HE Shuan-hai, ZHAO Xiang-mo, MA Jian, ZHAO Yu, SONG Huan-sheng, SONG Hong-xun, CHENG Lei, YUAN Zhuo-ya, HUANG Fu-wei, ZHANG Jian, TIAN Bin, WANG Lu-yang, QI Xiu-zhen
China Journal of Highway and Transport. 2017, 30(11): 63-80.
In order to improve the technology of highway bridge inspection and evaluation in China, the current situations and trends of structure inspection and condition assessment of bridges were summarized. Damage of the appearance of the bridge, internal defects, principles of inspection of geometry and mechanical characteristics, content and methods of inspection were analyzed in detail. Meanwhile, current situations of the comprehensive inspection technology of prestressed force for PC bridges were commented. Meanwhile, the methods for safety evaluation of in-service RC bridges and PC bridges were summarized, with a summary of the latest research results of the evaluation of fatigue life capability for steel bridge. The comprehensive analyses show that, the intelligent nondestructive testing is the development trend of bridge inspection technology. The intelligent inspection technologies, such as image recognition and sonic CT technology, are widely applied to the inspection of damage of the bridge appearance and internal defects. Comprehensive prestressed inspection technology characterized by prestressed positioning, corrosion, grouting compactness and the tension of prestressed tendon provides a significant method to evaluate the bearing capacity of in-service prestressed concrete. As for the evaluation technology of concrete bridge, the concrete bridge damage evaluation method featured by crack properties, and prestressed condition extends the possibility of quantitative evaluations for the safety of in-service damaged concrete bridge. Finally, in the evaluation of the fatigue life capability of the steel bridge, the nominal stress method based on S-N curve of structural fatigue detail is the major method for evaluation. Whereas, the fracture mechanics method featured on the modern crack detection technology is promising in the evaluation of the fatigue life capability of the steel bridge.