大型复材储罐罐顶新型加固技术及稳定性分析  

A New Reinforcement Technique and Stability Analysis for Large Composite Storage Tank Roofs

作　　者：梁旭 王云浩 谭力豪 胡黎俐 冯鹏[3] LIANG Xu;WANG Yunhao;TAN Lik-ho;HU Lili;FENG Peng(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Transportation Science and Engineering,Beihang University,Beijing 100191,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]北京航空航天大学交通科学与工程学院,北京100191 [3]清华大学土木工程系,北京100084

出　　处：《工业建筑》2024年第1期140-146,共7页Industrial Construction

基　　金：国家重点研发计划(2022YFC3801800);中国青年人才托举基金(2022QNRC001)。

摘　　要：大型储罐罐顶的罐壁薄、跨度大,在外压作用下容易出现失稳问题。以某大型2万t复材储罐典型工程为例,针对其罐顶稳定性提升的需求,提出复材拱加固、复材拱–工字钢–槽钢组合加固、工字钢-槽钢组合加固、三角钢桁架加固罐顶等四种加固方案,并建立有限元模型对加固前后的储罐进行特征值屈曲分析。结果表明,加固前罐顶稳定系数为1.29,远小于GB150—1998《钢制压力容器》的要求(稳定系数为15)。除复材拱加固外,其余应用钢结构与复材进行组合的加固方案均有较好的效果,加固后罐顶稳定系数均满足GB150—1998的要求。在此基础上,综合分析了各加固方案的造价及施工工艺,结果表明小截面三角钢桁架加固复材罐顶为最优方案,为大型复材储罐罐顶的加固和优化设计提供技术参考。The roof of large storage tank is prone to instability under external pressure due to its thin wall and large span.Taking a large 20000-ton composite storage tank as an example,in order to improve the stability of the tank roof,four reinforcement schemes were proposed,such as composite arch reinforcement,composite arch-I-beam-channel steel combined reinforcement,I-beam-channel steel combined reinforcement,and triangular steel truss reinforcement.A finite element model was established to perform buckling analysis of the tank roof before and after reinforcement.It was shown that the stability coefficient of the tank roof before reinforcement was 1.29,which was much smaller than the requirements of a stability coefficient of 15 in Steel pressure vessels(GB 150—1998).Except for the composite arch reinforcement,other reinforcement schemes that combined steel structures with composite materials exhibited favorable effects,and the stability coefficient of the tank roof after reinforcement could meet the requirements of GB 150—1998.Based on this,the cost and construction processes of each reinforcement scheme were systematically analyzed.The small cross-sectional triangular steel truss reinforcement scheme was identified as the optimal solution for the composite tank roof,which could provid technical reference for the reinforcement and optimization design of large composite storage tank roofs.

关 键 词：复材 大型储罐 加固 钢桁架 稳定系数 

分 类 号：TH49[机械工程—机械制造及自动化]