main limiting factor in the design of isolated structures. The displacement response of the isolation layer can be reduced to a certain extent by adding tuned mass damper (TMD) to the isolated structure, but the damping effect is limited by the mass ratio. Based on this, In this paper, a new type of inertial vibration absorber (rotating inertial dual tuned mass damper (RIDTMD) and base-isolated hybrid control structure is proposed to analyze the response under seismic action. RIDTMD adds mass element to the traditional spring element and damping element. The rotational inertia of the mass unit is used to reduce the vibration, so that the apparent mass can be achieved, and the efficiency and robustness of the vibration absorption can be improved. The effect of RIDTMD on the control effect of hybrid control system is studied by taking an 8-story base isolated structure as an example, and the effect of TMD and inertial vibration absorber in isolation structure is compared.
【作者单位】：同济大学结构工程与防灾研究所;
【分类号】：TU352.12;TU435

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