基于立方体抗压强度的塑性混凝土劈裂抗拉强度预测研究

摘要

为建立基于立方体抗压强度的塑性混凝土劈裂抗拉强度预测式,收集了106组关于塑性混凝土劈裂抗拉强度与立方体抗压强度试验数据,在此基础上对我国现行规范推荐的预测式进行误差分析和修正.结果表明,规范GB 50010和DLT 5057推荐的预测式计算得到的塑性混凝土劈裂抗拉强度较实测值偏大,规范DLT 5057推荐的预测式误差较规范GB 50010小;修正后的预测式方差和标准差均较规范推荐预测式小,可供工程计算参考.%To establish the splitting tensile strength prediction formula of plastic concrete based on cube compressive strength,106 groups of data of plastic concrete's splitting tensile strength and compressive strength are collected, the error analysis and correction of the formula in current standards are given. The results show that the plastic concrete's splitting tensile strength calculated by the formula in GB 50010 is larger than the test value,and the error of the splitting tensile strength prediction formula in DLT 5057 is smaller than GB 50010;the splitting tensile strength calculated with the modified prediction formula is highly comparable to the test value,which will supply reference to the projects.