受约束混凝土的力学行为

• 作 者: 刘晚成
• 机 构: 东北林学院,
• 出 处: 混凝土及加筋混凝土
• 发表日期: 1985年04期
• 关键词: 微元体 约束混凝土 核心混凝土 切线模量 切向应力 钢管混凝土 虎克定律 径向应力 面圆 轴心受压构件

在钢管混凝土轴心受压构件的加载实验中,核心混凝土是处于典型的横向受约束状态。令作用在距离载面圆心为r的微元体上的径向应力为σ_r,切向应力为σ_t,轴向应力为σ_2,钢管内径为r_1,外径为r_0,钢的切线模量为E,松比为ν,微元体在轴向、切向和径向的应变分别为ε_z、ε_tε_r、根据广义虎克定律,微元体的应变和应力之间的关系可写成如下形式。

In loading experiments of axially loaded concrete filled steel tubular members, the core concrete is in a typical laterally constrained state. Let the radial stress acting on the micro element centered on the center of the bearing surface be σ_r, the tangential stress σ_t, the axial stress σ_2, the inner diameter of the steel tube r_1, the outer diameter r_0, and the tangent modulus of the steel E. The ratio of the pine to the ν is the strain in the axial, tangential, and radial directions of the element element ε_z, ε_tε_r, respectively. According to the generalized Hooke’s law, the relationship between the strain and the stress of the element can be written as follows.