空心板梁桥结构预防性养护的时机选择研究

根据预应力混凝土、普通钢筋混凝土空心板梁桥各主要病害时变进程的统计曲线,同时考虑重车/轻车路段、重交通/轻交通路段和高等级/低等级路段上桥梁差别化的因素,提出了空心板梁桥结构预防性养护中结构总体技术状况应控制为不低于于3类(C级),结构预防性养护的初次开展时间应控制在桥梁状况评价分数(BCI)为80分,即结构尚处在2类(B级)、即将退化为3类(C级)之时的建议。

Study on Selection of Preventive Maintenance Timing of Hollow Slab Girder Bridge Structure

Based on the statistical curve of time varying progress of each main disease of pre-stressed concrete and ordinary reinforced concrete hollow slab girder bridges,and also considering the factors of bridge differentiation on the heavy/light vehicle road section,heavy/light traffic road section and high grade/low grade road section,the overall technical condition of hollow slab girder bridge structure in preventive maintenance should be controlled no less than Class 3(Class C),and the initial time of preventive maintenance of structure should be controlled at the bridge condition index(BCI)of 80 minutes when thestructure is still in Class 2(Class B)bridge,is about to degrade into Class 3(Class C).