FRP约束橡胶混凝土的轴心受压承载力分析

Analysis of axial compressive bearing capacity of FRP confined rubber concrete

为准确计算纤维增强聚合物(fibre reinforced polymer,FRP)约束橡胶混凝土的抗压强度,对相关文献的FRP约束橡胶混凝土抗压强度模型进行归纳与总结,并采用已发表相关文献的122个试验数据,对相关文献抗压强度模型的准确性进行评估,得到了影响FRP约束橡胶混凝土抗压强度模型准确性的关键参数,即混凝土粗、细骨料的橡胶颗粒体积替换率和FRP的种类.在评估结果的基础上,通过考虑橡胶颗粒替换率系数和FRP种类,建立了抗压强度模型.新建立的抗压强度模型预测值与试验值更为接近,误差评估指标值仅为0.09.

To accurately calculate the compressive strength of fibre reinforced polymer(FRP)confined rubber concrete,the existing compressive strength models of FRP confined rubber concrete of related literature were analyzed.The 122 test data collected from literature were used to evaluate the accuracy of the existing model.The evaluation results show that rubber particle volume replacement rate of concrete coarse and fine aggregates and the FRP type have significant effect on the compressive strength of FRP confined rubber concrete.Based on the evaluation results,a new compressive strength model with considering rubber particle replacement rate coefficient and FRP type was established.The predicted value of the new compressive strength model is relatively close to the test value,and the error evaluation index value is 0.09.