高烈度地震山区中等跨度梁桥抗震韧性设计

Design of Seismic Resilience for Medium-span Beam Bridge in High-intensity Earthquake Mountainous Area

摘要:

为适应高烈度地震山区多灾害的高速公路建设条件，基于梁桥体系的轻型化、标准化、工厂化，以及高韧性、高抗震能力的设计理念，开发了60～80 m跨径的分离式钢箱组合梁与钢管混凝土桁式墩组合体系梁桥。该组合体系梁桥采用的轻型结构和整跨顶推箱梁的快速施工技术，为复杂山区条件下的中等跨径梁桥建设提供新的思路，并从结构、材料、体系三个不同维度提出抗震韧性技术的成套解决方案，提升中等跨径梁桥的综合抗灾能力。

Abstract:

To adapt to the construction conditions of expressways in mountainous areas with high-intensity earthquakes and multiple disasters, based on design concept of lightweight, standardization, factory-like, high resilient and seismic capacity, the separate steel box composite beam with 60～80 m span and CFST truss pier composite system beam bridge has been developed. The rapid construction technology of lightweight structure and full-span incremental launching box beam is used for this composite system beam bridge, which provides new ideas for the construction of medium-span beam bridges in complex mountainous area. A complete set of solutions is proposed for seismic resilience technology from three different dimensions of structure, materials and systems, which enhances the comprehensive disaster resistance capacity of medium-span beam bridges.