加固后箱梁病害持续发展原因分析

Analysis of Sustained Development of Damage in Reinforced Box Beam

某预应力混凝土连续刚构桥在加固维修后仍出现跨中下挠、裂缝发展、动挠度过大等病害,通过现场调查及模拟计算,结合本桥结构受力特点及加固施工情况,对病害继续发展的原因进行分析,为采取新的维修加固措施提供科学依据。

There are some disease appears in prestressed concrete continuous rigid frame bridge,such as middle deflection,crack development and excessive dynamic deflection after strengthening.Combined with the characteristics of the bridge structure and strengthening construction of the specific circumstances,the cause of continuous developing of the disease is analyzed through field investigation,simulation calculation and analysis,which can provide scientific basis for the new maintenance measures.