基于有限元分析的大跨度桥梁结构仿真模拟与验证  

Simulation and Verification of Long-span Bridge Structure Based on Finite Element Analysis

作　　者：孔令常 KONG Ling-chang(China Highway Engineering Consultants Corporation,Beijing 100089,China)

机构地区：[1]中国公路工程咨询集团有限公司,北京100089

出　　处：《筑路机械与施工机械化》2020年第8期61-65,共5页Road Machinery & Construction Mechanization

基　　金：国家自然科学基金(5172302153)。

摘　　要：为研究大跨度桥梁结构在施工过程中对桥梁跨中挠度、临近5 m处轨道沉降、桥墩沉降和跨中连接处螺栓应力的影响,采用Midas有限元方法进行建模计算,并与实测数据进行对比,验证模型的可靠度,其最大误差为11.2%。结合该模型计算施工过程中的变形及应力,得出:跨中挠度变形增长速率先逐渐增大,后逐渐减小;在第10天时,跨中挠度为1.56 mm,周边轨道沉降为0.62 mm,桥墩沉降为0.24 mm,螺栓应力为653.48 MPa。结合模拟结果,对不同情况进行分析,并提出解决方案,为今后绿色安全施工提供指导方法。In order to study the influence of long-span bridge structure on the disturbance degree in the middle of bridge span,the settlement of track at a distance of 5 m,the settlement of bridge pier and the bolt stress in the middle of bridge span connection,Midas finite element method was used to model and calculate.The calculated result was compared with the measured data to verify the reliability of the model,and the maximum error is 11.2%.Combined with the model,the deformation and stress in the construction process were calculated,and the results show that the deformation growth rate of mid-span interference increases first and then decreases gradually;in the 10th day,the mid-span interference is 1.56 mm,the surrounding track settlement is 0.62 mm,the pier settlement is 0.24 mm,the bolt stress is 653.48 MPa.Combining with the simulation results,the different situations were analyzed,and the solutions were proposed to provide guidance for the future green and safe construction.

关 键 词：大跨度桥梁 结构仿真 有限元分析 施工 

分 类 号：U446.2[建筑科学—桥梁与隧道工程]