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Title |
Stress Block of High Strength Polymer Concrete Flexural Members
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Keywords |
고강도 폴리머콘크리트; C형 시험체; 등가직사각형 응력블록; high strength polymer concrete; c-shaped specimen; effective rectangular stress block. |
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Abstract |
The stress-strain relationship of polymer concrete flexural member was evaluated using C-shaped polyester concrete specimen, the compressive strength of which is 1400 kgf/㎠. Eccentric compression test was performed to estimate the parameters, α, β1, γ for equivalent rectangular stress block. The ultimate moment strength ware obtained from the bending test on reinforced polymer concrete beams which were prepared with S different tensile steel ratios with a shear span ratio of 4.0. These values were compared with theoretical ultimate moment strengths, which were obtained using the parameters α=0.61 and β1=0.73 from stress-stain curves of C-shaped specimens. The results showed that, when tensile steel ratio was over 0.50 ρb, the experimentally obtained moment strengths were well matched with theoretically calculated values. In order to develop accurate criteria for polymer concrete flexural members, however, many other expermental studies for parameter determination are necessary using C-shaped specimens which have various compressive strengths and different sizes.
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