PC连续刚构桥运营过程中承载力影响因素研究

Study of Influencing Factors on Bearing Capacity of PC Continuous Rigid Frame Bridge in Operation Process

对PC连续刚构桥的主要病害进行归纳总结,以一座主跨98m的三跨PC连续刚构桥为工程实例,采用有限元分析的方法对PC连续刚构桥承载力影响因素进行研究,得出各个承载力影响因素对PC连续刚构桥的影响。结果表明,纵向预应力损失、跨中下挠和温度对PC连续刚构桥的承载力有着重要的影响,在PC连续刚构桥运营过程中加强对预应力损失和跨中下挠的监测,对同类桥梁的检测和加固有一定借鉴意义。

Main diseases of PC continuous rigid frame bridge are summarized.Taking a three-span PC continuous rigid frame bridge with a main span 98 m as an engineering example,the influence factors on bearing capacity of PC continuous rigid frame bridge is studied by the finite element analysis method,and various influence factors on bearing capacity of continuous rigid frame bridge are achieved.The results show that the longitudinal prestressing loss,the deflection in the middle of span and the temperature have a significant influence on the bearing capacity of PC continuous rigid frame bridge.It is required to strengthen the monitor of the prestressing loss and the deflection in the middle of span,which can be referred for the inspection and reinforcement of the similar bridges.