载荷重新分担对膨胀式自应力灌浆卡箍防滑和防撬设计影响

发布时间：2018-05-15 23:20

本文选题：维修加固 + 膨胀式自应力灌浆卡箍　；参考：《海洋工程》2016年06期

【摘要】：传统的卡箍设计方法是通过建立海洋平台有限元模型并在强度分析基础上提取受损单元处完好时的最大载荷,将此载荷作为卡箍设计的初始条件。而卡箍实际承担的是平台安装上卡箍之后载荷重新分担下相应受损处承受的载荷,一般会比初始设计载荷大。着重研究载荷重新分担对膨胀式自应力灌浆卡箍防滑设计和防撬设计的影响,针对渤海湾中主要承受冰载荷作用的一个典型平台结构,提出了在线单元平台有限元模型上近似模拟卡箍的方法,提取载荷重新分担下的卡箍设计载荷进行了分析。结果表明载荷重新分担对卡箍防滑设计影响较小,但对防撬设计有着显著影响,并对此提出了在螺栓设计时增加螺栓预紧力安全系数的应对措施。
[Abstract]:The traditional clamping design method is based on establishing the finite element model of the offshore platform and extracting the maximum load when the damaged element is intact on the basis of strength analysis. The load is regarded as the initial condition of the clamping design. What the clamping actually bears is that the load after the platform is installed with the clamps redistributes the load under the corresponding damage, which is generally larger than the initial design load. The influence of load redistribution on anti-skid design and anti-pry design of expansion self-stress grouting clamps is studied emphatically, aiming at a typical platform structure which mainly bears ice load in Bohai Bay. A method of approximate simulation of clamps on the finite element model of on-line element platform is proposed, and the design load of clamps under load redistribution is extracted and analyzed. The results show that the load redistribution has little effect on the anti-skid design of the clamps, but it has a significant effect on the anti-skid design, and puts forward the countermeasures to increase the safety factor of the bolt pre-tightening force in the bolt design.
【作者单位】：中国海洋大学工程学院;海洋石油工程股份有限公司设计公司;
【基金】：中国海洋石油总公司科技项目资助(CNOOC-KJ125ZDXM05GC00GC2014-02)
【分类号】：P754

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