基于非协调参数Drucker-Prager模型的预应力节段拼装混凝土桥墩滞回性能研究

混凝土的数值计算模型在滞回性能分析中往往比较难收敛，利用有限元软件ADINA提供Drucker-Prager模型的Cap修正屈服准则确立的非协调参数Drucker-Prager模型对预应力节段拼装混凝土桥墩进行数值分析，对预应力节段拼装桥墩在低周往复荷载作用下的滞回性能进行分析。通过比较采用非协调参数Drucker-Prager模型建立的数值模型计算得到的滞回曲线与试验得到的结果，两者吻合程度较高。基于这一成果可以通过数值模拟的方式获得预应力节段拼装桥墩的滞回曲线与相关数据，可应用于预应力节段拼装桥墩抗震计算和设计。

Study on hysteretic behavior of prestressed concrete segmental bridge piers based on an incompatible Drucker-Prager model

It is difficult in the convergence on the hysteresis analysis about numerical calculation of concrete. In this paper, Cap modified yield criterion for Drucker-Prager model of finite element software ADINA were used to establish an incompatible Drucker-Prager Model to build numerical model of prestressed concrete segmental bridge piers and the numerical model was used to analyze the hysteretic behavior under low cyclic loading. By comparing the result, the hysteretic curve obtained from the numerical model was similar to that obtained from the experiment. Based on this achievement, the hysteretic curve and relevant data of prestressed concrete segmental bridge piers by numerical simulation can be gotten. The achievements provide theoretical support for the development of prestressed concrete segmental bridge piers, which can be applied to seismic design and calculation of prestressed concrete segmental bridge piers, and can save some experimental resources.