Effect of FRP strengthening of concrete structures on its blast load carrying-capacities

Hong Hao, Azrul A Mutalib

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Intensive research efforts have been spent on investigating the effectiveness of using FRP strengthening to increase the blast load-carrying capacities of RC structures. Most of these studies are experimental-based. It is found that in general FRP strengthening increases blast load-carrying capacities of RC columns and panels. However, some testing results indicate that FRP strengthening has only insignificant effect on structural capacities owing to premature debonding failure of FRP sheets. There is no systematic study yet to quantify the effectiveness of various FRP strengthening measures on blast load-carrying capacities of RC structures. This paper summarizes some of our recent works on studying and quantifying the effectiveness of FRP strengthening on blast load-carrying capacities of RC columns and slabs. Numerical models are developed to calculate the response and damage of RC columns and panels to blast loads. The reliability of the numerical models is verified by simulating the laboratory impact tests and field blast tests and comparing the numerical simulation results and testing data. The verified numerical models are then used to conduct intensive simulations of RC columns and slabs of different dimensions and material properties and strengthened with FRPs. The results are used to develop P-I diagrams of RC columns and slabs with or without FRP strengthening to quantify the effectiveness of FRP strengthening measures on the RC structure blast load-carrying capacities. Based on the numerical results, empirical relations are derived for quick development of P-I curves of RC columns and panels. These P-I curves are very useful in quantifying the blast load-carrying capacities of RC structures with various FRP strengthening measures. The failure modes of RC structures with FRP strengthening under different blast loading conditions are discussed.

Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Shock and Impact Loads on Structures
Pages23-38
Number of pages16
Publication statusPublished - 2011
Externally publishedYes
Event9th International Conference on Shock and Impact Loads on Structures - Fukuoka
Duration: 16 Nov 201118 Nov 2011

Other

Other9th International Conference on Shock and Impact Loads on Structures
CityFukuoka
Period16/11/1118/11/11

Fingerprint

Load limits
Concrete construction
Numerical models
Debonding
Testing
Failure modes
Materials properties
Computer simulation

Keywords

  • Blast loads
  • FRP
  • P-I curves
  • RC structures
  • Strengthening

ASJC Scopus subject areas

  • Civil and Structural Engineering

Cite this

Hao, H., & A Mutalib, A. (2011). Effect of FRP strengthening of concrete structures on its blast load carrying-capacities. In Proceedings of the 9th International Conference on Shock and Impact Loads on Structures (pp. 23-38)

Effect of FRP strengthening of concrete structures on its blast load carrying-capacities. / Hao, Hong; A Mutalib, Azrul.

Proceedings of the 9th International Conference on Shock and Impact Loads on Structures. 2011. p. 23-38.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hao, H & A Mutalib, A 2011, Effect of FRP strengthening of concrete structures on its blast load carrying-capacities. in Proceedings of the 9th International Conference on Shock and Impact Loads on Structures. pp. 23-38, 9th International Conference on Shock and Impact Loads on Structures, Fukuoka, 16/11/11.
Hao H, A Mutalib A. Effect of FRP strengthening of concrete structures on its blast load carrying-capacities. In Proceedings of the 9th International Conference on Shock and Impact Loads on Structures. 2011. p. 23-38
Hao, Hong ; A Mutalib, Azrul. / Effect of FRP strengthening of concrete structures on its blast load carrying-capacities. Proceedings of the 9th International Conference on Shock and Impact Loads on Structures. 2011. pp. 23-38
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