摘要
为进一步研究初始缺陷对钢筋混凝土柱抗压承载力的影响,分别按照侧移二阶效应、挠曲二阶效应和模型柱方法建立钢筋混凝土固接柱的ABAQUS非线性有限元模型,并介绍在数值模型中实现固接柱初始缺陷的模拟方法.进行不同高宽比的参数分析.结果表明,初始缺陷对模型柱的抗压承载力影响最大,挠曲二阶效应的影响次之,侧移二阶效应的影响最小;考虑初始缺陷后,钢筋混凝土轴压柱的抗压承载力下降幅度最大可达50%左右.
In order to study the effect of initial imperfection on the bearing capacity of fix-ended RC columns,nonlinear FE models of fix-ended RC columns were established based on three methods：lateral displacement second-order effect,deflection second-order effect and model column method.Several simulation methods of modeling the initial imperfection in numeric models were also presented.Parametric analysis of fixed-ended RC columns with different height-width-ratio was developed.Comparison of the effect on the bearing capacity of RC columns among different cases was discussed in detail.As a result,the initial imperfection using model column method had great effect on the bearing capacity of RC columns,the effect of initial imperfection with flexural second-order effect take second place,and that of lateral displacement second-order effect was light,the maximum reduction even reached 50％ for RC columns subject to axial compression.
出处
《兰州理工大学学报》
CAS
北大核心
2013年第6期129-132,共4页
Journal of Lanzhou University of Technology
基金
国家自然科学基金资助(51208217)
关键词
钢筋混凝土柱
初始缺陷
固接
有限元
分析
reinforced column
initial imperfection
fix-ended
finite element
analysis
