单肋拱加劲V型撑刚构连续梁桥性能分析  

Performance analysis of V-shaped rigid structure continuous beam bridge with single-rib arch strengthening

作　　者：黄润 HUANG Run(Fujian Provincial Communications Planning and Design Institute Co.,Ltd.,Fuzhou 350004,China)

机构地区：[1]福建省交通规划设计院有限公司,福建福州350004

出　　处：《福建理工大学学报》2024年第6期520-526,共7页JOURNAL OF FUJILAN UNIVERSITY OF TECHNOLOGY

摘　　要：为美化桥型,提高连续梁桥的跨越能力,有效解决关键部位应力集中产生裂缝等工程问题,以福州市湾边特大桥为例,提出了单肋拱加劲V型撑刚构连续梁桥结构。分析结果表明:该结构通过调整拱肋刚度、优化结构设计,研发相应的施工工艺,有效控制了裂缝发生及发展;整体受力方面,拱肋分担了二期恒载34.4%和活载23.5%弯矩,确实起到良好的加劲作用;吊点处拱肋加劲构造出现局部应力集中区,通过加强钢板厚度有效解决;横梁与箱梁翼缘板刚度差异大,拉应力较为集中,采取横梁与箱梁翼缘板间增设倒角满足力学指标。经过多年的运营监测证明了单肋拱加劲V型撑刚构连续梁桥结构合理性和可实施性,可为同类桥梁设计与施工提供技术指导。This research aims to beautify the bridge type,improve the spanning capacity of the continuous beam bridge,and effectively solve the engineering problems such as cracks caused by stress concentration in key parts.Taking Fuzhou Bay Bridge as an example,the single-rib arch reinforced V-shaped rigid structure continuous beam bridge structure is put forward.Analysis results show that the structure effectively controls the occurrence and development of cracks by adjusting the stiffness of the arch rib,optimizing the structure design and developing the corresponding construction technology;in terms of overall force,the arch rib shares 34.4%of Phase II constant load and 23.5%of bending moment in live load,which has a good strengthening effect;the local stress concentration area appears at the lifting point,which is effectively solved by strengthening the thickness of the steel plate;the stiffness difference between the flange plate of the cross beam and the box girder is large,and the tensile stress is relatively concentrated,so the chamfer between the beam and the box girder is adopted to meet the mechanical index.Years of operation monitoring has proved the rationality and feasibility of the single-rib arch reinforced V-shaped rigid structure continuous beam bridge,which can provide technical guidance for the design and construction of similar bridges.

关 键 词：单肋拱加劲V型撑刚构连续梁 梁拱组合结构 全桥空间网格三维仿真 实用精细化分析 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]