Abstract
Stress-strain relation and stress block parameters of polymer concrete flexural compression members were experimentally investigated. For these purposes, a series of C-shaped polymer concrete specimens subjected to axial compressive load was tested. Based on the test results, we proposed an equation by which the stress-strain relation of polymer concrete can be predicted. In this model, we took account the slope of descending branch beyond the peak stress point of single curve. The proposed equation was numerically integrated to compute the rectangular stress block parameters. Computed <TEX>${\beta}_1$</TEX> was greater than the values prescribed in ACI 318 Code for cement concrete, and <TEX>$\gamma$</TEX> was about 0.85 that is similar to the value regulated in the ACI.
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