型钢混凝土框排架混合结构弹塑性地震响应及抗震防线问题研究
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摘要
型钢混凝土框排架混合结构是一种新型的火电厂主厂房结构体系,合理的剪力墙布置能够使该类结构实现三道抗震防线。采用ABAQUS有限元软件进行8度小震、中震、大震以及9度大震下的弹塑性地震反应分析,获得结构在不同强度地震下的基底剪力、整体侧移、层间侧移角以及结构构件的损伤演化特性。研究结果表明:强震作用下剪力墙首先出现损伤破坏,可以起到第一道抗震防线的作用,有效提高了结构的抗震能力;随着地震作用的增强,结构薄弱部位由煤斗层到运转层再到底部两层下移,且整体侧移曲线由弯剪型向剪切型转变;整体结构的变形性能较好,能够满足"大震不倒"的抗震设防需求。最后,通过计算分析提出适用于不同烈度、不同场地类别下的剪力墙布置数量与抗震构造措施,可供工程设计参考。
SRC( shapes reinforced concrete) frame-bent hybrid structure is a new type of main building system for thermal power plants,and a reasonable arrangement of shear walls can make the structure have three anti-seismic lines.ABAQUS finite element software was used to analyze the elastic-plastic seismic response of the structure under 8 degree minor earthquake,moderate earthquake and major earthquake as well as 9 degree major earthquake,to acquire the base shear,lateral displacement,inter-story drift and damage evolutionary character of the structure under different earthquake intensities. The results showed that the shear wall is damaged firstly under strong earthquake,it forms the first antiseismic line,and this can enhance the earthquake resistance of the structure effectively; as the earthquake intensity increases,the weak part of the structure moves down from coal hopper floor to operation floor and to bottom two stories,and the lateral displacement curve is shifting from shear-moment-type toward shear-type; the deformation performance of the whole structure is well,it can make the structure meet the requirement of no collapse under severe earthquake.Finally,the reasonable arrangement and seismic tectonic measure of shear walls under different earthquake intensities and different site categories were suggested through numerical analysis,they could be referencial to engineering designs.
SRC( shapes reinforced concrete) frame-bent hybrid structure is a new type of main building system for thermal power plants,and a reasonable arrangement of shear walls can make the structure have three anti-seismic lines.ABAQUS finite element software was used to analyze the elastic-plastic seismic response of the structure under 8 degree minor earthquake,moderate earthquake and major earthquake as well as 9 degree major earthquake,to acquire the base shear,lateral displacement,inter-story drift and damage evolutionary character of the structure under different earthquake intensities. The results showed that the shear wall is damaged firstly under strong earthquake,it forms the first antiseismic line,and this can enhance the earthquake resistance of the structure effectively; as the earthquake intensity increases,the weak part of the structure moves down from coal hopper floor to operation floor and to bottom two stories,and the lateral displacement curve is shifting from shear-moment-type toward shear-type; the deformation performance of the whole structure is well,it can make the structure meet the requirement of no collapse under severe earthquake.Finally,the reasonable arrangement and seismic tectonic measure of shear walls under different earthquake intensities and different site categories were suggested through numerical analysis,they could be referencial to engineering designs.
引文
[1]吴涛.大型火力发电厂钢筋混凝土框排架结构抗震性能及设计方法研究[D].西安:西安建筑科技大学,2003.
[2]白国良,林娜,吴涛,等.大型火电厂钢筋混凝土主厂房框排架结构抗震性能试验研究报告[R].西安:西安建筑科技大学土木工程学院资料室,2002.
[3]吴涛,刘伯权,白国良,等.大型火力发电厂钢筋混凝土框架异型边节点抗震性能及设计方法研究[J].建筑结构学报,2005,26(5):17-22.WU Tao,LIU Bo-quan,BAI Guo-liang,et al.Study on seismic behavior and design method of large-scale thermal power plant RC frame with abnormal exterior joints[J].Journal of Building Structures,2005,26(5):17-22.
[4]白国良,康灵果,白涌滔,等.高烈度区大容量火电厂主厂房新型结构体系整体试验研究报告[R].西安:西安建筑科技大学土木工程学院资料室,2009.
[5]白国良,白涌滔,李红星,等.大型火电厂分散剪力墙-SRC框排架结构抗震性能试验研究[J].工程力学,2011,28(6):74-80,87.BAI Guo-liang,BAI Yong-tao,LI Hong-xing,et al.Experimental study on seismic behavior of scattered shear wall-SRC frame-bent structure in large-scale thermal powerplant[J].Engineering Mechanics,2011,28(6):74-80,87.
[6]白国良,康灵果,李红星,等.大型火力火电厂SRC框架柱-RC分散剪力墙主厂房混合结构体系抗震性能试验研究[J].土木工程学报,2011,44(9):20-26.BAI Guo-liang,KANG Ling-guo,LI Hong-xing,et al.Experimental study of the seismic performance of hybrid structure of SRC frame columns-RC disperse shear walls for large thermal power plants[J].China Civil Engineering Journal,2011,44(9):20-26.
[7]尧国皇,王卫华,郭明.超高层钢框架-钢筋混凝土核心筒结构弹塑性时程分析[J].振动与冲击,2012,31(14):137-142,151.YAO Guo-huang,WANG Wei-hua,GUO Ming.Elasticplastic time history analysis on super rise steel frame-core wall structure[J].Journal of Vibration and Shock,2012,31(14):137-142,151.
[8]GB 50010-2010,混凝土结构设计规范[S].北京:中国建筑工业出版社,2011.
[9]庄茁,张帆,岑松,等.ABAQUS非线性有限元分析与实例[M].北京:科学出版社,2005.
[10]GB 50011-2010,建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[2]白国良,林娜,吴涛,等.大型火电厂钢筋混凝土主厂房框排架结构抗震性能试验研究报告[R].西安:西安建筑科技大学土木工程学院资料室,2002.
[3]吴涛,刘伯权,白国良,等.大型火力发电厂钢筋混凝土框架异型边节点抗震性能及设计方法研究[J].建筑结构学报,2005,26(5):17-22.WU Tao,LIU Bo-quan,BAI Guo-liang,et al.Study on seismic behavior and design method of large-scale thermal power plant RC frame with abnormal exterior joints[J].Journal of Building Structures,2005,26(5):17-22.
[4]白国良,康灵果,白涌滔,等.高烈度区大容量火电厂主厂房新型结构体系整体试验研究报告[R].西安:西安建筑科技大学土木工程学院资料室,2009.
[5]白国良,白涌滔,李红星,等.大型火电厂分散剪力墙-SRC框排架结构抗震性能试验研究[J].工程力学,2011,28(6):74-80,87.BAI Guo-liang,BAI Yong-tao,LI Hong-xing,et al.Experimental study on seismic behavior of scattered shear wall-SRC frame-bent structure in large-scale thermal powerplant[J].Engineering Mechanics,2011,28(6):74-80,87.
[6]白国良,康灵果,李红星,等.大型火力火电厂SRC框架柱-RC分散剪力墙主厂房混合结构体系抗震性能试验研究[J].土木工程学报,2011,44(9):20-26.BAI Guo-liang,KANG Ling-guo,LI Hong-xing,et al.Experimental study of the seismic performance of hybrid structure of SRC frame columns-RC disperse shear walls for large thermal power plants[J].China Civil Engineering Journal,2011,44(9):20-26.
[7]尧国皇,王卫华,郭明.超高层钢框架-钢筋混凝土核心筒结构弹塑性时程分析[J].振动与冲击,2012,31(14):137-142,151.YAO Guo-huang,WANG Wei-hua,GUO Ming.Elasticplastic time history analysis on super rise steel frame-core wall structure[J].Journal of Vibration and Shock,2012,31(14):137-142,151.
[8]GB 50010-2010,混凝土结构设计规范[S].北京:中国建筑工业出版社,2011.
[9]庄茁,张帆,岑松,等.ABAQUS非线性有限元分析与实例[M].北京:科学出版社,2005.
[10]GB 50011-2010,建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.