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混凝土梁式桥在环境、车辆荷载作用下引起各种不同损伤,材料损伤为材料性能劣化,构件损伤为构件开裂或截面损伤,结构损伤为连接构件或重要边界条件发生开裂失效等。调研我国公路混凝土梁式桥损伤现状,分析各种材料损伤存在的区域特点及成因,总结空心板梁桥、整体现浇板桥、T型梁桥、预应力混凝土连续桥和连续刚构桥的典型结构和构件损伤,并剖析其原因。调研分析结论为桥梁养护和科学研究提供参考。
Concrete beam bridges cause various damage under the environment and vehicle load. Material damage is material deterioration, component damage is cracking or cross-section damage, and structural damage is failure of connection components or critical boundary conditions. The current situation of the damage of highway concrete beam bridges in China is investigated. The regional characteristics and causes of damage of various materials are analyzed. The typical structures of hollow girder bridges, integral cast-in-place bridge, T-beam bridge, prestressed concrete continuous bridge and continuous rigid frame bridge are summarized And component damage, and analyze the reason. The conclusions of research and analysis provide reference for bridge maintenance and scientific research.