浅谈大跨径连续刚构桥的健康监测

Discussion of Health Monitoring of Long-span Continuous Rigid Frame Bridges

近年广泛应用的大跨径连续刚构桥已出现不同程度的病害,该型桥的设计、施工、运营、养护等都较为复杂,定期检测在一定程度上保证了桥梁的安全,但一些结构损伤无法探测,运营过程中又容易受到设计施工偏差、交通量和超限车辆的增多、温度、收缩、蠕变等各类因素的影响,加剧病害导致巨大损失。为保证桥梁的功能性、耐久性、安全性,避免严重事故发生,对桥梁结构进行健康监测应运而生。

In recent years,long span continuous rigid frame bridges have occurred different degrees of diseases.The design,construction,operation and maintenance of the bridge are complicated,so to some extent the periodical test is very important for the safety of bridge.However,some structure diseases can't be detected and are easily influenced by deviation of construction,heavy traffic,temperature,shrink,creep deformation etc,in operating process which is aggravating the diseases.To ensure the ability,durability,safety of bridges and avoid the serious accident,the health monitoring of bridges are very necessary.