|Table of Contents|

Research progress of fiber reinforced polymer in strengthening concrete bridge structure(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年01期
Page:
31-51
Research Field:
综述
Publishing date:

Info

Title:
Research progress of fiber reinforced polymer in strengthening concrete bridge structure
Author(s):
MEI Kuihua1;  WANG Fengxuan1; 2;  SUN Shengjiang1
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Shandong Provincial Communications Planning and Design Institute Group Co., Ltd., Jinan 250101, Shandong, China)
Keywords:
bridge engineering;  FRP reinforcement;  concrete structure;  reinforcement method;  design theory;  review
PACS:
U445.7
DOI:
10.19815/j.jace.2022.09044
Abstract:
In order to summarize the research results of fiber reinforced polymer(FRP)in concrete bridge reinforcement, broaden the ideas of FRP strengthening bridges in China and promote its wide application in the field of concrete bridge reinforcement, the development and characteristics of FRP reinforcement methods were explained. The research progress of FRP reinforcement methods in concrete bridges was systematically combed. According to the different reinforcement mechanisms, flexural reinforcement, shear reinforcement and compressive reinforcement were summarized. Several common FRP strengthening methods, influencing factors, failure modes and their design theories were introduced. The key problems of impact resistance, fire resistance, time-varying performance and durability in FRP reinforcement were discussed in detail. The shortcomings of the existing studies were analyzed, some problems and ideas that can be further studied were put forward. The results show that the externally bonded FRP method, prestressed FRP technology, surface embedded method, FRP grid reinforcement and other technologies have been studied more, which show different failure modes under different design parameters and service conditions. Externally bonded FRP sheets are prone to premature peeling failure. Some anchoring measures can be taken to improve the interfacial adhesion, among which HB-FRP reinforcement technology has the best anchoring effect. The prestressed FRP reinforcement technology has a good application prospect because of its high material strength utilization rate. In the follow-up, the design theory of FRP reinforcement should be deeply studied, and the influence of various parameters on the performance of the reinforced structure should be comprehensively considered to establish a unified, reliable and practical design and calculation model. Further study should be done on the long-term performance and durability of the existing reinforced concrete structure under the multi factor coupling action, and the design method and specification of FRP reinforced concrete bridges should be improved.

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Last Update: 2024-01-25