巨型框架结构体系的动力特性及地震响应分析
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摘要
采用大型有限元软件ANSYS对巨型框架结构进行了动力时程分析,讨论了不同主次框架刚度比下巨型框架结构的动力特性及地震响应。计算结果表明,钢筋混凝土巨型框架在地震作用下的侧移曲线为弯剪型;主次框架刚度比对巨型框架弹性地震反应有较大影响;结构的高阶频率对结构有一定影响,当与地震波卓越周期相近时可能会发生类共振现象。计算结果对巨型框架结构的抗震设计有较大的参考价值。
Using the ANSYS finite element software,it was conducted a dynamic time-history analysis of a mega-frame structure.The dynamic characteristics and the seismic responses of the mega-frame structure are discussed in detail.The calculated results show that the displacement curve of reinforced concrete mega-frame structures is a type of flexure-shear.The stiffness ratio of the major and the minor frames is an important factor which has a carger influence on the elastic seismic response of the mega-frame structure.The higher order frequency of the structure has a certain influence on the structure,when it is close to the earthquake wave predominant period,a pseudo-resonance phenomenon may oceur.The calculation results may be a useful refernce for the design of earthquake resistance of mega-frames.
Using the ANSYS finite element software,it was conducted a dynamic time-history analysis of a mega-frame structure.The dynamic characteristics and the seismic responses of the mega-frame structure are discussed in detail.The calculated results show that the displacement curve of reinforced concrete mega-frame structures is a type of flexure-shear.The stiffness ratio of the major and the minor frames is an important factor which has a carger influence on the elastic seismic response of the mega-frame structure.The higher order frequency of the structure has a certain influence on the structure,when it is close to the earthquake wave predominant period,a pseudo-resonance phenomenon may oceur.The calculation results may be a useful refernce for the design of earthquake resistance of mega-frames.
引文
1蓝宗建,杨东升,张敏.钢筋混凝土巨型框架结构弹性地震反应分析.东南大学学报,2002,32(5):724-727
2李正良.钢筋混凝土巨型结构组合体系的静动力分析:[博士学位论文].重庆:重庆大学,1999
3秦卫红,惠卓,吕志涛.巨型框架结构的设计方法初探.建筑结构,2001,31(7):43-47
4段红霞,李正良.RC巨型框架结构抗震设计中的能力设计措施.重庆大学学报,2004,27(6):118-123
5舒赣平,张宇峰,吕志涛,等.巨型框架结构的动力性能研究及设计建议.土木工程学报,2003,36(2):41-45,62
6 Tian Y,Yang Q S,Lan Z J.Mega-Frame Structures with ControlDevices//Proceedings of the Eighth International Symposium onStructural Engineering for Young Experts.2004:429-433
7盛朝晖,陈准.巨型框架结构的抗震分析.工业建筑,2006,36(增刊):192-194
8杨溥,李英明,赖明.结构时程分析法输入地震波的选择控制指标.土木工程学报,2000,33(1):33-37
9尚晓江,邱峰,赵海峰,等.ANSYS结构有限元高级分析方法与范例应用.北京:中国水利水电出版社,2006
10博弈创作室.APDL参数化有限元分析技术及其应用实例.北京:中国水利水电出版社,2004
2李正良.钢筋混凝土巨型结构组合体系的静动力分析:[博士学位论文].重庆:重庆大学,1999
3秦卫红,惠卓,吕志涛.巨型框架结构的设计方法初探.建筑结构,2001,31(7):43-47
4段红霞,李正良.RC巨型框架结构抗震设计中的能力设计措施.重庆大学学报,2004,27(6):118-123
5舒赣平,张宇峰,吕志涛,等.巨型框架结构的动力性能研究及设计建议.土木工程学报,2003,36(2):41-45,62
6 Tian Y,Yang Q S,Lan Z J.Mega-Frame Structures with ControlDevices//Proceedings of the Eighth International Symposium onStructural Engineering for Young Experts.2004:429-433
7盛朝晖,陈准.巨型框架结构的抗震分析.工业建筑,2006,36(增刊):192-194
8杨溥,李英明,赖明.结构时程分析法输入地震波的选择控制指标.土木工程学报,2000,33(1):33-37
9尚晓江,邱峰,赵海峰,等.ANSYS结构有限元高级分析方法与范例应用.北京:中国水利水电出版社,2006
10博弈创作室.APDL参数化有限元分析技术及其应用实例.北京:中国水利水电出版社,2004
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