悬挂系统减震效果分析

发布时间：2018-04-28 10:45

本文选题：悬挂结构 + 减震效果　；参考：《河北联合大学》2014年硕士论文

【摘要】：悬挂建筑是近现代经济发展和科学技术进步的产物，悬挂结构是减震的重要手段之一。自1938年Williams提出了用悬挂方式建筑超高层结构的想法，并拟采用巨型框架悬挂楼层，之后很多学者对其进行了理论和实验的研究，并广泛应用于建筑和桥梁等工程。悬挂结构的受力性能与结构高度、悬挂楼层数、吊杆半径、承载柱截面抗弯刚度、楼层阻尼器阻尼系数因素有关，文章主要讨论各参数对悬挂系统的减震效果分析。首先建立悬挂系统简化模型，以一个14层结构为例，1-7层悬挂在第一刚性杆上，8-14层悬挂在第二刚性杆上，坐标系xoy固定在地面上。根据拉格朗日方程推导悬挂系统的动力反应计算公式，并利用MATLAB语言编制了时程分析程序，输入实际地震动记录和人工波对结构进行动力反应计算分析，通过研究其在地震作用下的运动参数，分析悬挂系统的减震效果。通过实际计算研究其在地震作用下的运动状态，并分析悬挂系统是否有减震效果。通过比较两种情况的最大层间位移、最大楼层位移、最大楼层速度和最大楼层加速度，，得到悬挂系统减震效果最佳时其控制因素的最优组合。通过计算和比较得到以下结论：根据拉格朗日方程建立了承载柱悬挂结构体系的运动方程。悬挂楼段楼层层间位移大幅减小，减震效果接近97%。楼层位移位移沿悬挂楼段高度分布区域均匀；楼层速度与加速度也分别减少。承载柱截面抗弯刚度值对其截面内力与水平位移的影响最显著，当截面抗弯刚度值增大时，截面内力随之增大，水平位移减小；吊杆长度，楼层阻尼器阻尼系数对柱身内力及水平位移的影响较小。
[Abstract]:Suspension structure is the product of modern economic development and scientific and technological progress, and suspension structure is one of the important means to reduce earthquake. Since 1938 Williams put forward the idea of using the suspension mode to build the super high-rise structure and proposed to adopt the mega frame suspended floor. After that many scholars have studied it theoretically and experimentally and widely used in buildings and bridges and other projects. The mechanical properties of the suspension structure are related to the height of the structure, the number of the suspended floors, the radius of the suspension rod, the flexural stiffness of the bearing column section, and the damping coefficient of the floor damper. This paper mainly discusses the analysis of the damping effect of each parameter on the suspension system. Firstly, a simplified model of suspension system is established. Taking a 14-story structure as an example, the 1-7 layer is suspended from the first rigid bar on the 8-14 layer and the coordinate system xoy is fixed on the ground. According to Lagrange equation, the dynamic response calculation formula of suspension system is deduced, and the time-history analysis program is compiled by MATLAB language, and the actual ground motion record and artificial wave are input to calculate and analyze the dynamic response of the structure. By studying the motion parameters of the suspension system under earthquake action, the shock absorption effect of the suspension system is analyzed. The motion state of the suspension system under earthquake action is studied by practical calculation, and whether the suspension system has damping effect or not is analyzed. By comparing the maximum floor displacement, the maximum floor displacement, the maximum floor velocity and the maximum floor acceleration of the two cases, the optimal combination of the control factors is obtained when the suspension system has the best damping effect. By calculation and comparison, the following conclusions are obtained: according to Lagrange equation, the motion equation of bearing column suspension structure system is established. The floor displacement of the suspension section is greatly reduced, and the effect of shock absorption is close to 97. The floor displacement is distributed evenly along the height of the suspended floor, and the floor velocity and acceleration are reduced respectively. The flexural stiffness value of bearing column has the most significant influence on the internal force and horizontal displacement of the bearing column. When the flexural stiffness value of the section increases, the internal force of the section increases and the horizontal displacement decreases. The damping coefficient of the floor damper has little effect on the internal force and horizontal displacement of the column.
【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】：TU351

【参考文献】