基于ABAQUS的钢筋混凝土T构转体结构有限元分析

针对某在建横跨铁路特大桥与铁路左右线相交，为了减少对既有铁路线运营的影响，采用在平行既有铁路线一侧挂篮浇筑2~64 m混凝土T构，再以主墩为中心将箱梁转动到桥位的转体施工方法。通过ABAQUS有限元分析软件对T构转体结构进行了全过程数值模拟，分析了转体施工过程中结构关键部位的应力分布，并与施工现场的实时监测数据进行了对比。结果表明:T构转体结构整体处于较低的应力状态，局部存在应力集中现象，可通过加强局部构造的方法保证转体结构的力学性能满足施工要求，从而保证转体施工的安全可靠。

Finite Element Analysis of Reinforced Concrete T-shape Rotary Structure Based on ABAQUS

Aimed at a railway bridge under construction going across the existing railway line, in order to reduce the impact on the operation of the existing railway lines, the rotation construction method of hanging basket and pouring 2-64 m T-shape concrete at one side of the existing railway lines, and rotating the box girder to the design location around the main pier at the other side of the existing railway line was used. Numerical simulation was conducted using ABAQUS on the stress distribution of the T-shape rotary structure, and the results by finite element analysis were compared with real-time monitoring data on site. The results show that the T-shape rotary structure is generally at a low stress state, but the stress concentration is also found elsewhere. It is recommended to facilitate the T-shape rotary structure to meet the construction requirements by local reinforcement to ensure the safety and reliability of the rotation construction.