基于有限元模型的建筑混凝土柱屈曲承载力计算

Calculation of Buckling Capacity of Building Concrete Columns Based on Finite Element Model

为了解决传统混凝土承载力算法存在峰值负荷计算值误差较大的问题,本文提出基于有限元模型的建筑混凝土柱屈曲承载力计算方法。通过有限元模型,对混凝土柱进行有限元数值模拟分析,模拟其屈曲力学性能,判断混凝土柱整体抗屈曲强度,确定屈曲承载力极限时的应力-应变关系曲线,并完成曲线参数计算。此次算法与两种传统算法进行对比实验,对三组混凝土柱试件进行破坏,比较峰值负荷计算值和试验值,结果表明,此次算法减小了峰值负荷的计算误差,此次算法的屈曲承载力计算结果更为准确。

In order to solve the problem of large error in peak load calculation of traditional concrete bearing capacity algorithm,a calculation method of building concrete column buckling bearing capacity based on finite element model is proposed in this paper.Through the finite element model,the finite element numerical simulation analysis of the concrete column is carried out to simulate its buckling mechanical properties,to judge the overall buckling strength of the concrete column,to determine the stress-strain curve of the limit of the buckling bearing capacity,and complete the curve parameter calculation.The results show that the algorithm reduces the calculation error of peak load and the calculation results of buckling bearing capacity are more accurate.