主管受撞T型管节点抗冲击性能研究  

Impact performance studies of T-tubular joint impacted on the chord

作　　者：曲慧[1] 褚飞[2] 

机构地区：[1]烟台大学土木工程学院,山东烟台264005 [2]山东建筑大学土木工程学院,济南250101

出　　处：《船舶力学》2011年第11期1306-1314,共9页Journal of Ship Mechanics

基　　金：国家青年科学基金项目(51108399);山东省高等学校科技计划项目(J11LE11)

摘　　要：突发事件引起的碰撞会造成海洋平台管桁架结构严重损伤,特别是管节点的破坏,严重时将导致平台报废。文中根据工程中常用的管节点参数确定典型分析节点,采用非线性有限元分析方法,分析主管受到碰撞的管桁架T型节点的变形发展过程,确定节点的破坏模态;在对冲击力、位移、应变和落锤速度等时程曲线的分析中,揭示抗冲击工作机理。分析结果表明:节点变形以受撞区域的主管上表面发生局部屈曲为主,节点的整体变形相对较小,并在主管上表面形成"8"字型塑性铰线。Jacket offshore platform structure can be severely damaged by collision accident,especially tubular joint failure will lead offshore platform discard.On the base of common parameter,typical analytical joint is determined,and the nonlinear finite element method is used to simulate the deformation development and determined failure model of T-tubular joint in tubular truss under impacted loading.Impact resistance mechanical mechanism is revealed by analyzing impact force,displacement,strain and hammer velocity time history curves.The analysis result shows that the main deformation of tubular joint impacted on the chord is local buckling at impact zone,and whole deformation of joint is small,and ＂8＂ shape yield line deforms on the surface of chord.

关 键 词：管节点 主管 冲击 破坏模态 工作机理 

分 类 号：TU398[建筑科学—结构工程]