带BRB的不规则框架抗震性能研究
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摘要
对不规则结构,当结构的刚度中心与质量中心偏差较大时,应考虑扭转的不利影响.针对高烈度区抗侧刚度与抗扭刚度不足的不规则钢筋混凝土框架结构,通过布置屈曲约束支撑以满足弹性位移角的设计方法进行研究.结合工程实例,对不满足要求的楼层加屈曲约束支撑.对结构在多遇地震和罕遇地震下进行了动力时程分析.结果表明,加屈曲约束支撑后结构的层间位移角满足规范的要求,并且可以有效地控制不规则结构在地震作用下的扭转变形,具有良好的耗能减震性能.
For irregular structures,the disadvantageous effect of torsional deformation should be considered when the deflection between the structural center of rigidity and the mass center exists.The buckling-restrained braces are designed to meet the needs of elastic angle of displacement.In the constraction site,the buckling-restrained braces can be added to those floors which do not satisfy the above demand.The dynamic time-history analysis must be made under the conditions of multiple or rare earthqmakes.The results show that the buckling-restrained braces can control effectively the torsional deformation of the irregular structures under the action of earthquakes,and the structure can dissipate the energy of earthquakes.
For irregular structures,the disadvantageous effect of torsional deformation should be considered when the deflection between the structural center of rigidity and the mass center exists.The buckling-restrained braces are designed to meet the needs of elastic angle of displacement.In the constraction site,the buckling-restrained braces can be added to those floors which do not satisfy the above demand.The dynamic time-history analysis must be made under the conditions of multiple or rare earthqmakes.The results show that the buckling-restrained braces can control effectively the torsional deformation of the irregular structures under the action of earthquakes,and the structure can dissipate the energy of earthquakes.
引文
[1]杨诚.某超高层结构的扭转分析与设计[J].广东土木与建筑,2009,3(3):10-12.
[2]魏琏,王森,韦承基.水平地震作用下不对称不规则结构的抗扭设计方法研究[J].建筑结构,2005,35(8):12-17.
[3]谢强,赵亮.屈曲约束支撑的研究进展及其应用[J].钢结构,2006,21(1):46-48.
[4]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.
[5]刘建彬.防屈曲支撑及防屈曲支撑钢框架设计理论研究[D].北京:清华大学,2005.
[6]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.
[7]王秀丽,李涛,金建民,等.高烈度区新型钢筋混凝土框架的抗震性能[J].兰州理工大学学报,2009,35(2):105-109.
[8]韩军,李英民.抗震结构扭转控制及设计方法的国内外规范对比分析[J].西安建筑科技大学学报,2008,40(1):25-32.
[9]GB50011-2001.建筑抗震设计规范[S].
[10]李晓东,王秀玉,殷占忠.具有侧向支撑的屈曲约束支撑整体稳定性分析[J].甘肃科学学报,2008,20(3):122-125.
[2]魏琏,王森,韦承基.水平地震作用下不对称不规则结构的抗扭设计方法研究[J].建筑结构,2005,35(8):12-17.
[3]谢强,赵亮.屈曲约束支撑的研究进展及其应用[J].钢结构,2006,21(1):46-48.
[4]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.
[5]刘建彬.防屈曲支撑及防屈曲支撑钢框架设计理论研究[D].北京:清华大学,2005.
[6]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.
[7]王秀丽,李涛,金建民,等.高烈度区新型钢筋混凝土框架的抗震性能[J].兰州理工大学学报,2009,35(2):105-109.
[8]韩军,李英民.抗震结构扭转控制及设计方法的国内外规范对比分析[J].西安建筑科技大学学报,2008,40(1):25-32.
[9]GB50011-2001.建筑抗震设计规范[S].
[10]李晓东,王秀玉,殷占忠.具有侧向支撑的屈曲约束支撑整体稳定性分析[J].甘肃科学学报,2008,20(3):122-125.
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