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通过 2 2根钢管高强混凝土柱的轴压试验 ,验证了高强混凝土结构技术规程有关钢管高强混凝土构件初始压缩刚度的算式。研究给出套箍指标为 0 2 8～ 1 1的钢管高强混凝土峰值应力、峰值应变、平台应力 (即残余应力 )、平台初始应变的算式 ;给出了钢管高强混凝土应力 应变全曲线方程及曲线参数的建议公式
Through the axial compression tests of 2 2 steel-tube high-strength concrete columns, the formula of the initial compression stiffness of high-strength concrete-filled steel tubular members with respect to the technical regulation of high-strength concrete structures is verified. The formulas of peak stress, peak strain, platform stress (ie residual stress) and initial stage strain of steel-reinforced concrete with hoop index of 0 2 8 ~ 1 1 are given. The full-scale stress-strain curve and curve The recommended formula for the parameter