向家坝升船机塔柱简化结构大震不倒研究
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摘要
鉴于齿轮齿条式升船机过坝速度快、运行安全可靠,已在我国的大型水利水电工程中得到广泛应用。但是齿轮齿条式升船机结构型式复杂,其抗震研究基础薄弱,现行抗震规范中均没有专门针对该结构抗震设计的条文,因此急需进行抗震研究。本文对地震设防烈度达8度的向家坝升船机塔柱结构,采用静力和动力弹塑性分析方法,研究了大型升船机塔柱结构的薄弱部位和可能的破坏模式,分析结果与该结构的振动台模型试验结果规律一致。研究结果进一步表明该升船机结构抗震设计合理,具有多道抗震防线,有较好抗超设计地震的能力。
The vertical gear-rack typed ship-lift has widely applied in large water conservancy and hydropower projects in China,in view of its fast speed of passing dam and its safe and reliable operation. Because of its complex structure and lack of foundation of seismic research,the research on seismic theory and technique for vertical gearrack typed ship-lift is urgently needed. Firstly,static and dynamic elasto-plastic analysis method are used to study the weak parts and possible failure modes of the ship lift tower,the comparison of test and analysis results shows the failure laws are equal between shake table test and elasto-plastic analysis. The analysis results further indicate that the structure are reasonable designed to have better seismic performances with multiple seismic fortification lines against exceeding design earthquake.
The vertical gear-rack typed ship-lift has widely applied in large water conservancy and hydropower projects in China,in view of its fast speed of passing dam and its safe and reliable operation. Because of its complex structure and lack of foundation of seismic research,the research on seismic theory and technique for vertical gearrack typed ship-lift is urgently needed. Firstly,static and dynamic elasto-plastic analysis method are used to study the weak parts and possible failure modes of the ship lift tower,the comparison of test and analysis results shows the failure laws are equal between shake table test and elasto-plastic analysis. The analysis results further indicate that the structure are reasonable designed to have better seismic performances with multiple seismic fortification lines against exceeding design earthquake.
引文
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[3]汪梦甫,周锡元.高层建筑结构抗震弹塑性分析方法及抗震性能评估的研究[J].土木工程学报,2003,36(11):44-49.WANG Mengfu,ZHOU Xiyuan.Modified pushover analysis and seismic performance evaluation for tall building[J].China Civil Engineering Journal,2003,36(11):44-49.(in Chinese)
[4]陆新征,叶列平,缪志伟,等.建筑抗震弹塑性分析-原理、模型与在ABAQUS,MSC.MARC和SAP2000上的实践[M].北京:中国建筑工业出版社,2009.LU Xinzheng,YE Lieping,MIAO Zhiwei,et al.Elasto-plastic analysis of buildings against earthquake-theory,model and implementation on ABAQUS,MSC.MARC and SAP2000[M].Beijing:China Architecture&Building Press,2009.(in Chinese)
[5]林旭川,陆新征,缪志伟,等.基于分层壳单元的RC核心筒结构有限元分析和工程应用[J].土木工程学报,2009,42(3):49-54.LIN Xuchuan,LU Xinzheng,MIAO Zhiwei,et al.Finite element analysis and engineering application of RC core-tube structures based on the multilayer shell elements[J].China Civil Engineering Journal,2009,42(3):49-54.(in Chinese)
[6]北京金土木软件技术有限公司等编著.SAP2000中文版使用指南[M].北京:人民交通出版社,2008.Beijing Civil King Software Technology Co.,Ltd.Guide for using chinese version of SAP2000[M].Beijing:China Communications Press,2008.(in Chinese)
[7]Kent D C,Park R.Flexural members with confined concrete[J].Journal of the Structural Division,ASCE.1971,97(7):1969-1990.
[8]D S B,R P,N P M J.Stress-Strain Behavior of Concrete Confined by Overlapping Hoops at Low and High Strain Rates[J].ACI Journal Proceedings.1982,84(04):13-27.
[9]高建勇,胡晓,张艳红,等.某大型升船机塔柱结构模型振动台试验研究[J].地震工程与工程振动,2013,33(5):83-92.GAO Jianyong,HU Xiao,ZHANG Yanhong,et al.Shaking table test on a structural model of a large ship lift tower[J].Earthquake Engineering and Engineering Dynamics,2013,33(5):83-92.(in Chinese)
[10]Anil K.Chopra.Dynamics of Structures:Theory and Applications to Earthquake Engineering(3rd Ed.)[M].北京:清华大学出版社,2009.
[11]ATC-40 Seismic Evaluation and Retrofit of Concrete Building(Volume 1)[S].Redwood City,California:Applied Technology Council,1996.
[12]JGJ3-2010高层建筑混凝土结构技术规程[S].2011.JGJ3-2010 Technical Specification for Concrete Structures of Tall Building[S].Beijing,2011.(in Chinese)
[13]钱稼茹,纪晓东,范重,等.国家体育场大跨度钢结构罕遇地震性能分析[J].建筑结构学报,2007,28(2):17-25.QIAN Jiaru,JI Xiaodong,FAN Zhong,et al.Seismic behavior analysis of large-span steel structure of the National Stadium under severe earthquake[J].Journal of Building Structures,2007,28(2):17-25.(in Chinese)
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