高烈度区城市双层高架桥梁抗震设计新方案

New Scheme of Aseismic Design for Urban Double-deck Elevated Bridge in High-intensity Area

双层桥梁在跨江跨海桥梁、城市高架桥等的应用越来越多。结合某机场航站楼前双层高架桥梁工程设计,着重解决高烈度区、桥面宽度大、净空要求苛刻、施工要求快捷等因素,从结构材料、结构体系、减隔震设计等方面进行多方案比选,并进行空间建模计算,提出的双层框架配合隔震支座的设计新方案,为今后类似桥梁设计提供有益的参考。

The double-deck bridges are more and more applied for river-crossing and sea-crossing bridge, and urban elevated bridges. Combined with the design of the double-deck elevated bridge project in the terminal of an airport, the factors of high-intensity area, large deck width, demanding clearance requireents and fast construction requirements are specially solved. Many schemes are compared and selected from the structural material, structural system, shock insulation design and other aspects. The spatial modeling calculation is carried out. The new design scheme of double-deck frame coordinated with shock insulation is put forward, which provides the beneficial referrence for the design of the similar bridges in the future.