Damage Investigation, Strengthening, and Repair of Jilin Highway Double-Curved Arch Concrete Bridge in China

Jilin highway concrete bridge is located in the center of Jilin City, which is positioned in the middle and southern part in Jilin province in east north of China. This bridge crosses the Songhua River. The strengthening of concrete bridge structure involves upgrading of the strength and stiffness of structural members, and the repair process involves reestablishing the strength and function of the damaged members. The main objectives of this study are to identify the damaged members of Jilin highway concrete bridge structure and to explain the application of strengthening and repair methods to improve the performance of the bridge structural members. The results of damages investigation of a bridge structure appearance show that the most components of the bridge are in good conditions with the exception arch waves, spandrel arch, deck pavement of the new arch bridge, and corbel of the old simply supported beam bridge which suffer from serious damages. In this study, jacketing method, grouting repair method, patching method, and replacement of expansion joint and drainage system had been used to strengthen and repair the damaged members of Jilin highway concrete bridge. After completing the strengthening and repair processes, the state of arch waves, spandrel arch, and deck pavement is good, but there is need to evaluate the performance of structural members which are strengthened and repaired by adopting static and dynamic load tests, and monitoring the development of cracks.