调谐液体阻尼器（TLD）对高层结构抗震性能的影响研究

发布时间：2018-05-03 00:39

本文选题：TLD + 减震控制　；参考：《西安建筑科技大学》2013年硕士论文

【摘要】：高层结构的快速发展，结构高度的不断增加，传统的一味增加结构刚度的方法将很难满足规范对结构控制的要求。结构的振动控制为结构设计开辟了一条新的有效途径。调谐液体阻尼器（TLD）是结构被动控制的一种装置，其结构简单，造价低廉，而且控制效果很好，在结构风振控制中得到了广泛的应用，但是在地震作用下TLD对高层结构的控制技术还不完善。因此本文主要研究TLD对高层建筑地震控制作用的影响。本文首先分析了TLD的减震机理，介绍了TLD理论研究的各种方法，详细分析了各种方法的优缺点，然后选取集中质量法作为后续分析的理论基础，并结合高层结构在地震荷载作用下的动力方程，建立了结构—TLD系统的动力方程。其次通过SAP2000有限元软件建立了实际框架—核心筒模型，对TLD在地震作用下的影响因素进行动力时程分析，研究了质量比、频率比以及TLD作用位置对减震效果的影响规律。得出了在频率比和位置一定时，TLD的减震率随着质量比的增大而增大，待质量比大于3%之后，减震率将逐渐减小；在质量比和位置确定时，减震率随着频率比的增大呈现出类似正态分布的规律，在频率比为0.88左右时，减震率达到最大；在质量比和频率比一定时，将TLD放置在中间位置比放在其他位置的减震率要高。再次分析了实际应用时，合理设计的TLD在不同烈度区的减震效果，得出了使用TLD进行控制的相同结构在不同烈度下的减震率是不同的，高烈度区的减震率大，并得出了在在8度（0.2g）区，TLD对结构的减震作用能起到相对降低地震烈度、提高结构抗震性能的效果。最后整理了本次研究的主要结论，提出了实际设计应用的一点建议和还需要继续深入研究的一些问题。
[Abstract]:With the rapid development of high-rise structures and the increasing of structural height, the traditional method of increasing structural stiffness will be difficult to meet the requirements of structural control. The vibration control of the structure opens up a new effective way for the structure design. TLD (tuned liquid damper) is a kind of passive control device for structure. It is simple in structure, low in cost and good in control effect. It has been widely used in wind vibration control of structure. However, the TLD control technology for high-rise structures under earthquake is not perfect. Therefore, the effect of TLD on seismic control of tall buildings is studied in this paper. In this paper, the mechanism of TLD damping is analyzed, and various methods of TLD theory research are introduced. The advantages and disadvantages of these methods are analyzed in detail, and then the lumped mass method is selected as the theoretical basis of subsequent analysis. Combined with the dynamic equations of tall structures under earthquake load, the dynamic equations of structure-TLD system are established. Secondly, the actual frame-core tube model is established by SAP2000 finite element software, and the dynamic time history analysis of the influencing factors of TLD under earthquake action is carried out, and the influence law of mass ratio, frequency ratio and position of TLD action on the damping effect is studied. The results show that the damping rate of TLD increases with the increase of mass ratio when the frequency ratio and position are fixed. When the mass ratio is greater than 3%, the damping rate will gradually decrease, and when the mass ratio and position are determined, When the frequency ratio is about 0.88, the damping rate reaches the maximum, and when the mass ratio and frequency ratio are fixed, the TLD in the middle position is higher than that in other positions. The effect of the reasonably designed TLD in different intensity region is analyzed again. It is concluded that the damping rate of the same structure controlled by TLD is different under different intensity, and the damping rate in high intensity region is large. It is concluded that TLD can reduce the seismic intensity and improve the seismic performance of the structure in the region of 8 ~ 0.2g. Finally, the main conclusions of this study are summarized, some suggestions for practical design and application and some problems that need to be further studied are put forward.
【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】：2013
【分类号】：TU973.31

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