轻型钢-混凝土过渡段构造设计与有限元分析

Structural Design and Finite Element Analysis of Lightweight Steel-Concrete Transition Section

摘要:

为了增大中跨跨径，同时控制造价，很多桥梁都采用了混合梁作为主梁，即主跨采用钢梁，边跨为混凝土梁。这就导致两种材料相连处必然存在钢-混凝土过渡段。在保证传力可靠的前提下尽量简化过渡段的构造和重量是追求的目标。结合某混合梁悬索桥工程，设计了一种轻型钢-混凝土过渡段构造，较传统过渡段重量轻、结构简单、便于施工。采用有限元对钢-混凝土过渡段进行三维非线性分析，验证了其传力的可靠性，可为其他类似的工程提供设计参考。

Abstract:

In order to increase the mid-span span and control the costs, the composite beams are used as the girders for many bridges, that is, the main span is the steel girder and the side span is the concrete beam, which leads to the inevitable existence of a steel-concrete transition section at the junction of the two materials. The goal is to simplify the structure and weight of the transition section as much as possible under the premise of ensuring the reliable force transmission. Combined with a composite beam suspension bridge project, a lightweight steel-concrete transition section structure is designed, which is lighter in weight, simpler in structure and easier to construct than the traditional transition section. The three-dimensional nonlinear analysis of the steel-concrete transition section is carried out using finite element method to verify the reliability of its force transmission, which can provide design reference for other similar projects.