型钢混凝土闸墩的地震谱分析
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摘要
为了研究型钢混凝土闸墩的地震反应,以邕宁水利枢纽型钢混凝土闸墩为基础模型,借助ANSYS软件,采用水工抗震规范中的主流地震谱分析方法,获取用于水闸地震响应求解的设计反应谱,使用振型分解法求解型钢混凝土闸墩的地震响应.结果表明:型钢混凝土闸墩自由振动的主要形态是墩体横水流方向的左右平动,基本周期约为0.7 s;型钢混凝土闸墩的自振频率间隔较大,频率自小向大的排列属于稀疏型频率谱;地震引起的型钢混凝土闸墩变形不大,但是局部应力偏大会导致闸墩开裂,这与水利工程震害调查中闸墩常见的开裂破坏较为吻合.
In order to study the seismic response of steel reinforced concrete pier, this paper takes the steel concrete pier of the Yongning Water Conservancy Project as a basic model, with the help of the ANSYS software and using the mainstream seismic spectrum analysis method in hydraulic seismic codes to get the design response spectrum for the sluice seismic response solution; and then using the vibration mode decomposition method to solve the seismic response of the steel concrete pier.The results show that the main form of free vibration of the steel concrete pier is the left and right translation of the lateral flow direction of the pier;and the basic period is about 0.7 s;the free vibration frequency spacing of steel-reinforced concrete pier is large, and the frequency from small to large is a sparse frequency spectrum; the deformation of the steelreinforced concrete pier caused by the earthquake is not large,but the partial stress tends to cause cracking of the pier, which is consistent with the common cracking damage of the pier in the seismic damage investigation of hydraulic engineering.
In order to study the seismic response of steel reinforced concrete pier, this paper takes the steel concrete pier of the Yongning Water Conservancy Project as a basic model, with the help of the ANSYS software and using the mainstream seismic spectrum analysis method in hydraulic seismic codes to get the design response spectrum for the sluice seismic response solution; and then using the vibration mode decomposition method to solve the seismic response of the steel concrete pier.The results show that the main form of free vibration of the steel concrete pier is the left and right translation of the lateral flow direction of the pier;and the basic period is about 0.7 s;the free vibration frequency spacing of steel-reinforced concrete pier is large, and the frequency from small to large is a sparse frequency spectrum; the deformation of the steelreinforced concrete pier caused by the earthquake is not large,but the partial stress tends to cause cracking of the pier, which is consistent with the common cracking damage of the pier in the seismic damage investigation of hydraulic engineering.
引文
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[15]樊彦君.涵洞式水闸动力响应分析[D].郑州:华北水利水电大学,2016:23-62.Fan Yanjun.Dynamic response analysis of culvert sluice[D].Zhengzhou:North China University of Water Resources and Electric Power,2016:23-62.
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[17]李正农,孟吉复.多槽体渡槽的自振特性分析[J].武汉大学学报(工学版),2001,34(4):11-16.Li Zhengnong,Meng Jifu.Analysis of natural vibration characteristics of multi-tank aqueduct[J].Engineering Journal of Wuhan University,2001,34(4):11-16.
[18]中国水利水电规划设计总院.NB 35047-2015水电工程水工建筑物抗震设计规范[S].北京:中国电力出版社,2015:16-17.China Water Resources and Hydropower Planning and Design Institute.NB 35047-2015 Seismic Design Specification for Hydraulic Structures of Hydropower Projects[S].Beijing:China Electricpower Press,2015:16-17.
[2]陈宗平,张喜德,赵鸿铁.桁架式型钢混凝土异形柱正截面承力的试验研究[J].西安建筑科技大学学报,2006,38(1):109-114.Chen Zongping,Zhang Xide,Zhao Hongtie.Experimental study on normal section bearing capacity of trussed steel reinforced concrete special-shaped columns[J].Journal of Xi'an University of Architecture and Technology,2006,38(1):109-114.
[3]Wu Yi,Yang Chun,Cai Jian,et al.Study on mechanical behaviors of box steel reinforced concrete beam using finite element method[J].Journal of Harbin Institute of Technology,2007,39(8):300-303.
[4]Mu Xuantao,Fan Jiansheng,Nie Jianguo.Seismic behavior of steel reinforced concrete column-steel truss beam hybrid joints[J].Engineering Structures,2013,56:1557-1569.
[5]Li J H,Qu D L,Yu K,et al.Bond-slip behavior between shaped steel and concrete in SRC structures at elevated temperature[J].Journal of Basic Science&Engineering,2015,23(5):914-931.
[6]Thanyawat Pothisiri,Pattamad Panedpojaman.Modeling of mechanical bond-slip for steel-reinforced concrete under thermal loads[J].Engineering Structures,2013,48:497-507.
[7]Chen Chengchih,Lin Nanjiao.Analytcal model for predicting axial capacity and behavior of concrete encased steel composite stub columns[J].Journal of Constructional Steel Research,2005,62(5):424-433.
[8]Mark D Denavit,Jerome F Hajjar,Roberto T Leon.Seismic behavior of steel reinforced concrete beamcolumns and frames[C]//Structures Congress 2011-Las Vegas,Nevada,SEI of ASCE,2011:2852-2861.
[9]雷健.型钢混凝土框架结构基于位移的抗震设计理论和方法[D].西安:西安建筑科技大学,2008:11-12.Lei Jian.Displacement-based seismic design theory and method for steel reinforced concrete frame structures[D].Xi'an:Xi'an University of Architecture and Technology,2008:11-12.
[10]胡瑞昌.型钢布置形式对型钢混凝土闸墩工作性能的影响研究[D].南宁:广西大学,2016:18-82.Hu Ruichang.Study on the effect of steel structure on the performance of steel reinforced concrete piers[D].Nanning:Guangxi University,2016:18-82.
[11]SL 191-2008水工混凝土结构设计规范[S].北京:中国水利水电出版社,2015:152-156.SL 191-2008 Standards for Design of Hydraulic Concrete Structures in the Water Conservancy Industry[S].Beijing:China Water Conservancy and Hydropower Press,2015:152-156.
[12]袁春.型钢截面形式对型钢混凝土闸墩承载能力的影响研究[D].南宁:广西大学,2014:28-85.Yuan Chun.Study on the effect of steel section form on the bearing capacity of steel reinforced concrete piers[D].Nanning:Guangxi University,2014:28-85.
[13]关淑萍.基于ANSYS的水闸动力特性及内力分析方法研究[D].南京:河海大学,2006:9-79.Guan Shuping.Research on dynamic characteristics and internal force analysis method of sluice based on AN-SYS[D].Nanjing:Hohai University,2006:9-79.
[14]王雪奎.黄河中下游水闸抗震能力分析[D].郑州:华北水利水电大学,2016:33-65.Wang Xuekui.Analysis of seismic capacity of sluices in the middle and lower reaches of the Yellow River[D].Zhengzhou:North China University of Water Resources and Electric Power,2016:33-65.
[15]樊彦君.涵洞式水闸动力响应分析[D].郑州:华北水利水电大学,2016:23-62.Fan Yanjun.Dynamic response analysis of culvert sluice[D].Zhengzhou:North China University of Water Resources and Electric Power,2016:23-62.
[16]刘烈坤,傅少君,田波.小湾拱坝放空底孔预应力闸墩三维有限元分析[J].武汉大学学报(工学版),2009,42(3):340-342.Liu Liekun,Fu Shaojun,Tian Bo.Three-dimensional finite element analysis of prestressed piers for the bottom hole of Xiaowan arch dam[J].Engineering Journal of Wuhan University,2009,42(3):340-342
[17]李正农,孟吉复.多槽体渡槽的自振特性分析[J].武汉大学学报(工学版),2001,34(4):11-16.Li Zhengnong,Meng Jifu.Analysis of natural vibration characteristics of multi-tank aqueduct[J].Engineering Journal of Wuhan University,2001,34(4):11-16.
[18]中国水利水电规划设计总院.NB 35047-2015水电工程水工建筑物抗震设计规范[S].北京:中国电力出版社,2015:16-17.China Water Resources and Hydropower Planning and Design Institute.NB 35047-2015 Seismic Design Specification for Hydraulic Structures of Hydropower Projects[S].Beijing:China Electricpower Press,2015:16-17.