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Concepts of developing traffic load model for multi-span cable supported bridges

机译:开发多跨度斜拉桥的交通负荷模型的概念

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摘要

Traffic load effects of multi-span cable supported bridges are significantly different from those of small and medium span bridges. However the current traffic load codes are generally specified for small and medium span bridges, which are extremely conservative for the design of multi-span cable supported bridges. A profound and comprehensive review on existing research of traffic load models for large span bridges is presented, providing theoretical foundation for the concepts of performance based traffic load models. Different structure performance levels, design states and parameters are discussed under varied traffic load service levels. Novel techniques in related traffic load research field are introduced to explore the possible performance based design methodology and process. Application of the traffic load effect analysis is stated by two practical examples. According to the results, it is indicated that concepts of performance based design are more accurate and efficient for the traffic load effect, and provides the structure optimization with favorable conditions.
机译:多跨度电缆支撑桥梁的交通荷载影响与中小跨度桥梁的交通荷载影响显着不同。但是,当前的交通负荷代码通常是为中小型跨度桥梁规定的,对于多跨度电缆支撑桥梁的设计来说,这是非常保守的。提出了对大跨度桥梁交通荷载模型现有研究的深刻而全面的综述,为基于性能的交通荷载模型的概念提供了理论基础。在不同的交通负荷服务水平下讨论了不同的结构性能水平,设计状态和参数。介绍了相关交通负荷研究领域中的新技术,以探索可能的基于性能的设计方法和过程。通过两个实例说明了交通负荷效应分析的应用。根据结果​​表明,基于性能的设计概念对于交通负荷效应更为准确和有效,并为结构优化提供了有利条件。

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