【摘要】 本文在引入表征高强钢筋数量的预应力度的基础上考虑最大变形和累积能量耗损的非线性组合,提出了适应于配有高强纵筋的混凝土墩柱的地震损伤模型。为验证该模型的正确性,采用有限元软件ANSYS模拟了配有不同数量的高强纵筋混凝土墩柱的滞回曲线、裂缝发展过程以及破坏情况,通过与Hindi和Sexsmith建议的混凝土墩柱的破坏等级相对照,验证了所提模型的正确性。通过将所提的损伤模型与现有的几种典型的混凝土墩柱的损伤模型作比较分析表明,所提的地震损伤模型比其它的地震损伤模型更能准确地表达配有高强纵筋的混凝土墩柱的损伤特征,与实际更相符合。更多还原

【Abstract】 In this paper,the seismic damage model of the improved Park-Ang seismic damage is proposed on the basis of considering prestressing degree and nonlinear combination of maximum deformation and accumulated energy dissipation for elements. To verify the improved model,the finite element software ANSYS was used to simulate the process of development of the cracks and the damage level of concrete piers which equipped with different amount of high-strength longitudinal reinforcement. The validity of the improved model was verified by study on the damage index curve and the results show that the improved seismic damage model is better and more consistent with the actual than the existing seismic damage model and it can accurately describe damage index of concrete piers with high-strength longitudinal reinforcement.更多还原