摘要
对尺寸为300 mm×300 mm×300 mm的立方体混凝土试件进行4种应变速率(10~(-5)、10~(-4)、5×10~(-4)、10~(-3))和5种侧压(0、2 MPa、4 MPa、6 MPa、8 MPa)下的劈拉试验,对比分析有侧压混凝土动态劈拉受荷全过程的力学特性及变化规律。研究结果表明,有侧压混凝土材料劈拉强度随应变速率增大而增大,不同应变速率下混凝土劈拉强度随侧压增大均表现出先增大后减小的变化规律,不同应变速率下混凝土最大劈拉强度对应的侧压比基本相等。
The concrete dynamic splitting tensile experiments on four strain rates(10~(-5), 10~(-4), 5×10~(-4), 10~(-3)) and five lateral pressures(0, 2 MPa, 4 MPa, 6 MPa, 8 MPa) of the cube concrete specimen with 300 mm×300 mm×300 mm were carried out. And the concrete dynamic splitting tensile mechanic characteristic and changing rule of the whole process with lateral pressure were Compared and analyzed. The research results show that the tensile strength of concrete under lateral pressure increases with the increase of strain rate. And the splitting tensile strength of concrete under different strain rate firstly increases then decreases with the increase of lateral pressure. The lateral pressure ratio of the maximum tensile strength of concrete is basically same under different strain rates.
引文
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