Numerical analysis of FRP-composite-strengthened RC panels with anchorages against blast loads

Azrul A Mutalib, Hong Hao

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Extensive research has been conducted to investigate the blast effects on building structures and the protective design methods using the fiber-reinforced polymer (FRP) strengthening concepts in resisting structural damage and preventing injuries against dynamic explosive impacts. Both numerical and experimental studies have proved the effectiveness of FRP in strengthening structures to resist blast loads. However, problems related to end anchorage, bond length, and premature peeling have been concerns when strengthening structures in flexure or shear using FRP. In this paper, numerical analyses of FRP-composite-strengthened RC walls with or without additional anchors are carried out to examine the structural response under blast loads. The results illustrated that an anchor system is often necessary when using external FRP laminates for strengthening RC walls to prevent premature peeling. This study presents three simulations of RC walls, namely, an unstrengthened RC wall, an FRP-composite-strengthened RC wall with end anchorage, and an FRP-composite-strengthened RC wall with both end anchorage and anchors applied at a minimum spacing across the width and height of the RC wall. Commercial software LS-DYNA is used to carry out the structural response analysis. Numerical results show that anchorage of the FRP sheet may prevent peeling damage and therefore enhances the capacity of the FRP-strengthened RC walls against blast loads. However, anchors result in stress concentration and may cause FRP rupture.

Original languageEnglish
Pages (from-to)360-372
Number of pages13
JournalJournal of Performance of Constructed Facilities
Volume25
Issue number5
DOIs
Publication statusPublished - Sep 2011
Externally publishedYes

Fingerprint

Numerical analysis
Fibers
Composite materials
Polymers
Anchors
Peeling
Bond length
Laminates
Stress concentration
Loads (forces)

Keywords

  • Anchorage
  • Blast loads
  • FRP
  • RC wall
  • Strengthening

ASJC Scopus subject areas

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

Cite this

Numerical analysis of FRP-composite-strengthened RC panels with anchorages against blast loads. / A Mutalib, Azrul; Hao, Hong.

In: Journal of Performance of Constructed Facilities, Vol. 25, No. 5, 09.2011, p. 360-372.

Research output: Contribution to journalArticle

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