上海青浦华为1号桥设计

Design of Shanghai Qingpu Huawei No.1 Bridge

摘要:

上海青浦华为1号桥为中承式拱梁组合体系，两侧拱肋朝内倾斜74°，拱肋与梁体固结，跨径布置为（47.343+90+41.934） m，拱轴线矢高f=24.9 m，矢跨比为f / l=1/3.61。吊索两侧与斜拱肋对齐布置，共设9组拉索，拉索梁上间距6 m。桥梁不单独设置桥台，梁体两侧均搭在建筑结构上。桥梁拱肋为钢拱，梁体为钢箱梁，梁拱组合，下部结构采用承台桩基础。设计BIM技术进行辅助正向设计，确保结构设计的合理性；采用MIDAS Civil进行结构性能分析，结算表明该桥受力性能满足规范要求。该桥采用先梁后拱的总体施工方案。

关键词:钢拱;中承式;梁拱组合;BIM辅助设计

Abstract:

Shanghai Qingpu Huawei No.1 Bridge is a half-through arch beam composite system with both sides of the arch ribs tilting inward at an angle of 74°. The arch ribs are consolidated with the beam body. Its span layout is (47.343+90+41.934) m. The arch axis rise is f = 24.9 m. The vector span ratio is f / l = 1/3.61. The two sides of the suspension cable are aligned with the inclined arch ribs, and a total of 9 sets of cables are set. The spacing on the cable beam is 6 m. There is no separate abutment of the bridge. Both sides of the beam are erected on the building structures. The arch ribs of the bridge are steel arches, and the beam body is a steel box beam. The combination of beams and arches is used. The substructure is a pile foundation of base slab. The design BIM technology is used to assist the forward design, and ensure the rationality of structural design. MIDAS Civil is used for structural performance analysis. The settlement shows that the mechanical performance of the bridge meets the requirements of the specifications. The overall construction scheme of first beam and then arch is adopted for this bridge.

Key words:steel arch; half-through; beam arch combination; BIM aided design