大跨度舞台的动力分析及舒适度评价

采用通用有限元软件MIDAS,通过对大跨度舞台结构开展竖向动力分析,获得了5种常见工况下舞台结构的竖向振动峰值加速度;参考人行天桥相关规范中的舒适度评价指标,分析评价了舞台结构的舒适度;对比分析杆件应力、竖向挠度等设计指标,验证了结构设计时采用静力荷载乘以放大系数等效动力荷载的方法是比较可行的.

Dynamic Analysis and Comfort Evaluation of Large-span Stages

Using MIDAS finite element software,through the development of vertical force on long span stage structure analysis,5 types of vertical vibration acceleration stage structure under the condition of are obtrained;According to the relative standard of comfort evaluation index of pedestrian bridge,structure of the stage comfort is analyzed and evaluated. By the contrast of design index of member stress and vertical deflection,it turns out the design method by static load multiplied by the magnification coefficient of equivalent dynamic load is feasible.