基于OpenSEES的RC柱拟静力实验数值分析

OpenSEES-based on numerical analysis of quasi-static test of reinforced concrete column

采用OpenSEES软件中基于位移法梁柱单元建模时,需要人为事先定义单元模型参数。为了验证参数取值对数值模拟结果精度的影响,基于钢筋混凝土中柱C的拟静力实验数据,进行建模参数敏感性分析。结果表明:基于位移法梁柱单元建模时,积分点个数及混凝土纤维划分数量对模拟结果的影响并不十分敏感;与纤维截面纤维个数、积分点个数相比,单元个数对模拟精度的影响更大。单元划分数量、单元个数为5、积分点个数在5和7之间可以提高模拟精度。

This paper presents an experimental numerical analysis motivated by the need for artificial predefinition of model parameters,such as occurs due to the use of displacement-based beam-column element of the OpenSEES software. This research aimed at verifying the effect of parameters on the numerical simulation accuracy builds on model parameters sensitivity analysis using quasi-static test data of RC middle column C. The study demonstrates that numbers of integration points and concrete fibers are not sensitive to simulation effect when the displacement-based beam-column element is used; and numbers of elements provide a greater effect on simulation accuracy than numbers of integration points and concrete fibers. The improved simulation accuracy may result when both the numbers of integration points and the numbers of elements are five and the numbers integration points range between five and seven.