建筑结构学报2011，Vol.32Issue(4)：134-141,8.
平面KT型圆钢管搭接节点有限元参数分析与承载力计算
Finite element parametric analysis and design equation of bearing capacity for unstiffened uniplanar overlapped CHS KT-joints
摘要
Abstract
A nonlinear finite element model simulating the behavior of unstiffened overlapped CHS KT-joints was generated and validated by comparing failure mode, deformation process and load carrying capacity with test results.This study revealed the failure process and propagation of plasticity of overlapped joint with vertical through brace in compression and hidden weld.In particular, the effects of geometric parameters and hidden weld on ultimate load carrying capacity of the joints were examined.The results of finite element parametric analysis indicate that diameter ratio of brace versus chord and half diameter to thickness ratio of the chord have significant effect on the maximum load carrying capacity of overlapped joints, while brace to chord thickness ratio and overlap ratio have little effect on the maximum load carrying capacity.The load carrying capacity of overlapped CHS KT-joints is greater than that of zero gap KT-joints and N-joints.The absence of hidden welds obviously reduces the load carrying capacity of the vertical through brace in compression overlapped CHS KT-joints.Finally, based on the design equation of zero gap N-joint, a formula predicting the load carrying capacity of overlapped CHS KT-joint with or without hidden weld was proposed using multivariate regression analysis.Results obtain using the proposed design equation agrees well with experimental results.With good consistency, the equation can be widely applied to different brace geometries.关键词
平面KT型圆钢管搭接节点/N型零间隙节点/有限元参数分析/承载力Key words
unstiffened uniplanar overlapped CHS KT-joint/ zero gap N-joint/ finite element analysis/ bearing capacity分类
建筑与水利引用本文复制引用
陈誉,赵宪忠..平面KT型圆钢管搭接节点有限元参数分析与承载力计算[J].建筑结构学报,2011,32(4):134-141,8.基金项目
国家自然科学基金项目(51008133),福建省自然科学基金计划项目(2010J01299),大连理工大学海岸和近海工程国家重点实验室基金项目(LP0705),泉州市第-批技术研究与开发项目(重点项目)(2009Z48). （51008133）
