多跨高墩组合连续刚构桥静力性能及稳定性研究  

Static Performance and Stability of a Multi-Span Hybrid Continuous Rigid Frame Bridge with High Piers

作　　者：黄宇 刘冠宇 易建波 邢轩 粟淼 彭晖 HUANG Yu;LIU Guanyu;YI Jianbo;XING Xuan;SU Miao;PENG Hui(School of Civil Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China;China First Highway Engineering Co.,Ltd.,Lishui,Zhejiang 323000,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]中交一公局集团有限公司,浙江丽水323000

出　　处：《中外公路》2025年第1期166-173,共8页Journal of China & Foreign Highway

基　　金：国家自然科学基金资助项目(编号:52178186)。

摘　　要：为了研究浙江遂昌某钢-混组合连续刚构桥的静力性能与稳定性,该文利用Midas Civil建立全桥单梁及梁格有限元模型,采用Ansys建立局部实体有限元模型,对使用阶段不同荷载作用下结构位移与应力状态和墩梁固结段的局部应力进行详细分析,讨论桩底约束刚度与墩梁连接形式对桥梁整体稳定性的影响,研究风荷载和活载作用下结构整体稳定性。结果表明:梁格模型能够较好地模拟出桥梁的真实受力状态。在活载作用下,桥梁整体受力性能及桥梁结构的整体稳定性均能满足规范要求,结构最大挠度为23.8 mm,主梁最大拉应力为45.5 MPa,出现在第一跨跨中位置,最大压应力为-46.5 MPa,出现在6^(#)桥墩位置;使用阶段荷载组合作用下,结构最大挠度为106.7 mm,主梁最大拉应力为160 MPa,最大压应力为-205 MPa。增大墩底的约束刚度有利于提高桥梁的整体稳定性,而墩梁固结相比于支座连接更有利于桥梁稳定性。In order to study the static performance and stability of a steel-concrete composite continuous rigid frame bridge in Suichang,Zhejiang Province,a single girder and girder lattice finite element model for the whole bridge was established by using Midas Civil,and a local solid finite element model was established by using Ansys.A detailed analysis of the structural displacement and stress state of the bridge in use and the local stress in the solid section of the pier and girder under different loads was carried out.The influence of the pile-bottom restraint stiffness and pier-girder connection form on the overall stability of the bridge was discussed,and the overall stability of the structure under wind and live loads was investigated.The results show that the girder lattice model can better simulate the real stress state of the bridge.Under the action of live load,the overall mechanical performance of the bridge and the overall stability of the bridge structure can meet the requirements of the code.The maximum deflection of the structure is 23.8 mm;the maximum tensile stress of the main girder is 45.5 MPa at the middle of the first span,and the maximum compressive stress is-46.5 MPa at the sixth pier.Under the combined action of loads in the use stage,the maximum deflection of the structure is 106.7 mm;the maximum tensile stress of the main girder is 160 MPa,and the maximum compressive stress is-205 MPa.Increasing the pile-bottom restraint stiffness is conducive to improving the overall stability of the bridge,and pier-girder consolidation is more conducive to bridge stability than bearing connections.

关 键 词：连续刚构 钢混组合梁桥 静力分析 稳定性 有限元分析 

分 类 号：U443[建筑科学—桥梁与隧道工程]