钢筋混凝土矩形空心墩延性能力数值分析

Numerical Analysis of Ductility of Reinforced Concrete Rectangular Hollow Piers

为了分析配筋率、轴压比、壁厚、及纵筋强度等参数对空心墩柱延性能力的影响,通过拟静力试验,研究了配箍率及剪跨比等参数对钢筋混凝土空心墩抗震性能的作用,同时通过建立混凝土矩形空心墩模型进行有限元分析,验证试验结果的准确性。结果表明:提高配筋率、轴压比及纵筋强度虽然能提高矩形空心墩柱的承载力,但会降低矩形空心墩柱延性能力,而提高配箍率与降低剪跨比却能在提高承载力的同时,也提高空心墩柱的延性能力。

In order to analyze the influence of reinforcement ratio,axial compression ratio,wall thickness and longitudinal reinforcement strength on ductility of hollow pier,this paper analyzed the effects of stirrup ratio and shear span ratio on seismic behavior of reinforced concrete hollow piers by pseudo-static test,and verified the accuracy of the test results through finite element analysis.The results showed that:as the reinforcement ratio,axial compression ratio and longitudinal reinforcement strength increase,the bearing capacity of rectangular hollow pier improve accordingly,but the ductility of rectangular hollow pier reduce,therefore the increase of stirrup ratio and the decrease of shear span ratio can not only increase the bearing capacity,but also improve the ductility of hollow pier columns.