完全叠接K型管节点的应力集中系数的试验研究  

EXPERIMENTAL STUDY OF STRESS CONCENTRATION FACTOR FOR COMPLETELY OVERLAPPED K-JOINTS

作　　者：曲淑英[1] 张宝峰[1] 张国栋[1] 邵永波[1] 

机构地区：[1]烟台大学土木工程学院,山东烟台264005

出　　处：《工程力学》2009年第7期83-88,共6页Engineering Mechanics

基　　金：国家自然科学基金项目(10872178);山东省自然科学基金项目(Y2006F46);山东省"十一五"科技攻关计划项目(2006GG3208011)

摘　　要：海洋平台管节点的疲劳寿命预测通常采用S-N曲线方法,其中应力幅S的大小需由应力集中系数这个参数来确定。该文通过对大型完全叠接K节点试件在轴向载荷作用下应力集中系数的试验研究,得到了轴向载荷作用下完全叠接K节点焊缝周围的应力集中系数分布和应力集中系数极值点位置,从疲劳的角度证实了完全叠接管节点形式有利于主管的安全。The most commonly used method to predict the fatigue life of tubular joints in offshore engineering is S-N curve method, in which the hot spot stress （HSS） range along the weld toe is obtained by referring to the parameter named stress concentration factor （SCF）. In this study, a large completely overlapped K-joint specimen under axial load has been tested. The SCF distribution along the weld toes and the peak stress locations of the completely overlapped K-joint subjected to axial load were obtained. It is also approved that a completely overlapped joint is an effective joint type in protecting the chord from fatigue fracture.

关 键 词：完全叠接管节点 应力集中系数疲劳分析S-N曲线外推插值法 

分 类 号：TU392.3[建筑科学—结构工程]