基于子模型法的CFST塔柱变截面区有限元分析  

Finite Element Analysis on Non-uniform Area of CFST Tubular Tower Based on Sub-model Method

作　　者：谢建雄[1] 蔡崇华 卢哲安[3] 任志刚[3] 刘楚豫 王涛 鲁万卿 

机构地区：[1]武汉理工大学理学院,武汉430070 [2]武汉市黄陂区公路管理局,武汉430300 [3]武汉理工大学道路桥梁与结构工程湖北省重点实验室,武汉430070 [4]交委质监站,武汉430070 [5]中国建筑第七工程局中南公司,武汉430070

出　　处：《武汉理工大学学报》2010年第13期62-66,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50508034)

摘　　要：结合子模型技术和试验,研究圆端形钢管混凝土塔柱及其变截面区,在几何和材料双非线性影响下,钢管内混凝土泊松比变化对核心混凝土承载力的影响;并考察结构在三轴应力下的最不利应力状态。结果表明:在考虑混凝土泊松比变化情况下,逐步改变核心混凝土泊松比,与不考虑混凝土泊松比变化的情况相比较,可使极限承载力比不考虑混凝土泊松比变化时的计算值高,体现了钢管对核心混凝土的套箍作用;运用子模型法对变截面区作了精确的受力分析,得到圆端形钢管混凝土塔柱在轴压和偏压荷载作用下的应力变化规律,找到结构在三轴应力下的最不利应力状态。Considering the geometrical physical nonlinearities simultaneously,the impacts of Poisson＇s ratio of core concrete on the bearing capacity of circleended CFST tubular tower and non-uniform area are analyzed with the sub-model technology and test,and the most disadvantaged stress state of the structure under the triaxial compression are researched.The results indicate that： with the variable concrete Poisson＇s ratio.Comparatively,the bearing capacity analysis considering the variable concrete Poisson＇s ratio enables to enhance the design capacity,sub-model method is used to analyze the non-uniform area,the results reflect the change rules of stress of circle-end CFST tubular tower in axial compression case and eccentric compression case,in addition,the most disadvantaged stress state of the structure under the triaxial compression is found out.

关 键 词：圆端形钢管混凝土 三轴受压 泊松比 子模型法 

分 类 号：TU398[建筑科学—结构工程]