Increasing the flexural capacity of geopolymer concrete beams using partially deflection hardening cement-based layers: Numerical study
| Autor: | M. Mastali, M.. Mastali, Z. Abdollahnejad, A. Dalvand |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Cement Ultimate load Materials science Computer program business.industry Constitutive equation General Engineering 02 engineering and technology Structural engineering 021001 nanoscience & nanotechnology 01 natural sciences Finite element method Flexural strength Deflection (engineering) 0103 physical sciences Hardening (metallurgy) 0210 nano-technology business |
| Zdroj: | Scientia Iranica. |
| ISSN: | 2345-3605 |
| Popis: | Experimental research has demonstrated the great flexural performance of deflection hardening cement based composites for strengthening the beams. This paper numerically investigates the feasibility of adding thin deflection hardening fiber reinforced layers to the bottom of geopolymer concrete beams to enhance the flexural performance. To properly predict the structural behavior and crack patterns of beams, the smeared crack approach was adopted to simulate the beams. The numerical simulations executed in the FEM-based computer program. To validate the developed numerical models, the tested experimental tests beams with two layers cross section were numerically simulated. Regarding the results obtained , the models would well predict the structural behavior and crack patterns of beams. Ensuring the efficiency and accuracy of the adopted constitutive model to predict the structural behavior and crack patterns of beams, the numerical FE models used to simulate the added hardening deflection fiber reinforced layer to the bottom of geopolymer concrete beams. The numerical results revealed that adding a thin fiber reinforced layer to geopolymer concrete beams results in increasing ultimate load capacity, ultimate deflection, and ductility. The greatest enhancement in the flexural performance of the strengthened beams was found in the ultimate load capacity of the strengthened beams. |
| Databáze: | OpenAIRE |
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