水电站明钢管受力机制及加强构件的参数敏感性分析  

Analysis on mechanical characteristics of reinforcement members and parameter sensitivity of exposed steel pipe in hydropower station

作　　者：刘敬敏 杨岩岩 夏雨[1] 郭杭岡 LIU Jingmin;YANG Yanyan;XIA Yu;GUO Hanggang(School of Civil Engineering and Architecture,Guangxi University of Science and Technology,Liuzhou 545006,Chi-na;Yuangou Architects&Consultants,Shanghai 200233,China;Zhejiang Design Institute of Water Conservancy&Hydro-electric Power,Hangzhou 310002,China)

机构地区：[1]广西科技大学土木建筑工程学院,广西柳州545006 [2]上海原构设计咨询有限公司,上海200233 [3]浙江省水利水电勘测设计院,杭州310002

出　　处：《桂林理工大学学报》2023年第4期639-645,共7页Journal of Guilin University of Technology

基　　金：广西自然科学基金项目(2018GXNSFBA281186;2020JJA160008);广西科技基地和人才专项(桂科AD19245125);柳州市科技计划项目(2021CBA0105);广西高校中青年教师科研基础能力提升项目(2019KY0375)。

摘　　要：从力学机制和承载特性阐明了水电站明钢管的计算模型和典型断面;利用解析法和有限元法对水电站明钢管4个典型断面进行应力计算,通过对比分析明钢管4个典型断面的应力,揭示了两种计算方法的异同以及明钢管各部位的受力机制;进一步研究了支承环和加劲环两个部位的应力特点,并分析讨论了支承环和加劲环尺寸对这两个部位的影响。结果表明,随着支承环与加劲环高度与厚度比例的增加,支承环与加劲环及其近旁管壁单元的Mises应力值逐渐减小,且水电站明钢管的支承环和加劲环处受力情况复杂,解析法得到的等效应力值比有限元法的大,存在一些不合理的地方,因此建议采用有限元法对水电站明钢管结构进行受力分析。The calculation models and typical sections of exposed penstocks in hydropower station are illustrated based on mechanical mechanism and the bearing characteristics.On the basis of the calculation models of ex-posed penstocks,stresses on four typical sections of exposed penstocks in hydropower station are analyzed by an-alytical and finite element methods.The similarities and differences between the two methods and the stress mechanism of the exposed penstocks are revealed according to contrastive analyzing stresses on the four typical sections of the exposed penstocks.The stress characteristics of the size of the supporting ring and stiffening ring are studied,and the influence of the supporting ring and stiffening ring on these two typical sections is analyzed and discussed.The results show that,with the increase of the ratio of height to thickness of supporting ring and stiffening ring,the Mises stress values of stiffening ring and supporting ring and their adjacent pipe wall ele-ments decrease gradually.Moreover,the stress of the supporting ring and stiffening ring of exposed penstocks in hydropower station is complex.Meanwhile,the equivalent stress values obtained by the analytical method are greater than the values obtained by the finite element method,and there are some unreasonable places.There-fore,it suggests that the finite element method should be used for the stress analysis of the exposed penstocks in hydropower station.

关 键 词：明钢管 典型断面 受力机制 解析法 有限元法 

分 类 号：TV732.4[水利工程—水利水电工程]