调谐质量阻尼器(TMD)在大跨斜拉桥减震控制中的应用

将调谐质量阻尼器(TMD)运用于润扬北汊斜拉桥地震反应控制。给出了TMD的减震机理及其力学分析模型,建立了TMD-斜拉桥地震反应控制系统的有限元模型,并进行了TMD对斜拉桥减震效果分析。分析发现,TMD使斜拉桥结构的阻尼耗能减少了30%,主梁跨中和端部的横向位移减少了12%,竖向位移减少了24%。结果表明,调谐质量阻尼器能有效的控制大跨斜拉桥在地震作用下的振动。

APPLICATION OF TUNED MASS DAMPER FOR CONTROLLING VIBRATION OF A STAYEDCABLE BRIDGE UNDER EARTHQUAKE EXCITATION

Tuned mass damper(TMD) is used for control the vibration response of the north cable-stayed bridge of Runyang under earthquake excitation.The dynamical model of this TMD-cable-stayed bridge system and its vibration-mitigated are presented.The FEM model of this TMD-cable-stayed bridge structure is set up,and the vibration-mitigated effect of TMD-cable-stayed bridge structure are analyzed.It is discovered that the damp energy of TMD-cable-stayed bridge can be reduced by 30%,the horizontal and vertical displacements in the middle and end of the beam can be reduced by 12% and 24% respectively.The results indicate that the TMD can control effectively the cable-stayed bridge vibration response under earthquake excitations.