Evaluation of technical and economic effectiveness of Fiber Reinforced Polymer (FRP) solutions in repair/strengthening of steel bridges in Vietnam

• Main Author: Nguyễn, Hữu Hòe
• Other Authors: Luong, Xuan Binh
• Format: Theses
• Language: English
• Published: 2020
• Subjects: Cơ sở hạ tầng; Cầu thép; Vật liệu; Xây dựng; 624.18
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/70347
• Institution: Vietnam National University, Hanoi

Through the experience results, the thesis has useful comments on the quality of the processing of steel structure surface to the adhesion effect between epoxy glue and reinforced structure. This is an important basis to build instructions on construction technology steps to apply FRP materials on steel structures. Experimental research has also evaluated the effect of reinforcing the bearing capacity of FRP materials for steel structures. Through a survey of the deterioration and degradation of Long Bien Bridge, the thesis has proposed a solution to apply FRP materials to repair, reinforce collar beams within the range of train operation of Long Bien bridge. Find out someadvantages and disadvantages of using the FRP material method and other traditional methods have been used. The thesis has proposed a set of criteria to select FRP materials suitable for repairing and strengthening requirements of steel structures in Long Bien Bridgeproject in particular and steel bridges in Vietnam in general. Research proposed a method of calculation to determine the number of layers of FRP material to reinforcebending capacity for the collar beam’s section of Long Bien Bridge (corresponding to the level of damages 20%, 10%, and 5%). Based on norms, documents, announcements of Vietnam, research has estimated the unit price for three methods of reinforcement, repair for a horizontal/collar beam (replacing collar beams, gluing steel plates and using FRP material). Thereby, comparing the effectiveness of the method of using FRP with the other methods. Through the calculation of unit prices and comparative analysis, research point out the economic efficiency of the solution using FRP materials, especially if considering the more effective aspects, and other advantages of FRP such as: do not have to stop operation, protecting human health and protect the environment.