大跨度输煤钢结构栈桥模态及竖向地震响应
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摘要
随着现代工艺的不断改进及局部场地的限制,钢结构栈桥的跨度、桥面宽度不断的增加,但相关钢结构栈桥的研究较少。钢结构栈桥连接着转运站和主厂房,起着供给原料的作用,一旦出现问题就有会导致整个工作系统瘫痪,所以对于钢结构栈桥的安全性设计就显的尤为重要。为了研究大跨度输煤钢结构栈桥的动力特性和抗震性能,利用SAP2000建立输煤栈桥模型,对其进行模态及竖向地震响应分析。结果表明:钢结构栈桥体系模态振型密集,竖向地震作用对于7度设防烈度Ⅱ类场地的钢结构栈桥节点位移和杆件内力影响极大。研究结果对此类结构的动力性能评估和抗震设计研究具有重要的实际指导意义。
In recent years,with the development of the process continuously,and the limitation of local site,make steel structure bridge span and bridge deck width increase unceasingly,but less study of bridge steel structure. Steel structure rack connects the transfer station and main plant to play the role of a supply of raw materials,once problem appear likely paralyzed the whole chain,so the safety design of steel structure rack is important. A model is established by SAP2000 software to study the dynamic characteristics and seismic behavior of the long-span steel structure coal-conveyer-gallery. This paper makes modal analysis and the vertical seismic response analysis of the coal-conveyer-gallery. The conclusion shows that the vibration mode of steel structure gallery is dense and vertical earthquake action has a large influence on the deformation and stress of this gallery in Intensity Region 7( site of category Ⅱ),which is of important practical reference for dynamic performance evaluation and seismic design of the long-span steel structure coal-conveyer-gallery.
In recent years,with the development of the process continuously,and the limitation of local site,make steel structure bridge span and bridge deck width increase unceasingly,but less study of bridge steel structure. Steel structure rack connects the transfer station and main plant to play the role of a supply of raw materials,once problem appear likely paralyzed the whole chain,so the safety design of steel structure rack is important. A model is established by SAP2000 software to study the dynamic characteristics and seismic behavior of the long-span steel structure coal-conveyer-gallery. This paper makes modal analysis and the vertical seismic response analysis of the coal-conveyer-gallery. The conclusion shows that the vibration mode of steel structure gallery is dense and vertical earthquake action has a large influence on the deformation and stress of this gallery in Intensity Region 7( site of category Ⅱ),which is of important practical reference for dynamic performance evaluation and seismic design of the long-span steel structure coal-conveyer-gallery.
引文
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[3]汤卫华,瞿岳前,王学民.附属栈桥通廊抗震性能分析[J].山西建筑,2009,35(36):69-70.TANG Wei-hua,QU Yue-qian,WANG Xue-min.The aseismic property analysis of subsidiary trestle gallery[J].Shanxi Architecture,2009,35(36):69-70.
[4]胡瑞星.输煤栈桥钢桁架的动力特性分析及振动控制研究[D].西安:西安建筑科技大学,2012.HU Rui-xing.Dynamic analysis and research on vibration control of coal-conveyer gallery steel truss[D].Xi’an:Xi’an University of Architecture and Technology,2012.
[5]张洪涛,王伟,李海旺,等.长平煤矿钢结构输煤栈桥动力检测及模态分析[C]//第九届全国现代结构工程学术研讨会,2009.ZHANG Hong-Tao,WANG Wei,LI Hai-wang,et al.Changping coal mine steel structure bridge dynamic test and modal analysis[C]//The 9th National Conference on Modern Structural Engineering,2009.
[6]金联社,张欲晓,秦素娟.超大跨度输煤栈桥的竖向地震及温度计算[J].武汉大学学报,2010(43):128-131.JIN Lian-she,ZHANG Yu-xiao,QIN Su-juan.Vertical seism and temperature calculation of super-large span coal handling trestle[J].Engineering Journal of Wuhan University,2010(43):128-131.
[7]蔡红新,秦冬琪,李海旺.某栈桥动载试验和数值模拟分析[J].钢结构,2010,25(5):12-16.CAI Hong-xin,QIN Dong-qi,LI Hai-wang.Dynamic load tests and numerical simulation analysis of a trestle[J].Steel Construction,2010,25(5):12-16.
[8]中华人民共和国冶金工业部.GB50191-93,构筑物抗震设计规范[S].北京:中国计划出版社,1994.The Ministry of Metallurgical Industry of the People’s Repulilic of China.GB50191-93,Code for seismic design of special strucc tures[S].Beijing:China Plan Publi-shing House,1994.
[9]中华人民共和国电力工业部.GB50260-96,电力设施抗震设计规范[S].北京:中国计划出版社,1997.Electric Pouer Industry Ministry of the People’s Repulilic of China.GB50260-96,Code for design of seismic of electrical installations[S].Beijing:China Plan Publishing House,1997.
[10]中华人民共和国建设部.GB50011-2010,建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.The Ministry of Construction of the People’s Repulilic of China.GB50011-2010,Code for seismic design of buildings[S].Beijing:China Building Industry Publishing House,2010.
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