基于ANSYS的巨型框架结构体系地震响应分析
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摘要
文章采用有限元软件ANSYS自带的APDL语言进行参数化三维结构建模,对巨型框架结构进行抗震性能计算分析,包括模态分析、谱分析及时程分析,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。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影响较大;当结构高阶频率对应周期与地震波卓越周期相近时有可能发生类共振现象。
Using the ANSYS parametric design language(APDL),a three-dimensional parametric finite element model is set up in this paper.The aseismatic performance of the mega-frame structure is discussed including the modal analysis,spectral analysis,and time-history analysis.And the dynamic characteristic and seismic response of the mega-frame structure with different stiffness ratio between the major and minor frames are studied.The results show that the displacement curve of reinforced concrete(RC) mega-frame structures is a type of flexure-shear.The stiffness ratio between the major and minor frames has a notable influence on the elastic seismic response of the structure.The higher order frequency of the structure has certain influence on the structure,and when its period is close to the earthquake wave predominant one,a pseudo-resonance phenomenon may occur.
Using the ANSYS parametric design language(APDL),a three-dimensional parametric finite element model is set up in this paper.The aseismatic performance of the mega-frame structure is discussed including the modal analysis,spectral analysis,and time-history analysis.And the dynamic characteristic and seismic response of the mega-frame structure with different stiffness ratio between the major and minor frames are studied.The results show that the displacement curve of reinforced concrete(RC) mega-frame structures is a type of flexure-shear.The stiffness ratio between the major and minor frames has a notable influence on the elastic seismic response of the structure.The higher order frequency of the structure has certain influence on the structure,and when its period is close to the earthquake wave predominant one,a pseudo-resonance phenomenon may occur.
引文
[1]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[J].土木工程学报,2003,36(2):41-45,62.
[2]沈蒲生.巨型框架结构设计与施工[M].北京:机械工业出版社,2007:15-28.
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[4]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[J].东南大学学报:自然科学版,2002,32(5):724-727.
[5]王亚勇.关于设计反应谱、时程法和能量方法的探讨[J].建筑结构学报,2000,21(1):21-28.
[6]GB 50011-2001,建筑抗震设计规范[S].
[7]叶献国,刘涛,徐勤,等.振动台三维模拟地震试验研究[J].合肥工业大学学报:自然科学版,1998,21(Z1):1-6.
[8]常磊,叶献国,潘文军.基于能量反应谱的结构能量反应竖向分布研究[J].合肥工业大学学报:自然科学版,2011,34(2):264-267,291.
[2]沈蒲生.巨型框架结构设计与施工[M].北京:机械工业出版社,2007:15-28.
[3]龚曙光,谢桂兰.ANSYS操作命令与参数化编程[M].北京:机械工业出版社,2004:21-37.
[4]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[J].东南大学学报:自然科学版,2002,32(5):724-727.
[5]王亚勇.关于设计反应谱、时程法和能量方法的探讨[J].建筑结构学报,2000,21(1):21-28.
[6]GB 50011-2001,建筑抗震设计规范[S].
[7]叶献国,刘涛,徐勤,等.振动台三维模拟地震试验研究[J].合肥工业大学学报:自然科学版,1998,21(Z1):1-6.
[8]常磊,叶献国,潘文军.基于能量反应谱的结构能量反应竖向分布研究[J].合肥工业大学学报:自然科学版,2011,34(2):264-267,291.
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