完全叠接管节点在低周循环载荷下的破坏模式研究  

Failure analysis of offshore tubular joints under seismic loading

作　　者：秦飞[1] GHO W M FUNG TC Soh C K 

机构地区：[1]北京工业大学机电学院,北京100022 [2]ESG Engineering Pte. [3]School of Civil and Structural Engineering,Nanyang Technological University,singapore639798

出　　处：《海洋工程》2002年第1期29-35,共7页The Ocean Engineering

基　　金：新加坡科技发展局资助

摘　　要：采用实验和数值模拟方法研究了一种新型海洋平台管节点在地震载荷下的响应和破坏情况。采用拟静态循环加载模拟地震载荷 ,对真实尺寸的试件进行实验 ,研究局部屈曲和裂纹等对管接点抗震性能的影响。能量分析表明 ,发生在斜支管中的局部屈曲消耗了大部分输入能量。与现在使用的N型管节点相比 ,该新型管节点有较好的抗震性能。采用有限元数值模拟方法分析比较了不同尺寸配置下 。Failure mode and seismic behavior of an innovation offshore tubular joint, a completely overlapped joint or COJ, are investigated by use of experimental and numerical methods. With quasi-static cyclic loading to simulate earthquake, a full-scale COJ joint is tested in the Lab. The influence of local buckling and cracking on the failure of the joint is examined. Energy analysis indicates that the local inelastic buckling in the through brace dissipates most of the input energy. Comparison of N-joints shows that COJ has better seismic performance. A parametric study is carried out by using finite element method to investigate the influence of different geometry configurations on the hysteresis curves of the joints.

关 键 词：管节点 抗震性能 非弹性大变形 循环载荷 有限元分析 海洋平台 破坏模式 

分 类 号：P752[天文地球—海洋科学]