建筑结构学报2011，Vol.32Issue(4)：142-150,9.
主管壁加厚方钢管T型节点滞回性能研究
Study on hysteretic behavior of square tubular T-joints with increased chord thickness
摘要
Abstract
In order to study the hysteretic performance of square tubular T-joints with increased chord thickness, experiments and numerical simulation were carried out on a full-scale square tubular T-joint with normal chord thickness and one with thickened chord.Low-cycle loading was applied to the specimens using displacement control method.The deformation and the failure mode were studied.The corresponding indices of seismic behavior, such as the ductility ratio and energy dissipation ratio, were also analyzed.It can be concluded that the hysteretic performance of the square tubular T-joints is improved greatly by increasing the chord thickness.The failure mode is changed from fracture at weld toe with obvious characteristics of ductile behavior to yielding at the chord intersection.After the testing, finite element analysis was carried out.The FEA results agreed with the test results reasonably well.Finally, effects of strengthening parameters on the hysteretic performance were studied based on finite element analysis.The strengthening parameters include the thickened chord length and chord thickness.It can be suggested that the reinforced length should not exceed 3 times of the brace section height.The increased thickness also should not exceed 0.8 times of the chord thickness for improving the hysteretic performance efficiently.关键词
方钢管T型节点/主管壁加厚/拟静力试验/数值模拟/滞回性能Key words
square tubular T-joints/ chord thickening/ quasi-static test/ finite element simulation/ hysteretic performance分类
建筑与水利引用本文复制引用
李涛,邵永波..主管壁加厚方钢管T型节点滞回性能研究[J].建筑结构学报,2011,32(4):142-150,9.基金项目
国家自然科学基金项目(50808153),山东省自然科学基金项目(ZR2009FM014). （50808153）
