精品文档---下载后可任意编辑中小跨径混凝土桥梁疲劳荷载模型及疲劳性能讨论中期报告摘要：中小跨径混凝土桥梁是公路交通中常见的桥梁类型，其疲劳性能对桥梁的安全运行至关重要。本文基于现代结构力学和桥梁工程学理论，建立了中小跨径混凝土桥梁疲劳荷载模型，并对其疲劳性能进行了讨论。通过对比不同荷载模型下的桥梁疲劳寿命，发现采纳 Wöhler 曲线法模型能更准确地预测桥梁的疲劳寿命。同时，讨论了不同干/湿循环次数对其疲劳性能的影响，并提出了相应的疲劳寿命修正系数。该讨论对于中小跨径混凝土桥梁的设计和监测具有重要意义。关键词：中小跨径混凝土桥梁，疲劳荷载模型，疲劳寿命，Wöhler曲线法，干/湿循环次数Abstract:Small and medium span concrete bridges are common types of bridges in highway transportation, and their fatigue performance is vital to the safe operation of bridges. Based on modern structural mechanics and bridge engineering theory, this paper establishes a fatigue load model for small and medium span concrete bridges and studies their fatigue performance. By comparing the fatigue life of bridges under different load models, it is found that using the Wöhler curve method model can more accurately predict the fatigue life of bridges. At the same time, the effect of different dry/wet cycle numbers on its fatigue performance was studied, and corresponding fatigue life correction coefficients were proposed. This study is of great significance for the design and monitoring of small and medium span concrete bridges.Keywords: small and medium span concrete bridges, fatigue load model, fatigue life, Wöhler curve method, dry/wet cycle number
