单层椭球形网壳考虑下部结构减震性能分析
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摘要
通过大型有限元分析软件ANSYS对40m跨单层椭球形网壳结构进行研究和参数分析。模型中的下部结构采用钢筋混凝土柱,以考虑对网壳的影响,并对单层椭球形网壳是否考虑下部结构的两种计算模型进行了自振振型下的模态比较。文中提出此类网壳屈曲约束支撑的布置方式,等截面替换了网壳内的部分杆件,并对有屈曲约束支撑单层椭球形网壳的减震性能进行分析。结果表明,下部结构对结构整体的影响不可忽略,合理布置约束屈曲支撑的网壳结构减震效果较好。
The finite element analysis software ANSYS program is applied to analyze the 40m span single-layer oval shell and its parameters in this paper.In the model the the reinforced concrete column is selected as the sub-structure, so as to consider its effect on the shell.The modes under natural vibration model are comparatively analyzed whether the single-layer oval shell is with the sub-structure or not.A kind of BRB arrangement mode is presented by which some sections of the shell with the same area as BRBs are replaced,and the vibration reducing performance of the single-layer oval shell with BRBs is studied.The results show that the effect of the Sub-structure can not be ignored and the vibration reducing effect of the shell structure is doing well by rational arrangement of the BRBs.
The finite element analysis software ANSYS program is applied to analyze the 40m span single-layer oval shell and its parameters in this paper.In the model the the reinforced concrete column is selected as the sub-structure, so as to consider its effect on the shell.The modes under natural vibration model are comparatively analyzed whether the single-layer oval shell is with the sub-structure or not.A kind of BRB arrangement mode is presented by which some sections of the shell with the same area as BRBs are replaced,and the vibration reducing performance of the single-layer oval shell with BRBs is studied.The results show that the effect of the Sub-structure can not be ignored and the vibration reducing effect of the shell structure is doing well by rational arrangement of the BRBs.
引文
[1]王秀丽,陈继云,闫志刚.考虑下部结构影响的单层组合网壳地震反应分析[A].第七届全国现代钢结构工程学术研讨会[C].北京:工业建筑杂志社.2007.933-936.
[2]薛素铎,曹资,王建宁.单层柱面网壳弹塑性地震反应特征[J].地震工程与工程振动.2002,22(1):57-60.
[3]曹资,张毅刚.单层球面网壳地震反应特征分析[J].建筑结构.1998,28(8):40-43.
[4]王秀丽,王磊.新型椭球网壳减震体系性能分析[J].工程抗震与加固改造.2007,29(4):31-36.
[5]范峰、沈世钊.单层柱面网壳的粘滞阻尼器减振分析[J].世界地震工程,2003,19(2):28-29.
[6]郭小农,陈扬骥.短程线型单层球面网壳抗震分析[J].空间结构.1999,5(2):3-9.
[7]汪家铭、中岛正爱,陆烨(译).屈曲约束支撑体系的应用与研究进展(I)[J]建筑钢结构进展,2005,7(1):2-3.
[2]薛素铎,曹资,王建宁.单层柱面网壳弹塑性地震反应特征[J].地震工程与工程振动.2002,22(1):57-60.
[3]曹资,张毅刚.单层球面网壳地震反应特征分析[J].建筑结构.1998,28(8):40-43.
[4]王秀丽,王磊.新型椭球网壳减震体系性能分析[J].工程抗震与加固改造.2007,29(4):31-36.
[5]范峰、沈世钊.单层柱面网壳的粘滞阻尼器减振分析[J].世界地震工程,2003,19(2):28-29.
[6]郭小农,陈扬骥.短程线型单层球面网壳抗震分析[J].空间结构.1999,5(2):3-9.
[7]汪家铭、中岛正爱,陆烨(译).屈曲约束支撑体系的应用与研究进展(I)[J]建筑钢结构进展,2005,7(1):2-3.
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