摘要
采用了数值有限元和弹塑性理论解析方法,对某海洋平台结构受大型船舶冲撞的斜撑受损构件进行承载能力分析,同时对灌浆卡箍维修方案进行了理论分析与数值计算,分析评价了灌浆卡箍的修理方法。利用混凝土强度理论von Mises破坏准则,建立灌浆卡箍的轴向受拉、轴向受压和面内弯矩作用下的非线性有限元模型进行计算,与理论分析所得的承载能力设计值比较表明,灌浆卡箍的轴向抗拉、抗压承载能力要比原钢管强,但其抗弯承载能力不如原钢管。对照APIRP2A规范提供的设计值进行分析比较表明,其加固方案是安全的,用它进行海洋平台结构受损构件的承载能力及加固分析是可行的。
Finite element method and elastic-plastic theory are applied to the bearing capacity analysis of the damaged members of an offshore platform collided by the large tonnage Derrick & Lay Barge, the local dent shape of Soreide is adopted to solve the terminal bend moment. On the base of theory analysis and the practical experience, the grouted clamp repairing and strengthening scheme is evaluated. In the repair plan, the brace is grouted and high strength bolt is used to connect the grout and the exterior pipe. The von Mises criterion of concrete strength is introduced into finite element model under loads of axial pulling, axial pressing and planar bending moment. Compared with the theoretical stress states of the member, the bearing capacities of grouted clamp under loads of axial pulling and compressing are better than that of the original steel tube, but the bearing capacity of grouted clamp under planar bending is less than that of the original steel tube. With reference to APIRP2A, the present method is feasible to design and analysis of bearing capacity and strengthening of damaged members of offshore platform structures.
出处
《工程力学》
EI
CSCD
北大核心
2003年第5期100-105,共6页
Engineering Mechanics
基金
国家自然科学基金资助项目(59895410
59779002)
海洋石油工程股份有限公司资助
关键词
海洋平台
受损构件
灌浆卡箍
力学特性
有限元模型
offshore jacket platform
damaged member
grouted clamp
mechanics property
finite element model
