基于主子系统耦合效应的直接空冷结构体系抗震性能研究
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摘要
直接空冷结构体系是火力发电厂随着空冷工艺出现而形成的一类特殊工业建筑,设备对结构动力特性影响显著。取1/4子结构,模拟边界条件,按1/8缩尺比制作模型。对模型进行动力特性测试,选择El-Centro波对模型进行拟动力试验,再进行拟静力试验,试验得到了动力特性参数及动力反应。分析结构自振频率与阻尼比变化、变形性能、滞回性能和破坏模式等;给出骨架曲线及其特征点。采用SAP2000有限元程序进行数值计算,分析结果与试验结果基本吻合。研究表明扭转振动是直接空冷结构体系的主要振型,应该考虑振型耦合;直接空冷结构体系为单道防线体系,大震下结构系统进入非线性后,设备系统能够保持弹性工作状态,结构易形成柱铰破坏机制。
Direct air cooled condenser support platform is used with the application of air cooled technology in thermal power plants. The equipments have significant influence on the dynamic behavior of such structures. Selecting a 1/4 substructure and imitating the boundary condition, a 1/8 scale model is constructed. Dynamic properties of the model are measured, and pseudo-dynamic and pseudo-static tests are carried out to study the seismic behavior of the structure. The model is subjected to El-Centro wave. The dynamic parameters and response of the structure under earthquake are obtained in the test. The variations of natural frequency of vibration and damping ratio, the deformation performance, the hysteretic behavior and the failure mode of the model are analyzed. The skeleton curve of the model and its characteristic points are also presented. Finite element analysis is performed by using SAP2000, and the calculation results are in agreement with the results of the model test. The study shows that torsion is one of the main vibration shapes of the coupled system, thus the coupling of vibration shapes must be considered. The structure is a single-prevention system. It is also found that the equipment system is elastic when the structure system yields in column hinge mechanism under seldom-occurred earthquake.
Direct air cooled condenser support platform is used with the application of air cooled technology in thermal power plants. The equipments have significant influence on the dynamic behavior of such structures. Selecting a 1/4 substructure and imitating the boundary condition, a 1/8 scale model is constructed. Dynamic properties of the model are measured, and pseudo-dynamic and pseudo-static tests are carried out to study the seismic behavior of the structure. The model is subjected to El-Centro wave. The dynamic parameters and response of the structure under earthquake are obtained in the test. The variations of natural frequency of vibration and damping ratio, the deformation performance, the hysteretic behavior and the failure mode of the model are analyzed. The skeleton curve of the model and its characteristic points are also presented. Finite element analysis is performed by using SAP2000, and the calculation results are in agreement with the results of the model test. The study shows that torsion is one of the main vibration shapes of the coupled system, thus the coupling of vibration shapes must be considered. The structure is a single-prevention system. It is also found that the equipment system is elastic when the structure system yields in column hinge mechanism under seldom-occurred earthquake.
引文
[1]Dekker N,Venter P,Parrock A.Direct air cooled condenser support platform at Matimba Power Station[J].The Civil Engineering in South Africa,1987,29(7):277-279
[2]张建华.大型直接空冷凝汽器支撑结构总体设计及力学计算[D].哈尔滨:哈尔滨工业大学,1998(Zhang Jianhua.General design and mechanical calculation on large direct air cooled condenser support structure[D].Harbin:Harbin Institute of Technology,1998(in Chinese))
[3]白国良,朱丽华,赵春莲,等.火力发电厂空冷平台研究现状及展望[J].哈尔滨工业大学学报,2007,39(Sup.2):538-542(Bai Guoliang,Zhu Lihua,Zhao Chunlian,et al.Present state and prospect of the air cooled condenser platform in thermal power plants[J].Journal of Harbin Institute of Technology,2007,39(Sup.2):538-542(in Chinese))
[4]Chen Y Q,Soong T T.State of the art review:seismic response of secondary systems[J].Engineering Structure,1988,10(4):218-228
[5]李杰,陈淮,赵晓.结构-设备动力相互作用研究综述[J].世界地震工程,1994,10(2):5-12(Li Jie,Chen Huai,Zhao Xiao.Review of research on dynamic interaction between structure and equipment[J].World Earthquake Engineering,1994,10(2):5-12(in Chinese))
[6]JGJ101—96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1996(Specification of testing methods for earthquake resistant building[S].Beijing:China Architecture and Building Press,1996(in Chinese))
[7]邱法维,钱稼茹,陈志鹏.结构抗震实验方法[M].北京:科学出版社,2000
[8]钱稼茹,赵作周,段安,等.CNP1000核电厂安全壳1∶10模型拟动力试验[J].土木工程学报,2007,40(6):7-13(Qian Jiaru,Zhao Zuozhou,Duan An,et al.Pseudo-dynamic tests of a1∶10model of pre-stressed concrete containment vessel for CNP1000nuclear power plant[J].China Civil Engineering Journal,2007,40(6):7-13(in Chinese))
[9]薛伟辰,程斌,李杰.双层双跨高性能混凝土框架抗震性能研究[J].土木工程学报,2004,37(3):58-65(Xue Weichen,Cheng Bin,Li Jie.Studies on seismic performance of double-story and double-span HPC frames[J].China Civil Engineering Journal,2004,37(3):58-65(in Chinese))
10]GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001(GB50011—2001Code for seismic design of buildings[S].Beijing:China Architecture and Building Press,2001(in Chinese))
11]爱德华L.威尔逊.结构静力与动力分析—强调地震工程学的物理方法[M].北京:中国建筑工业出版社,2006(Edward L Wilson.Static and dynamic analysis of structures[M].Beijing:China Architecture and Building Press(in Chinese))
12]杨溥,李英民,赖明.结构时程分析法输入地震波的选择控制指标[J].土木工程学报,2000,33(6):33-37(Yang Pu,Li Yingmin,Lai Ming.A new method for selecting inputting waves for time-history analysis.[J].China Civil Engineering Journal,2000,33(6):33-37(in Chinese))
[2]张建华.大型直接空冷凝汽器支撑结构总体设计及力学计算[D].哈尔滨:哈尔滨工业大学,1998(Zhang Jianhua.General design and mechanical calculation on large direct air cooled condenser support structure[D].Harbin:Harbin Institute of Technology,1998(in Chinese))
[3]白国良,朱丽华,赵春莲,等.火力发电厂空冷平台研究现状及展望[J].哈尔滨工业大学学报,2007,39(Sup.2):538-542(Bai Guoliang,Zhu Lihua,Zhao Chunlian,et al.Present state and prospect of the air cooled condenser platform in thermal power plants[J].Journal of Harbin Institute of Technology,2007,39(Sup.2):538-542(in Chinese))
[4]Chen Y Q,Soong T T.State of the art review:seismic response of secondary systems[J].Engineering Structure,1988,10(4):218-228
[5]李杰,陈淮,赵晓.结构-设备动力相互作用研究综述[J].世界地震工程,1994,10(2):5-12(Li Jie,Chen Huai,Zhao Xiao.Review of research on dynamic interaction between structure and equipment[J].World Earthquake Engineering,1994,10(2):5-12(in Chinese))
[6]JGJ101—96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1996(Specification of testing methods for earthquake resistant building[S].Beijing:China Architecture and Building Press,1996(in Chinese))
[7]邱法维,钱稼茹,陈志鹏.结构抗震实验方法[M].北京:科学出版社,2000
[8]钱稼茹,赵作周,段安,等.CNP1000核电厂安全壳1∶10模型拟动力试验[J].土木工程学报,2007,40(6):7-13(Qian Jiaru,Zhao Zuozhou,Duan An,et al.Pseudo-dynamic tests of a1∶10model of pre-stressed concrete containment vessel for CNP1000nuclear power plant[J].China Civil Engineering Journal,2007,40(6):7-13(in Chinese))
[9]薛伟辰,程斌,李杰.双层双跨高性能混凝土框架抗震性能研究[J].土木工程学报,2004,37(3):58-65(Xue Weichen,Cheng Bin,Li Jie.Studies on seismic performance of double-story and double-span HPC frames[J].China Civil Engineering Journal,2004,37(3):58-65(in Chinese))
10]GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001(GB50011—2001Code for seismic design of buildings[S].Beijing:China Architecture and Building Press,2001(in Chinese))
11]爱德华L.威尔逊.结构静力与动力分析—强调地震工程学的物理方法[M].北京:中国建筑工业出版社,2006(Edward L Wilson.Static and dynamic analysis of structures[M].Beijing:China Architecture and Building Press(in Chinese))
12]杨溥,李英民,赖明.结构时程分析法输入地震波的选择控制指标[J].土木工程学报,2000,33(6):33-37(Yang Pu,Li Yingmin,Lai Ming.A new method for selecting inputting waves for time-history analysis.[J].China Civil Engineering Journal,2000,33(6):33-37(in Chinese))
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