防屈曲支撑在选煤厂房中的减震控制
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摘要
目的为了分析防屈曲支撑对选煤厂房结构竖向刚度、动力特性的影响,并通过合理布置防屈曲支撑以减小多遇和罕遇地震下的地震响应.方法运用有限元软件SAP2000建立8度区Ⅱ类场地重介质选煤厂房耗能支撑计算模型,计算了防屈曲支撑在若干布置方案下结构的模态分析及地震响应.结果对于此类平面与竖向均不规则的钢框架结构,合理地布置防屈曲支撑可以增强结构抗侧刚度并有效降低结构平扭藕联程度;能够减小此类钢框架在小震下各楼层最大水平位移,大震下能够降低各楼层最大水平位移、层间位移,并能够显著降低结构顶点的加速度反应.结论通过合理地布置防屈曲支撑可以改善结构竖向刚度不均匀,从而使其动力特性规则化并能减小多遇和罕遇地震下的地震响应.
The purpose of this paper is to analyse the effect of the bucking-restrained brace on the vertical stiffness and dynamic property of the main buildings of coal preparation,and to reduce seismic response in the frequently occurred and seldom occurred earthquake by arranging bucking-restrained brace reasonably.Finite element analysis software SAP2000 is used to establish the calculation model of bucking-restrained brace in the slime separation technology by using heavy media cyclone of steel structure of coal preparation plant at seismic fortification intensity 8,site Ⅱarea,and to calculate the model analysis and seismic response of structure as the bucking-restrained brace in several kinds of plans.The results indicate that reasonable arrangement on the anti-buckling support can enhance the lateral-resistance stiffness of the structure and effectively reduce coupling of translational and torsional vibration of the structure,for such an irregular steel frame structure;it can reduce the maximum horizontal displacement of each floor of the steel frame in a small earthquake;besides,it can also reduce the maximum horizontal displacement of each floor and the displacement between floors in a big earthquake as well as significantly reduce the acceleration response of the vertex of the structure.The conclusion is that the bucking-restrained brace can effectively improve the irregularity of vertical stiffness for the structure,which can make its dynamic properties regular and reduce the seismic response under frequently occurred and seldom occurred earthquake.
The purpose of this paper is to analyse the effect of the bucking-restrained brace on the vertical stiffness and dynamic property of the main buildings of coal preparation,and to reduce seismic response in the frequently occurred and seldom occurred earthquake by arranging bucking-restrained brace reasonably.Finite element analysis software SAP2000 is used to establish the calculation model of bucking-restrained brace in the slime separation technology by using heavy media cyclone of steel structure of coal preparation plant at seismic fortification intensity 8,site Ⅱarea,and to calculate the model analysis and seismic response of structure as the bucking-restrained brace in several kinds of plans.The results indicate that reasonable arrangement on the anti-buckling support can enhance the lateral-resistance stiffness of the structure and effectively reduce coupling of translational and torsional vibration of the structure,for such an irregular steel frame structure;it can reduce the maximum horizontal displacement of each floor of the steel frame in a small earthquake;besides,it can also reduce the maximum horizontal displacement of each floor and the displacement between floors in a big earthquake as well as significantly reduce the acceleration response of the vertex of the structure.The conclusion is that the bucking-restrained brace can effectively improve the irregularity of vertical stiffness for the structure,which can make its dynamic properties regular and reduce the seismic response under frequently occurred and seldom occurred earthquake.
引文
[1]魏春梅,李丁.选煤厂建筑结构的现状分析[J].煤炭工程,2007(12):29-30.(Wei Chunmei,Li Ding.The present situation of thecoal building structure analysis[J].Coal Engineer-ing,2007(12):29-30.)
[2]中华人民共和国住房和城乡建设部.GB50583-2010选煤厂建筑结构设计规范[S].北京:中国计划出版社,2010.(Ministry of Housing and Urban-Rural Developmentof the People's Republic of China.50583-2010Code for design of building and structure of coalmine of preparation plant[S].Beijing:China Plan-ning Press,2001.)
[3]李国强,孙飞飞.新型屈曲约束支撑研制及其应用研究[C].第三届结构工程新进展国际论坛文集,北京:中国建筑工业出版社,2009:314-345.(Li Guoqiang,Sun Feifei.Development and applica-tion of New-type buckling-restrained braces[C].The3rd international Forum on Advances in StructuralEngineering,Beijing:China Architecture&BuildingPress,2009:314-345.)
[4]Takesue N,Furusho J.Fast response MR-fluid actua-tor[J].JSME International Journal,2004,47(3):783-791.
[5]Xie Q.State-of-the-art of buckling-restrained bracesin Asia[J].Journal of Constructional Steel Re-search,2005,61(6):727-748.
[6]Inoue K,Saw aizumi S.Stiffening requirements forunbond braces encased in concrete panels[J].Jour-nal of Structural Engineering,2001,127(6):712-719.
[7]Higgins C,Newell J.Confined steel brace for earth-quake resistant design[J].Engineering Journal,AISC,2004,41(4):187-202.
[8]Iwata M,Kato T.Buckling retrained braces as hyster-etic dampers[J].Proceedings,STESSA,Quebec,Canada,2000,33-38.
[9]Iwata M,Murai M.Buckling-restrained brace usingsteel mortar planks:performance evaluation as a hys-teretic damper[J].Earthquake Engineering andStructural Dynamics,2006,35:1807-1826.
[10]Sabelli R,Mahin S A.Seismic demands on steelbraced-frame buildings w ith buckling-restrainedbraces[J].Engineering Structures,2003,25:655-666.
[11]Kiggins S,Uang C M.Reducing residual drift ofbuckling-restrained braced frames as a dual system[J].Engineering Structures,2006,28:1525-1532.
[12]孟文清,张媛媛.防屈曲支撑在偏心钢框架中的减震控制研究[J].湘潭大学自然科学学报,2011,33(1):34-38.(Meng Wenqing,Zhang Yuanyuan.Study on seismicresponse control of eccentric steel frame w ith buck-ling-restrained Brace[J].Natural Science Journal ofXiangtan University,2011,33(1):34-38.)
[13]谢强,赵亮.带有屈曲约束支撑双重结构体系的抗震性能[J].沈阳建筑大学学报:自然科学版,2008,24(2):221-225.(Xie Qiang,Zhao Liang.Seismic behavior of dualsystem w ith buckling-restrained brace[J].Journal ofShenyang Jianzhu University:Natural Science,2008,24(2):221-225.)
[14]熊俊,王元清.含偏心支撑小高层钢框架结构的抗震性能[J].沈阳建筑大学学报:自然科学版,2010,26(1):7-12.(Xiong Jun,Wang Yuanqing.Seismic of eccentrical-ly braced multi-storey steel frame[J].Journal ofShenyang Jianzhu University:Natural Science,2010,26(1):7-12.)
[15]彭俊生,罗永坤.结构动力学、抗震计算与SAP2000应用[M].成都:西南交通大学出版社,2006.(Peng Junsheng,Luo Yongkun.Structural dynamics,seismic calculation and application of SAP2000[M].Chengdu:Southwest Jiaotong UniversityPress,2006.)
[16]周云.防屈曲耗能支撑结构设计与应用[M].北京:中国建筑工业出版社,2007.(Zhou Yun.Structure design and application withbuckling-restrained brace[M].Beijing:China Archi-tecture&Building Press,2007.)
[17]中华人民共和国住房和城乡建设部.GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.(Ministry of Housing and Urban-Rural Developmentof the People's Republic of China.GB50011-2010Code for seismic design of buildings[S].Beijing:China Building Industry Press,2010.)
[18]扶长生.抗震设计中的平扭藕联问题[J].建筑结构学报,2006,27(2):40-46.(Fu Changsheng.Seismic design of tortionally cou-pled buildings[J].Journal of Building Structures,2006,27(2):40-46.)
[2]中华人民共和国住房和城乡建设部.GB50583-2010选煤厂建筑结构设计规范[S].北京:中国计划出版社,2010.(Ministry of Housing and Urban-Rural Developmentof the People's Republic of China.50583-2010Code for design of building and structure of coalmine of preparation plant[S].Beijing:China Plan-ning Press,2001.)
[3]李国强,孙飞飞.新型屈曲约束支撑研制及其应用研究[C].第三届结构工程新进展国际论坛文集,北京:中国建筑工业出版社,2009:314-345.(Li Guoqiang,Sun Feifei.Development and applica-tion of New-type buckling-restrained braces[C].The3rd international Forum on Advances in StructuralEngineering,Beijing:China Architecture&BuildingPress,2009:314-345.)
[4]Takesue N,Furusho J.Fast response MR-fluid actua-tor[J].JSME International Journal,2004,47(3):783-791.
[5]Xie Q.State-of-the-art of buckling-restrained bracesin Asia[J].Journal of Constructional Steel Re-search,2005,61(6):727-748.
[6]Inoue K,Saw aizumi S.Stiffening requirements forunbond braces encased in concrete panels[J].Jour-nal of Structural Engineering,2001,127(6):712-719.
[7]Higgins C,Newell J.Confined steel brace for earth-quake resistant design[J].Engineering Journal,AISC,2004,41(4):187-202.
[8]Iwata M,Kato T.Buckling retrained braces as hyster-etic dampers[J].Proceedings,STESSA,Quebec,Canada,2000,33-38.
[9]Iwata M,Murai M.Buckling-restrained brace usingsteel mortar planks:performance evaluation as a hys-teretic damper[J].Earthquake Engineering andStructural Dynamics,2006,35:1807-1826.
[10]Sabelli R,Mahin S A.Seismic demands on steelbraced-frame buildings w ith buckling-restrainedbraces[J].Engineering Structures,2003,25:655-666.
[11]Kiggins S,Uang C M.Reducing residual drift ofbuckling-restrained braced frames as a dual system[J].Engineering Structures,2006,28:1525-1532.
[12]孟文清,张媛媛.防屈曲支撑在偏心钢框架中的减震控制研究[J].湘潭大学自然科学学报,2011,33(1):34-38.(Meng Wenqing,Zhang Yuanyuan.Study on seismicresponse control of eccentric steel frame w ith buck-ling-restrained Brace[J].Natural Science Journal ofXiangtan University,2011,33(1):34-38.)
[13]谢强,赵亮.带有屈曲约束支撑双重结构体系的抗震性能[J].沈阳建筑大学学报:自然科学版,2008,24(2):221-225.(Xie Qiang,Zhao Liang.Seismic behavior of dualsystem w ith buckling-restrained brace[J].Journal ofShenyang Jianzhu University:Natural Science,2008,24(2):221-225.)
[14]熊俊,王元清.含偏心支撑小高层钢框架结构的抗震性能[J].沈阳建筑大学学报:自然科学版,2010,26(1):7-12.(Xiong Jun,Wang Yuanqing.Seismic of eccentrical-ly braced multi-storey steel frame[J].Journal ofShenyang Jianzhu University:Natural Science,2010,26(1):7-12.)
[15]彭俊生,罗永坤.结构动力学、抗震计算与SAP2000应用[M].成都:西南交通大学出版社,2006.(Peng Junsheng,Luo Yongkun.Structural dynamics,seismic calculation and application of SAP2000[M].Chengdu:Southwest Jiaotong UniversityPress,2006.)
[16]周云.防屈曲耗能支撑结构设计与应用[M].北京:中国建筑工业出版社,2007.(Zhou Yun.Structure design and application withbuckling-restrained brace[M].Beijing:China Archi-tecture&Building Press,2007.)
[17]中华人民共和国住房和城乡建设部.GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.(Ministry of Housing and Urban-Rural Developmentof the People's Republic of China.GB50011-2010Code for seismic design of buildings[S].Beijing:China Building Industry Press,2010.)
[18]扶长生.抗震设计中的平扭藕联问题[J].建筑结构学报,2006,27(2):40-46.(Fu Changsheng.Seismic design of tortionally cou-pled buildings[J].Journal of Building Structures,2006,27(2):40-46.)
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