屋盖MRD隔震升船机结构模型振动台试验

升船机结构塔柱平台处的刚度突变会引起升船机顶部厂房强烈的地震鞭梢效应,在升船机结构模型上设置屋盖磁流变阻尼器MRD(Magnetorhelogical Damper)隔震系统并进行振动台试验,以验证该系统对控制升船机结构顶部厂房地震鞭梢效应的有效性.设计制作了升船机结构模型和磁流变阻尼器隔震系统,分别进行了原结构模型和屋盖MRD隔震结构模型的振动台试验,并对模型结构的动力特性和振动反应进行了对比分析.试验结果表明:MRD隔震系统改变了模型结构的动力特性,有效地减小了升船机结构模型顶部排架层的层间侧移反应.最后进行了数值分析,并与试验结果进行了比较,验证了屋盖MRD隔震-升船机结构系统力学模型与数值分析方法的正确性.

Shaking table test on ship lifts model with roof MR damper isolation system

The sudden stiffness change on the top of tube towers of ship lifts caused the intensive seismic whipping effect to the top machinery building. To suppress the whipping effect, a roof MRD (magnetorhelogical damper) isolation system were presented. The structure model of ship lifts and MRD isolation system designed, the shaking table tests were carried on a ship lifts structure model with and without the roof MRD respectively. The dynamic characteristics and the responses were compared for these two shaking model. Test results show that the roof MRD isolation system changed the dynamic characteristics of the model structure, the proposed control system is quite valid in reducing seismic responses of top building of the model structure. The validity of the numerical model and analysis method for roof MRD isolation system were verified by the comparisons between the results of the shaking table tests and numerical analysis.