随着城乡建设的不断发展,城市桥梁和公路桥梁的负荷越来越重,造成混凝土结构桥梁的不同程度的损坏;在设计和施工过程中不注重细部结构的设计也是造成桥梁耐久性的一个很重要的因素,这些问题的存在严重影响了桥梁的使用寿命,因而从多方面对混凝土结构的耐久性设计的分析和研究是非常必要的.%With the continuous development of urban and town construction, urban bridge and highway bridge's load is heavier which resulted in the damage of concrete structure bridge at different levels. The carelessness at design and construction of structural features is also an important factor influencing bridge's durability. These problems seriously intluenco the service life of bridges, therefore, it is necessary to study the durabihty design of concrete structure bridge from many aspects.
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