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Compressive behavior of concrete actively confined by metal strips, part B: Analysis

Moghaddam, H ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1617/s11527-010-9589-5
  3. Publisher: 2010
  4. Abstract:
  5. This paper presents analytical part of an investigation on the application of prestressed strips for concrete confinement. In this paper, an analytical model is proposed to predict the compressive stress-strain curve of strapped concrete as a function of the confinement level. The model was calibrated based on the experimental data of compressive tests which were described in part A of this paper. Various parameters are considered in the proposed model including volumetric ratio, yield strength and ultimate strain of confining material, shape of cross section, strength of plain concrete. Three key points were defined on the stress-stress curve of strapped concrete columns and applied in model definition including critical, yield and ultimate points. The model showed good capability in predicting the compressive stress-strain curve of tested strapped concrete specimens. The model is also compared to some of the conventional confinement models in prediction of the strength gained by post-tensioned strips. In addition, a plasticity model was applied in the nonlinear finite element analysis of prismatic and cylindrical tested specimens with various levels of confinement. It is shown that these models are able to predict the experimental results, reasonably
  6. Keywords:
  7. Concrete ; Active confinement ; Analytical model ; Compressive behavior ; Compressive tests ; Concrete column ; Concrete specimens ; Confinement model ; Cross section ; Experimental data ; Keypoints ; Metal strips ; Non-linear finite-element analysis ; Plain concrete ; Plasticity model ; Post tensioned ; Pre-stressed ; Ultimate strain ; Volumetric ratio ; Yield strength ; Columns (structural) ; Compressive stress ; Concrete construction ; Forecasting ; Mathematical models ; Nonlinear analysis ; Stress-strain curves ; Strip metal ; Tensile stress ; Finite element method
  8. Source: Materials and Structures/Materiaux et Constructions ; Volume 43, Issue 10 , 2010 , Pages 1383-1396 ; 13595997 (ISSN)
  9. URL: http://link.springer.com/article/10.1617%2Fs11527-010-9589-5