公路混凝土梁式桥全寿命设计方法及应用分析

目前国内外虽然进行了大量针对桥梁生命周期的专项研究，但关于桥梁全寿命设计体系、各设计过程及相应方法的研究依然匮乏。现阐明了全寿命设计方法的概念、设计原则和设计目标，将桥梁的设计和需求拓展到结构的整个使用寿命期，建立了公路混凝土梁式桥全寿命设计方法的总体框架。同时以一座钢筋混凝土简支梁桥作为背景工程，从桥梁时变可靠性和周期成本优化两个方面入手，将所研究的全寿命设计框架和设计方法进行了具体阐述，并应用于实际混凝土梁式桥项目中，为工程实践提供一定的参考借鉴和设计思路。

Analysis of Highway Concrete Beam Bridge Life Cycle Design Method and Application

Although a great deal of special research on the bridge life cycle has been done at home and abroad, the life cycle design system and the corresponding design methods for bridge are still scarce. The concept of life cycle design methods, design principles and design objectives are clarified. The design of the bridge and needs are expanded to the entire life of the structure. The overall framework of the life cycle design of the highway concrete beam bridge is created in this paper. An example is studied based on simply supported reinforced concrete beam bridge engineering. A life cycle design framework and design method for the life cycle design system of bridge are specifically addressed, according to the two methods including the time-variant reliability and cycle cost optimization for the bridge. The theory is applied to actual concrete beam bridge project for engineering practice to provide references and design ideas.