公路混凝土桥梁的周期性预防养护研究

Research on Periodic Preventive Maintenance of Highway Concrete Bridges

为探讨公路混凝土桥梁养护的有效方法,采用桥梁技术非线性退化模型及交通模拟软件,评定交通超载对桥梁结构性能退化的影响,明确公路混凝土桥梁墩身磨损病害特征及其退化周期,依据桥梁技术状况的退化预测数据,计算桥梁的间隔养护周期,进而确定桥梁的周期性预防养护策略。实证分析显示,周期性预防养护可延长桥梁使用寿命,降低周期性预防养护成本低,延缓桥梁路面劣化速率,且经济及社会效益优势突出。

In order to explore the effective method of highway concrete bridge maintenance,the nonlinear degradation model of bridge technology and traffic simulation software are used to evaluate the influence of traffic overload on the performance degradation of bridge structure,and to clarify the characteristics of pier wear and degradation cycle of highway concrete bridge.According to the degradation prediction data of bridge technology,the interval maintenance cycle of bridge is calculated,and then the periodic preventive maintenance strategy of bridge is determined.Empirical analysis shows that periodic preventive maintenance can prolong the service life of bridges,reduce the cost of periodic preventive maintenance,delay the deterioration rate of bridge pavement,and have outstanding advantages in economic and social benefits.