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以两组(Z4组、Z3组)尺寸、材料、配筋形式、荷载完全相同的整浇柱与带缝柱的试验数据为基础,采用基于材料本构关系的纤维模型对整浇柱及带缝柱的滞回特性进行数值模拟。在纤维模型中,采用非线性零长截面单元来模拟施工缝,同时考虑缝面处钢筋的滑移以及剪切恢复力模型来模拟带缝柱的静力非线性行为。通过模拟结果与试验数据进行对比,验证模型的可行性,提出一种施工缝模型化的方法。
Based on the experimental data of two groups (Z4 group and Z3 group) of size, material, reinforcement form, identical load-bearing monolithic columns and slotted columns, the fiber model based on the material constitutive relation Hysteresis characteristics of the columns were numerically simulated. In the fiber model, nonlinear zero-length cross-section elements are used to simulate the construction joints, and the static nonlinear behavior of the slotted pillars is modeled considering the slippage of steel bars and the shear restoring force model. By comparing the simulation results with the experimental data and verifying the feasibility of the model, a method of modeling construction joints is proposed.