Development of P-I diagrams for FRP strengthened RC columns

Azrul A Mutalib, Hong Hao

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

In this study, numerical simulations are performed to construct the Pressure-Impulse (P-I) diagrams for FRP strengthened RC columns to provide correlations between the damage levels of FRP strengthened RC columns and blast loadings. Numerical model of RC columns without or with FRP strengthening is developed using LS-DYNA. The accuracy of the model to simulate RC column responses to blast loads is verified by comparing the numerical simulation results with the tests results available in the literature. Dynamic response and damage of RC columns with different FRP strengthening measures are then calculated using the developed numerical model. The residual axial-load carrying capacity is utilized to quantify the damage level since the columns are primarily designed to carry the axial loads. Parametric studies are performed to examine the influence of column dimension, concrete strength, steel reinforcement ratios, FRP thickness and FRP strength on the P-I diagrams. The empirical formulae are derived based on numerical results to predict the impulse and pressure asymptote of P-I diagrams. These empirical formulae can be straightforwardly used to construct P-I diagrams for assessment of blast loading resistance capacities of RC columns with different FRP strengthening measures.

Original languageEnglish
Pages (from-to)290-304
Number of pages15
JournalInternational Journal of Impact Engineering
Volume38
Issue number5
DOIs
Publication statusPublished - May 2011
Externally publishedYes

Fingerprint

Axial loads
Numerical models
Computer simulation
Load limits
Dynamic response
Reinforcement
Concretes
Steel

Keywords

  • Empirical formulae
  • FRP strengthened RC columns
  • P-I curves
  • Unstrengthened RC columns

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Ocean Engineering
  • Automotive Engineering
  • Aerospace Engineering
  • Civil and Structural Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Development of P-I diagrams for FRP strengthened RC columns. / A Mutalib, Azrul; Hao, Hong.

In: International Journal of Impact Engineering, Vol. 38, No. 5, 05.2011, p. 290-304.

Research output: Contribution to journalArticle

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