带斜撑的空冷钢-混凝土混合结构滞回性能试验研究与分析
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摘要
对于高烈度区1000 MW机组火电厂,传统钢-混凝土混合结构空冷支架已经不能满足使用要求。在地震作用下,结构的悬挑端位移超限、局部杆件受力过大、结构整体侧移较大。对此,提出了加设斜撑的空冷钢-混凝土混合结构体系,并按1/8缩尺比例进行了该类结构的拟动力试验和拟静力试验。根据试验结果研究了模型结构在EL-Centro(N-S)地震波作用下的滞回性能、延性性能、刚度退化和耗能能力。试验结果表明:与传统钢-混凝土混合结构空冷支架相比,加设斜撑后,结构的耗能能力有较大的提高,刚度退化速度减慢,而且残余刚度较大,具有了更大的安全储备。研究为同类结构的抗震设计提供了试验依据,并能指导相关工程设计。
The traditional steel-concrete hybrid air-cooling structure can hardly satisfy the requirements of the 1000 MW thermal power plants in high seismic regions. The displacement of the cantilever end of the structure is beyond the limit value, local force is too large, and the overall lateral displacement is also big under a seismic action. Thus, a steel-concrete hybrid air-cooling structure with steel braces was proposed. Pseudo-dynamic and pseudo-static tests were conducted for a 1/8 scaled model structure. Its hysteretic behavior, ductility, stiffness degradation and energy dissipation capacity were studied when the model structure was under EL-Centro(N-S) horizontal earthquake motion. The test results show that the structure with steel braces will have better energy dissipation capability, slower stiffness degradation speed, bigger residual stiffness and more safety stock, compared with the traditional steel-concrete hybrid structure. The research results can provide an experimental basis for the aseismic design of similar structures, and a guide for relevant engineering design.
The traditional steel-concrete hybrid air-cooling structure can hardly satisfy the requirements of the 1000 MW thermal power plants in high seismic regions. The displacement of the cantilever end of the structure is beyond the limit value, local force is too large, and the overall lateral displacement is also big under a seismic action. Thus, a steel-concrete hybrid air-cooling structure with steel braces was proposed. Pseudo-dynamic and pseudo-static tests were conducted for a 1/8 scaled model structure. Its hysteretic behavior, ductility, stiffness degradation and energy dissipation capacity were studied when the model structure was under EL-Centro(N-S) horizontal earthquake motion. The test results show that the structure with steel braces will have better energy dissipation capability, slower stiffness degradation speed, bigger residual stiffness and more safety stock, compared with the traditional steel-concrete hybrid structure. The research results can provide an experimental basis for the aseismic design of similar structures, and a guide for relevant engineering design.
引文
[1]白国良,李红星,白涌滔,等.火电厂RC分散剪力墙-SRC框排架滞回性能试验研究与分析[J].土木工程学报,2011,44(8):59―65.Bai Guoliang,Li Hongxing,Bai Yongtao,et al.Experimental study and analysis of the hysteretic behavior of the RC scattered hear wall-SRC frame-bent structures for thermal power plant[J].China Civil Engineering Journal,2011,44(8):59―65.(in Chinese)
[2]姚谦峰.土木工程结构试验[M].北京:中国建筑工业出版社,2008:216―223.Yao Qianfeng.Civil engineering experiment[M].Beijing:China Architecture Industry Press,2008:216―223.(in Chinese)
[3]李红星,赵春莲,唐六九,等.高烈度区1000 MW空冷机组结构体系研究与设计实践[J].武汉大学学报(工学版),2011,44(增刊):95―98.Li Hongxing,Zhao Chunlian,Tang Liujiu,et al.Research and design of 1000 MW air-cooled generating set structural system in highly seismic zone[J].Engineering Journal of Wuhan University,2011,44(Suppl):95―98.(in Chinese)
[4]朱丽华,白国良,赵更歧.基于主子系统耦合效应的直接空冷结构体系振动特性研究[J].工程力学,2011,28(10):216―221.Zhu Lihua,Bai Guoliang,Zhao Gengqi.Study on vibration behavior of direct air cooled condenser support platform based on primary-secondary system coupling effect[J].Engineering Mechanics,2011,28(10):216―221.(in Chinese)
[5]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―281.
[6]Gu H F,Qiu F Q,Wang H J.Structure optimization of an air-cooling system platform at a large power plant[J].Heat Transfer Engineering,2011,32(11):1069―1074.
[7]赵春莲,焦江伟,李红星,等.高烈度区1000 MW机组带支撑空冷支架结构体系研究[J].武汉大学学报(工学版),2010,43(增刊):25―27.Zhao Chunlian,Jiao Jiangwei,Li Hongxing,et al.Research on1000 MW air-cooled power unit steel braces structure system in highly seismic density zone[J].Engineering Journal of Wuhan University,2010,43(Suppl):25―27.(in Chinese)
[8]代慧娟,刘林,赵立涛,等.新型空冷支架结构体系抗震性能的理论分析[J].世界地震工程,2012,28(3):108―113.Dai Huijuan,Liu Lin,Zhao Litao,et al.Theoretical analysis of seismic performance of new-type air-cooled condenser supporting structure system[J].World Earthquake Engineering,2012,28(3):108―113.(in Chinese)
[9]代慧娟,白国良,王博,等.钢斜撑+钢桁架+钢筋混凝土管柱竖向混合结构抗震性能试验研究[J].工程力学,2014,31(7):61―68.Dai Huijuan,Bai Guoliang,Wang Bo,et al.Experimental study on aseismic performance of vertical hybrid structure with steel slant support-steel truss-reinforced concrete columns[J].Engineering Mechanics,2014,31(7):61―68.(in Chinese)
[10]刘林,贾瑞涛,白国良,等.1000 MW超超临界机组空冷支架结构设计选型研究[J].钢结构,2014,29(189):25―30.Liu Lin,Jia Ruitao,Bai Guoliang,et al.Study on design selection of ACC structure in 1000 MW thermal power plant in high intensity seismic region[J].Steel Construction,2014,29(189):25―30.(in Chinese)
[11]刘林,白国良,薛群虎,等.大容量机组空冷支架结构抗震设计方法研究[J].工业建筑,2014,44(6):57―61.Liu Lin,Bai Guoliang,Xue Qunhu,et al.Study of the seismic design method of air cooled condenser support structure system in high-capacity thermal power plant[J].Industrial Construction,2014,44(6):57―61.(in Chinese)
[12]代慧娟,白国良,王博,等.带斜撑直接空冷钢-混凝土竖向混合结构非线性地震响应分析[J].振动与冲击,2015,34(7):141―148.Dai Huijuan,Bai Guoliang,Wang Bo,et al.Nonlinear seismic response analysis of direct air-cooled vertical hybrid structures with diagonal bracing[J].Journal of Vibration Action and Shock,2015,34(7):141―148.(in Chinese)
[13]代慧娟,白国良,王博,等.考虑设备使用安全性的空冷支架结构体系基于位移的抗震设计方法研究[J].工业建筑,2015,45(2):125―130.Dai Huijuan,Bai Guoliang,Wang Bo,et al.Study of displacement-based design method of air-cooled condenser structure considering equipment safety[J].Industrial Construction,2015,45(2):125―130.(in Chinese)
[14]Xu Yazhou,Bai Guoliang,Zhu Jianing,et al.Pseudo dynamic test and numerical simulation of a large direct air-cooling structure[J].Structural Design of Tall and Special Building,2015,24(5):280―299.
[15]Gu Hongfang,Wang Haijun,Gu Yuqian,Yao Jianan,et al.A numerical study on the mechanism and optimization of wind-break structures for indirect air-cooling towers[J].Energy Conversion and Management,2016,108(15):43―49.
[16]白国良.空冷支架结构体系优化与创新研究报告[R].西安:西安建筑科技大学土木工程学院,2012.Bai Guoliang.Research report on the optimization and innovation of air-cooling structure[R].Xi’an:Xi’an University of Architecture and Technology,Department of Civil Engineering,2012.(in Chinese)
[17]郑山锁.动力试验模型在任意配重条件下与原型结构的相似关系[J].工业建筑,2000,30(3):35―39.Zheng Shansuo.Analogical ratio between scale models with less ballast and their prototypes under shaking table test[J].Industrial Construction,2000,30(3):35―39.(in Chinese)
[18]GB50011-2010,建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB50011-2010,Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[19]JGJ101-1996,建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.JGJ101-1996,Specification of test methods for earthquake resistant building[S].Beijing:China Architecture&Building Press,1997.(in Chinese)
[20]李红星.大型火力发电厂空冷支架结构体系抗震性能试验研究[D].西安:西安建筑科技大学,2006.Li Hongxing.Study on the support structure system for air-cooled condenser of big power plant[D].Xi’an:Xi’an University of Architecture&Technology,2006.(in Chinese)
[21]白国良,朱丽华,赵春莲,李红星,李晓文.工作荷载与地震作用下直接空冷结构体系模型试验研究[J].建筑结构学报,2008,29(5):42―49.Bai Guoliang,Zhu Lihua,Zhao Chunlian,Li Hongxing,Li Xiaowen.Model test on behavior of direct air cooled condenser support platform under service load and earthquake action[J].Journal of Building Structures,2008,29(5):42―49.(in Chinese)
[2]姚谦峰.土木工程结构试验[M].北京:中国建筑工业出版社,2008:216―223.Yao Qianfeng.Civil engineering experiment[M].Beijing:China Architecture Industry Press,2008:216―223.(in Chinese)
[3]李红星,赵春莲,唐六九,等.高烈度区1000 MW空冷机组结构体系研究与设计实践[J].武汉大学学报(工学版),2011,44(增刊):95―98.Li Hongxing,Zhao Chunlian,Tang Liujiu,et al.Research and design of 1000 MW air-cooled generating set structural system in highly seismic zone[J].Engineering Journal of Wuhan University,2011,44(Suppl):95―98.(in Chinese)
[4]朱丽华,白国良,赵更歧.基于主子系统耦合效应的直接空冷结构体系振动特性研究[J].工程力学,2011,28(10):216―221.Zhu Lihua,Bai Guoliang,Zhao Gengqi.Study on vibration behavior of direct air cooled condenser support platform based on primary-secondary system coupling effect[J].Engineering Mechanics,2011,28(10):216―221.(in Chinese)
[5]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―281.
[6]Gu H F,Qiu F Q,Wang H J.Structure optimization of an air-cooling system platform at a large power plant[J].Heat Transfer Engineering,2011,32(11):1069―1074.
[7]赵春莲,焦江伟,李红星,等.高烈度区1000 MW机组带支撑空冷支架结构体系研究[J].武汉大学学报(工学版),2010,43(增刊):25―27.Zhao Chunlian,Jiao Jiangwei,Li Hongxing,et al.Research on1000 MW air-cooled power unit steel braces structure system in highly seismic density zone[J].Engineering Journal of Wuhan University,2010,43(Suppl):25―27.(in Chinese)
[8]代慧娟,刘林,赵立涛,等.新型空冷支架结构体系抗震性能的理论分析[J].世界地震工程,2012,28(3):108―113.Dai Huijuan,Liu Lin,Zhao Litao,et al.Theoretical analysis of seismic performance of new-type air-cooled condenser supporting structure system[J].World Earthquake Engineering,2012,28(3):108―113.(in Chinese)
[9]代慧娟,白国良,王博,等.钢斜撑+钢桁架+钢筋混凝土管柱竖向混合结构抗震性能试验研究[J].工程力学,2014,31(7):61―68.Dai Huijuan,Bai Guoliang,Wang Bo,et al.Experimental study on aseismic performance of vertical hybrid structure with steel slant support-steel truss-reinforced concrete columns[J].Engineering Mechanics,2014,31(7):61―68.(in Chinese)
[10]刘林,贾瑞涛,白国良,等.1000 MW超超临界机组空冷支架结构设计选型研究[J].钢结构,2014,29(189):25―30.Liu Lin,Jia Ruitao,Bai Guoliang,et al.Study on design selection of ACC structure in 1000 MW thermal power plant in high intensity seismic region[J].Steel Construction,2014,29(189):25―30.(in Chinese)
[11]刘林,白国良,薛群虎,等.大容量机组空冷支架结构抗震设计方法研究[J].工业建筑,2014,44(6):57―61.Liu Lin,Bai Guoliang,Xue Qunhu,et al.Study of the seismic design method of air cooled condenser support structure system in high-capacity thermal power plant[J].Industrial Construction,2014,44(6):57―61.(in Chinese)
[12]代慧娟,白国良,王博,等.带斜撑直接空冷钢-混凝土竖向混合结构非线性地震响应分析[J].振动与冲击,2015,34(7):141―148.Dai Huijuan,Bai Guoliang,Wang Bo,et al.Nonlinear seismic response analysis of direct air-cooled vertical hybrid structures with diagonal bracing[J].Journal of Vibration Action and Shock,2015,34(7):141―148.(in Chinese)
[13]代慧娟,白国良,王博,等.考虑设备使用安全性的空冷支架结构体系基于位移的抗震设计方法研究[J].工业建筑,2015,45(2):125―130.Dai Huijuan,Bai Guoliang,Wang Bo,et al.Study of displacement-based design method of air-cooled condenser structure considering equipment safety[J].Industrial Construction,2015,45(2):125―130.(in Chinese)
[14]Xu Yazhou,Bai Guoliang,Zhu Jianing,et al.Pseudo dynamic test and numerical simulation of a large direct air-cooling structure[J].Structural Design of Tall and Special Building,2015,24(5):280―299.
[15]Gu Hongfang,Wang Haijun,Gu Yuqian,Yao Jianan,et al.A numerical study on the mechanism and optimization of wind-break structures for indirect air-cooling towers[J].Energy Conversion and Management,2016,108(15):43―49.
[16]白国良.空冷支架结构体系优化与创新研究报告[R].西安:西安建筑科技大学土木工程学院,2012.Bai Guoliang.Research report on the optimization and innovation of air-cooling structure[R].Xi’an:Xi’an University of Architecture and Technology,Department of Civil Engineering,2012.(in Chinese)
[17]郑山锁.动力试验模型在任意配重条件下与原型结构的相似关系[J].工业建筑,2000,30(3):35―39.Zheng Shansuo.Analogical ratio between scale models with less ballast and their prototypes under shaking table test[J].Industrial Construction,2000,30(3):35―39.(in Chinese)
[18]GB50011-2010,建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB50011-2010,Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[19]JGJ101-1996,建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.JGJ101-1996,Specification of test methods for earthquake resistant building[S].Beijing:China Architecture&Building Press,1997.(in Chinese)
[20]李红星.大型火力发电厂空冷支架结构体系抗震性能试验研究[D].西安:西安建筑科技大学,2006.Li Hongxing.Study on the support structure system for air-cooled condenser of big power plant[D].Xi’an:Xi’an University of Architecture&Technology,2006.(in Chinese)
[21]白国良,朱丽华,赵春莲,李红星,李晓文.工作荷载与地震作用下直接空冷结构体系模型试验研究[J].建筑结构学报,2008,29(5):42―49.Bai Guoliang,Zhu Lihua,Zhao Chunlian,Li Hongxing,Li Xiaowen.Model test on behavior of direct air cooled condenser support platform under service load and earthquake action[J].Journal of Building Structures,2008,29(5):42―49.(in Chinese)