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分析了积分方案对基于柔度法梁-柱单元模型的影响,将高斯积分和钢筋混凝土梁、柱构件损伤特点结合起来,提出了考虑损伤分布的积分方法。将单元非线性区域划分为塑性铰区、开裂区、过渡区,一方面赋予高斯积分区域物理含义,另一方面使得塑性铰区域可以向相邻的开裂区、过渡区扩展,实现塑性铰长度动态变化。对钢筋混凝土框架结构进行静力非线性分析,结果表明:该积分方案更能反映梁、柱构件的实际损伤,具有较好的数值稳定性和收敛性。
The influence of integral scheme on beam-column element model based on compliance method is analyzed. By combining the Gauss integral with the damage characteristics of reinforced concrete beam and column element, an integral method considering damage distribution is proposed. Dividing the non-linear region of the cell into plastic hinge region, cracking region and transition region, on the one hand, gives the physical meaning of the Gaussian integral region. On the other hand, the plastic hinge region can extend to the adjacent cracking region and transition region, Variety. The results show that the integral scheme can better reflect the actual damage of beam and column members, and has better numerical stability and convergence.