扬州运河大剧院连体结构减隔震设计

Design of seismic isolation and earthquake reduction for the connecting structure of Yangzhou Yunhe Grand Theater

扬州运河大剧院整体由东西两部分建筑构成,两侧建筑在地上部分通过55.00~63.40m跨度的大型空中连桥连通。结构设计采用两榀钢结构桁架作为空中连桥的主要承重结构,桁架两端支座通过参数化的分析和比较,优选了摩擦摆支座和限位阻尼器与两侧的塔楼结构连接,使连桥结构形成弱连体结构,减小了连体结构对两侧塔楼的影响。分析结果表明,在地震作用下摩擦摆支座能够有效降低连体结构底部的水平剪力,限位阻尼器的设置不仅进一步降低了连体结构底部的水平剪力,同时减小了连体结构与两侧塔楼的相对变形。

The Yangzhou Yunhe Grand Theater is composed of the east building and the west building.The two buildings above ground are connected by a large air bridge with a span of 55.00~63.40m.Two steel trusses are designed as the main load-bearing structure of the air bridge.By the parametric analysis and comparison of the supports at both ends of the truss,friction pendulum supports and displacement-limiting dampers were optimized to connect with the east and west buildings.The air bridge structure was formed into a weakly connecting structure,which reduces the impacts of the connecting structure on the two building on both sides.The analysis results show that the friction pendulum bearings can effectively reduce the horizontal shear force at the bottom of the connecting structure under the action of earthquake,and the displacement-limit dampers can not only further reduce the horizontal shear force at the bottom of the connecting structure,but also reduce the relative deformation between the connecting structure and the building on each side.