钢结构大跨度楼盖减振控制及现场测试

VIBRATION REDUCTION CONTROL AND FIELD TEST OF LONG-SPAN STEEL STRUCTURE FLOOR

通过对沈阳站站房大跨度楼盖的人致振动响应分析,引入遗传算法并以减振率为目标函数,对"人-结构"耦合系统的TMD数量进行优化设计,以寻求大跨楼盖的减振控制方法。对安装TMD的大跨楼盖进行跟踪测试,分别进行减振前的动力特性测试、减振装置安装前后人群步行荷载激励下的振动响应测试。测试结果表明:大跨楼盖经TMD优化设计后具有良好的减振效果,验证了减振控制方法的正确性和合理性。

Through the human-induced vibration response analysis for the long-span floor of the Shenyang station,by introducing genetic algorithm and taking the vibration reduction rate as the objective function,the optimization design of the TMD quantity of the ＂human-structure＂coupling system was carried out to seek the vibration control method of long-span floor. The tracking tests of the long span floor with TMD were carried out,dynamic characteristic test before vibration was carried out,as well as the vibration response test of the pedestrian loads before and after vibration,the test results showed that the long-span floor after the optimum design of TMD had a good damping effect,which verified the vibration control method of correctness and rationality.