基于可靠性原理的在役钢筋混凝土桥梁碳化寿命预测

摘要

友爱立交桥是南宁市快速环道重要的交通枢纽,对其进行耐久性评估和寿命预测对于桥梁的正常运营具有重要的意义.对桥梁进行了外观检测、混凝土回弹检测、混凝土保护层厚度检测、混凝土碳化深度检测,以及混凝土氯离子含量检测,并对检测结果进行统计与分析.基于桥梁服役的大气环境参数及检测数据,分析并计算了桥梁主要受力构件的碳化可靠指标及剩余碳化寿命,为评定桥梁的服役年限及加固维修提供了参考依据.%The Youai grade separation bridge is a transportation hub of nanning fast ring road, and the durability evaluation and life prediction of the bridge is extremely significant for ensuring the normal operation of the bridge. The youai grade separation bridge on the appearance test, concrete rebound detection, concrete cover depth detection, concrete carbonation depth detection, concrete chlorine ion content detection,and the detection results in statistics and analysis. Based on the bridge of the service the atmospheric environment parameters and testing data,the paper calculates and analyzes the main stress components the carbonation bridge reliability index and remaining life of carbide, assessing the bridge for the service life and reinforcement maintenance and offer the scientific basis.