带BRB的新型框架结构滞回性能分析
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摘要
结合工程实例,对加层后抗侧刚度不足的钢筋混凝土框架结构,采用布置屈曲约束支撑的办法来满足结构弹性位移角限值的设计要求.首先运用ANSYS软件输入地震波对加层结构进行动力时程分析,然后对不满足规范要求的层间位移角限值的楼层布置屈曲约束支撑,再对加支撑结构进行多遇和罕遇地震下的抗震验算.结果表明,布置屈曲约束支撑后,加层结构的层间位移角均能满足规范的要求,最大减幅可达27.5%;罕遇作用下屈曲约束支撑在大部分时间屈服从而达到应力屈服强度(108 Pa),具有良好的耗能减震性能.
Aiming at an actual engineering project,the paper provided a design process of the buckling-restrained braces on RC frame structure which is stiffness-insufficient for storey-adding to meet the angle limitation of elastic displacement.The elastic time history analysis of the entire construction was carried out first by using software ANSYS to input the seismic waves;then,the buckling restrained braces were installed in those building storeys where the story drift ratio between two storeys did not agree with the norms;finally,the entire construction was checked in the case of common and uncommon seismic action.As a result,the story drift ratio of the RC frame with buckling-restrained braces meets the norm of elastic displacement angle.The largest relative reduction of decrease is 27.5%;and the BRB can reach the stress yield strength(108 Pa) in the most time of the uncommon seismic action,and it can dissipate earthquake energy fully.
Aiming at an actual engineering project,the paper provided a design process of the buckling-restrained braces on RC frame structure which is stiffness-insufficient for storey-adding to meet the angle limitation of elastic displacement.The elastic time history analysis of the entire construction was carried out first by using software ANSYS to input the seismic waves;then,the buckling restrained braces were installed in those building storeys where the story drift ratio between two storeys did not agree with the norms;finally,the entire construction was checked in the case of common and uncommon seismic action.As a result,the story drift ratio of the RC frame with buckling-restrained braces meets the norm of elastic displacement angle.The largest relative reduction of decrease is 27.5%;and the BRB can reach the stress yield strength(108 Pa) in the most time of the uncommon seismic action,and it can dissipate earthquake energy fully.
引文
[1]建筑抗震设计规范(GB50011-2010)[S].中国建筑工业出版社,2010.
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[3]胡宝琳,李国强,孙飞飞.屈曲约束支撑体系的研究现状及国内外应用[J].四川建筑科学研究,2007,33(4):9-13.
[4]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反应谱分析[J].工程抗震与加固改造,2006,28(3):95-100.
[5]王秀丽,张晓将,高麟.带BRBs的钢筋混凝土框架结构地震响应分析[A].第八届全国现代结构工程学术研讨会论文集[C]//.北京:工业建筑杂志社,2008.
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[7]胡大柱,尤毓慧,邵宏政.屈曲约束耗能支撑在教学楼加固过程中的应用[J].工程抗震与加固改造,2009,31(6):88-92.
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[9]王秀丽,白生学.带BRB的单层椭球形网壳的动力弹塑性分析[J].甘肃科学学报,2010,22(4):88-91.
[10]曹双寅,周屹.整体式框架剪力墙结构加层房屋的抗震分析[J].东南大学学报,1999,29(1):93-96.
[2]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,2007,33(5):105-108.
[3]胡宝琳,李国强,孙飞飞.屈曲约束支撑体系的研究现状及国内外应用[J].四川建筑科学研究,2007,33(4):9-13.
[4]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反应谱分析[J].工程抗震与加固改造,2006,28(3):95-100.
[5]王秀丽,张晓将,高麟.带BRBs的钢筋混凝土框架结构地震响应分析[A].第八届全国现代结构工程学术研讨会论文集[C]//.北京:工业建筑杂志社,2008.
[6]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):112-116.
[7]胡大柱,尤毓慧,邵宏政.屈曲约束耗能支撑在教学楼加固过程中的应用[J].工程抗震与加固改造,2009,31(6):88-92.
[8]张树传,王亚勇.规范反应谱在消能减震设计中的应用[J].建筑结构,2008,38(3):101-105.
[9]王秀丽,白生学.带BRB的单层椭球形网壳的动力弹塑性分析[J].甘肃科学学报,2010,22(4):88-91.
[10]曹双寅,周屹.整体式框架剪力墙结构加层房屋的抗震分析[J].东南大学学报,1999,29(1):93-96.
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