高层结构设置TMD阻尼器减震效果的研究

发布时间：2018-03-13 21:38

本文选题：TMD　切入点：高层结构　出处：《河北联合大学》2013年硕士论文　论文类型：学位论文

【摘要】：当地震发生时，高层结构就像一个反应放大器，随高度的增加，振动的振幅逐渐增大，高层以及超高层结构在地震作用下的反应将会直接影响到人民的生命和财产安全，同时，高层结构一旦破坏或者倒塌将会造成难以想象的次生灾害。因此，控制高层结构在地震作用下的反应就显得尤为重要。调谐质量减震系统（TMD等）对于层数较多，高度较大，主振型比较明显、稳定的多层、高层、超高层结构都有较好的减震效果，且该技术减震机理明确，虽然理论验算不多，但却已取得较多的试验成果，并已在某些工程中得到应用。针对理论验算不足的现状对高层结构应用TMD的减震效果进行验算，指出TMD不同的放置方法对减震效果的影响。通过Lagrange方程推导出未采取任何减震措施、只在顶部放置TMD阻尼器及顶部和中部均放置TMD阻尼器三种情况的高层结构在地震动作用下的运动方程，，根据Runge-Kutta法，利用MATLAB语言编制计算软件，求解运动方程。将上述三种情况的位移、速度、加速度、弯矩等数据进行对比分析。分析表明，影响TMD减震效率的因素有阻尼系数、摩擦系数、弹簧系数和调谐质量。在四个影响因素中，阻尼系数对TMD减震效率的影响最大。使用TMD的高层结构各参照点的控制变量明显小于未使用减震器的各变量，TMD起到了较好的减震效果。但针对不同的基底激励，单独在顶部放置TMD阻尼器和顶部、中部均放置TMD阻尼器的减震效果不同。总体来说，顶部、中部均放置TMD的减震效果优于仅在顶部放置TMD的情况，但针对200m的高层结构，以上两种情况减震效率均在50%以上。
[Abstract]:When the earthquake occurs, the high-rise structure is like a response amplifier. With the increase of height, the amplitude of vibration increases gradually. The response of high-rise and super-high-rise structures under earthquake action will directly affect the lives and property safety of the people, at the same time, Once the high-rise structure is destroyed or collapsed, it will cause unimaginable secondary disasters. Therefore, it is very important to control the response of high-rise structure under earthquake. The tuned mass damping system (TMD, etc.) has better damping effect for multi-storey, high-rise and super-high-rise structures with more layers, larger height, more obvious main vibration modes and stable multi-storey, high-rise and super-high-rise structures, and the mechanism of this technique is clear, although the theoretical checking calculation is not much. However, more experimental results have been obtained and have been applied in some projects. In view of the current situation of insufficient theoretical checking calculation, the seismic absorption effect of the application of TMD in high-rise structures is checked and calculated, and the effect of different placement methods of TMD on the seismic absorption effect is pointed out. Through the Lagrange equation, the motion equations of high-rise structures with TMD dampers at the top and TMD dampers at the top and the middle of the structures under ground motion are derived. According to the Runge-Kutta method, the equations of motion of high-rise structures under ground motion are derived. The calculation software is compiled by MATLAB language to solve the equation of motion. The data of displacement, velocity, acceleration and bending moment of the three cases mentioned above are compared and analyzed. The analysis shows that the factors influencing the efficiency of TMD vibration absorption are damping coefficient, friction coefficient, etc. Spring coefficient and tuning mass. Of the four factors, The damping coefficient has the greatest effect on the damping efficiency of TMD. The control variables of the reference points of the high-rise structures using TMD are obviously smaller than those of the ones without the absorber. However, for different base excitations, the damping coefficient has a better effect on the damping efficiency. TMD dampers and top dampers are placed at the top alone, and the damping effects of TMD dampers in the middle are different. In general, the damping effect of placing TMD at the top and the middle is better than that of only placing TMD at the top, but for 200m tall structures, In both cases, the damping efficiency is more than 50%.
【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.31

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