建筑幕墙地震作用机理及多模式再现试验方法

Seismic Action Mechanism and Multi-modal Reproducing Method of Architectural Curtain Wall

分析了建筑玻璃幕墙受到由主体结构传来的楼层加速度、层间位移变形等地震作用机理,提出了应用模拟地震振动台再现多维地震作用的多模式加载试验方法.针对某吊挂式玻璃幕墙支承结构特点,设计和制作了安装在振动台上的多模式加载装置,实现对该玻璃幕墙的多维加速度动力加载、平面内相对位移及吊杆内力的多模式加载,验证了该方法的有效性和可行性.最后,对应用混合模拟方法研究建筑玻璃幕墙抗震性能进行了探讨.

The seismic action mechanism of the architectural glass curtain wall, including floor acceleration and inter-story drift from main structure, was analyzed. Correspondently, a multi-modal loading test method with shaking table was proposed to reproduce the multi-dimensional seismic actions on the curtain wall simultaneously. To verify its validity and feasibility, an experiment, using a designed multi-modal loading device, was conducted to study the seismic performance of zonal hanging glass curtain wall on a complex high-rise building, which allowed for the synchronous realization of three-direction dynamic acceleration time- history actions, step-by-step loading of horizontal drifts and internal forces of steel sag rods. Finally, the hybrid simulation for the seismic performance of glass curtain-walls was discussed.