However, local buckling is more likely to occur for thin-walled tubes, and thus decreases the lateral confinement on the concrete core. 但薄壁钢管在荷载较大时易发生局部屈曲,且降低对混凝土的约束。
New formulae for effective confinement area and lateral confinement pressure are proposed. 提出了新的有效约束面积模型及侧向约束压力计算公式。
For the same lateral confinement, high strength concrete columns develop lower strength enhancement than normal strength concrete columns. 在相同的侧向约束下,高强混凝土柱的核心强度提高幅度低于普通混凝土柱。
The relationships between the axial compressive stress, axial and lateral strains of the concrete columns were analyzed, an efficiency factor of CFRP strain is proposed and the lateral confinement mechanism of FRP materials for rectangular columns is explored. 试验研究了碳纤维布约束混凝土柱的破坏形态及轴压应力与轴向、横向应变之间的变化曲线,确定了碳纤维布的有效应变系数。探讨了FRP材料约束混凝土矩形柱的侧向约束机理;
Chapter 6 : carry out compression tests of concrete specimens under different loading rates with different lateral confinement in one direction, and establish dynamic failure criterion under complex stress state considering the effect of loading rate and lateral confinement level. 第六章进行了混凝土立方体试块在不同侧向约束应力水平和不同纵向加载速率量级下力学性能的实验研究,建立了混凝土复杂应力状态下的动态破坏准则。