双滑动面DFPS隔震系统效果分析

发布时间：2018-02-13 10:46

本文关键词： DFPS Lagrange方程层间位移摩擦系数龙格-库塔方法　出处：《河北联合大学》2014年硕士论文　论文类型：学位论文

【摘要】：现代隔震技术发展迅速，双滑动面摩擦摆（DFPS）隔震系统是其中一种有效的隔震技术。自从Zayas在1985年提出FPS的概念和初步模型后，很多国内外专家对其进行了理论分析和实验研究，并广泛应用在桥梁与建筑等工程中。DFPS隔震系统在FPS基础上提出，提供了一种新型的模型，DFPS通过滑块在滑道上的摩擦来耗散地震能量，通过中间滑块相应的转动与滑动来适应地震传递给上层结构的位移影响，可以拉长隔震结构的自振周期，达到隔震的功效。因此，影响DFPS隔震系统隔震效果的控制因素有两个，，即滑道半径r和滑道的摩擦系数μ。设定七层框架结构为研究对象，在其基础与上层结构之间设置DFPS隔震系统，通过实际的计算分析其在地震反应下的运动状态，并分析DFPS隔震系统是否具有隔震效果。运用Lagrange方程推导出地震反应下设置DFPS隔震系统和无隔震系统的两种结构的运动方程，并以龙格—库塔法为依据、MATLAB软件为载体求解结构在地震作用下的运动状态。通过比较两种情况下的的最大楼层位移、最大层间位移、最大楼层速度以及最大楼层加速度，来得到DFPS隔震系统在隔震效果最佳时其滑道半径r和摩擦系数μ的最佳组合。通过计算和比较可以得到以下结论：结构的最大楼层位移、最大层间位移、最大楼层速度以及最大楼层加速度均明显减小，说明DFPS隔震系统具有良好的隔震效果，滑道半径r对DFPS隔震效果的影响比较小，摩擦系数μ的影响比较大，当μ的取值在0.01~0.15之间时，DFPS的隔震效果较好。
[Abstract]:The modern isolation technology is developing rapidly, and the double sliding surface friction pendulum (DFPS) isolation system is one of the effective isolation techniques. Since Zayas put forward the concept and preliminary model of FPS in 1985, many experts at home and abroad have carried out theoretical analysis and experimental research on it. And it is widely used in bridge and building engineering. DFPS isolation system is put forward on the basis of FPS, which provides a new model to dissipate seismic energy by friction of slider on slide track. Through the corresponding rotation and sliding of the intermediate slider to adapt to the displacement effect transmitted by the earthquake to the upper structure, the natural vibration period of the isolated structure can be lengthened and the effect of isolation can be achieved. Therefore, there are two controlling factors that affect the isolation effect of the DFPS isolation system. That is, the radius r of the slide track and the friction coefficient 渭 of the slide track. The seven-story frame structure is set up as the research object, and the DFPS isolation system is set up between the foundation and the upper structure. The motion state of the structure under the earthquake response is analyzed by actual calculation. The motion equations of two structures with DFPS isolation system and no isolation system under seismic response are derived by using Lagrange equation. The maximum floor displacement, maximum floor displacement, maximum floor velocity and maximum floor acceleration are compared by using Runge-Kutta method as the carrier software to solve the motion state of the structure under earthquake action, by comparing the maximum floor displacement, the maximum floor displacement, the maximum floor velocity and the maximum floor acceleration. The optimum combination of slip radius r and friction coefficient 渭 of DFPS isolation system is obtained when the isolation effect is optimal. Through calculation and comparison, the following conclusions can be obtained: the maximum floor displacement, the maximum floor displacement, the maximum floor velocity and the maximum floor acceleration of the structure are obviously reduced, which indicates that the DFPS isolation system has a good isolation effect. The influence of slide radius r on the isolation effect of DFPS is relatively small, and the friction coefficient 渭 is greater. When the value of 渭 is between 0.01 and 0.15, the isolation effect of DFPS is better.
【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU352.12

【参考文献】