Experimental study on repair of steel plate with different damage degrees subject to fatigue loading

Q. Q. Yu, X. L. Zhao, R. Al-Mahaidi, Z. G. Xiao, T. Chen, X. L. Gu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Recent research on the use of carbon fibre reinforced polymer (CFRP) materials in steel structures has demonstrated their potential for fatigue crack repair and corresponding convenience in construction. However, most previous tests focused on the specimen with a small notch or slot. There is limited study on the improved fatigue behavior of steel plates with different initial degrees of damage. This paper presents an experimental program on notched steel plates with different initial crack lengths repaired with CFRP laminates. Particular attention was paid to simulate the various initial degrees of damage using multiple lengths of slots, including 2%, 10%, 20%, 30% and 40% of the plate width. CFRP reinforcement with different elastic moduli and different configurations were adopted. The fatigue crack propagation was monitored by the "beach marking" technique and crack propagation gauges. The test results indicated that this retrofitting method was applicable to specimens at all stages of crack propagation to retard the crack propagation and prolong the fatigue life. Increasing the elastic modulus of CFRP laminate and covering the initial cracks could lead to more significant strengthening effects.

Original languageEnglish
Title of host publicationBridge Maintenance, Safety, Management and Life Extension - Proceedings of the 7th International Conference of Bridge Maintenance, Safety and Management, IABMAS 2014
PublisherTaylor and Francis - Balkema
Pages879-884
Number of pages6
ISBN (Print)9781138001039
Publication statusPublished - 2014
Externally publishedYes
Event7th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2014 - Shanghai, China
Duration: 7 Jul 201411 Jul 2014

Publication series

NameBridge Maintenance, Safety, Management and Life Extension - Proceedings of the 7th International Conference of Bridge Maintenance, Safety and Management, IABMAS 2014

Conference

Conference7th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2014
Country/TerritoryChina
CityShanghai
Period7/07/1411/07/14

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality

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