HTRCS加固RC偏压柱承载力计算方法研究

超强高韧性树脂钢丝网混凝土(HTRCS)是一种新型复合材料,由内嵌增强钢丝网和高性能树脂混凝土组成。为了获得HTRCS加固钢筋混凝土(RC)偏压柱正截面承载力的计算式,进行了材料性能试验研究,得出了加固材料的本构关系,结合已完成的HTRCS侧面加固RC偏压柱试验,对偏压柱的承载力进行了理论分析。根据试件破坏特征,不考虑钢丝网的抗压作用及树脂混凝土的抗拉作用,通过平截面假定,采用普通混凝土等效矩形应力图和树脂混凝土等效梯形应力图简化计算,提出了远轴侧加固和近轴侧加固偏压柱的两种正截面承载力计算公式,计算结果与试验值吻合较好,可为后续研究及工程应用提供理论依据。

Research on calculation method of bearing capacity of strengthened RC eccentric compression columns with HTRCS

High toughness resin concrete with steel wire mesh(HTRCS) is a new type of composite material, which consists of embedded reinforced steel wire mesh and high performance resin concrete. In order to obtain the calculation formula for the bearing capacity of the normal section of reinforced concrete(RC) eccentric compression columns strengthened by HTRCS, the experimental study on material properties was carried out, and the constitutive relationship of the reinforced materials was obtained. Combined with the completed test of RC eccentric compression columns side-strengthened by HTRCS, the bearing capacity of eccentric compression columns was analyzed. According to the failure characteristics of specimens, the compressive effect of steel wire mesh and the tensile effect of resin concrete were not considered. Based on the assumption of plane section, the equivalent rectangular stress diagram of ordinary concrete and the equivalent trapezoidal stress diagram of resin concrete were used to simplify the calculation. Two formulas for calculating the bearing capacity of normal section of eccentric compression columns strengthened at the far-axis side and near-axis side were proposed. The calculated results were in good agreement with the experimental values, which can provide theoretical basis for subsequent research and engineering application.