带BRB钢—砼混合加层结构抗震性能分析
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摘要
采用ANSYS程序建立了3层框架结构加2层钢框架后的有限元模型,对该加层框架结构在设置约束屈曲支撑前后进行多遇及罕遇地震作用下的时程分析对比.结果表明,设置了约束屈曲支撑后增加了结构的耗能能力:层间位移角最大折减率达到47.8%,提出了混合结构比较合理的阻尼比,达到了对结构振动控制的目的,并且较精确地反映了设置约束屈曲支撑后该结构地震反应的实际,是一种较为实用和精确的计算方法.
A finite element model for a frame structure of three floors adding two storeys on top of it is set up by using ANSYS.By analyzing and comparing the two cases of adding steel stories with and without braces under the conditions of multiple or rare earthquakes,it is shown that the buckling restraining braces can enhance the structure's aseismic capacity,the maximum reducing ratio of storey-to-storey shift angle is as high as 47.8%.It can raise the rational damping ratio of the hybrid structure and control its vibration and accurately reflect the seismic response of the structure.It is a practical and precise calculating method.
A finite element model for a frame structure of three floors adding two storeys on top of it is set up by using ANSYS.By analyzing and comparing the two cases of adding steel stories with and without braces under the conditions of multiple or rare earthquakes,it is shown that the buckling restraining braces can enhance the structure's aseismic capacity,the maximum reducing ratio of storey-to-storey shift angle is as high as 47.8%.It can raise the rational damping ratio of the hybrid structure and control its vibration and accurately reflect the seismic response of the structure.It is a practical and precise calculating method.
引文
[1]宋锋,王元清,石永久,等.钢结构跃层加层技术及其工程应用[J].工业建筑,2004,34(10):56-58.
[2]张涛,王元清,石永久,等.钢筋混凝土框架顶部钢结构加层的抗震性能的时程分析[J].四川建筑科学研究,2006,32(5):140-143.
[3]万松琳,杨晓明,董颖杰.钢结构加层中支撑对结构抗震性能的影响[J].青岛理工大学学报,2009,30(4):186-190.
[4]吴晓枫,余萍,胡孝平.某框架结构加层后的地震反应控制分析[J].水利与建筑工程学报,2008,6(3):44-46.
[5]王秀丽,苏成江.约束屈曲支撑受力性能及高阶模态分析[J].兰州理工大学学报,2007,10(1):105-108.
[6]殷占忠,王秀丽,李晓东.双钢管约束屈曲支撑的有限元分析[J].甘肃科学学报,2010,22(1):110-113.
[7]王秀丽,李涛,金建民,等.高烈度区新型钢筋砼框架的抗震性能[J].兰州理工大学学报,2009,35(2):106-109.
[8]王秀丽,蔡建辉.带BRB的不规则框架抗震性能研究[J].甘肃科学学报,2010,22(3):113-116.
[9]王秀丽,王磊,薛素铎.大跨复杂屋面组合结构协同工作动力性能研究[J].北京工业大学学报,2010,36(9):1216-1221.
[2]张涛,王元清,石永久,等.钢筋混凝土框架顶部钢结构加层的抗震性能的时程分析[J].四川建筑科学研究,2006,32(5):140-143.
[3]万松琳,杨晓明,董颖杰.钢结构加层中支撑对结构抗震性能的影响[J].青岛理工大学学报,2009,30(4):186-190.
[4]吴晓枫,余萍,胡孝平.某框架结构加层后的地震反应控制分析[J].水利与建筑工程学报,2008,6(3):44-46.
[5]王秀丽,苏成江.约束屈曲支撑受力性能及高阶模态分析[J].兰州理工大学学报,2007,10(1):105-108.
[6]殷占忠,王秀丽,李晓东.双钢管约束屈曲支撑的有限元分析[J].甘肃科学学报,2010,22(1):110-113.
[7]王秀丽,李涛,金建民,等.高烈度区新型钢筋砼框架的抗震性能[J].兰州理工大学学报,2009,35(2):106-109.
[8]王秀丽,蔡建辉.带BRB的不规则框架抗震性能研究[J].甘肃科学学报,2010,22(3):113-116.
[9]王秀丽,王磊,薛素铎.大跨复杂屋面组合结构协同工作动力性能研究[J].北京工业大学学报,2010,36(9):1216-1221.
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