新型Pall-BRB摩擦阻尼支撑体系设计方法
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摘要
考虑几何非线性采用ANSYS有限元软件对一种新型Pall-BRB摩擦阻尼支撑体系(采用防屈曲支撑(BRB)代替Pall型摩擦阻尼器(PFD)的普通支撑)的滞回特性进行分析.首先进行了Pall型普通支撑体系和Pall-BRB摩擦阻尼支撑体系的滞回性能对比分析,结果表明,防屈曲支撑在拉压循环荷载作用下均能达到屈服,拉压承载力基本一致,耗能能力优于普通支撑.然后分析了防屈曲支撑刚度、Pall型阻尼器起滑摩擦力、阻尼器的大小以及防屈曲支撑与水平方向的倾角等因素对体系滞回特性以及支撑内力的影响.结果表明,Pall-BRB支撑体系比Pall型普通支撑体系有更好的耗能性能,支撑内力变化不大且在阻尼器起滑后保持为常数,有利于抗震设计;防屈曲支撑最大内力与起滑摩擦力关系密切,起滑摩擦力越大,体系耗能能力越强,支撑越能充分发挥作用.最后提出了这种新型Pall-BRB摩擦阻尼支撑体系的设计方法.
Based on the geometry nonlinearity,the hysteretic behavior of a new-typed Pall-BRB frictional damping brace system,whose braces are buckling restrained braces(BRB) instead of conventional common Pall-typed frictional damper(PFD) braces,is analyzed using ANSYS finite element software.The hysteretic behavior of Pall-BRB frictional damping brace system is compared with the common PFD brace system.The analytical results show that the buckling restrained braces can reach tension and compression,and the ultimate compression and tension strengths are almost the same,and the energy dissipation is very good.At the same time,the influence of BRB′s stiffness,slip force of the Pall-typed damper,the size of damper and the elevation angle of BRB on hysteretic of system and tension force is analyzed.The results show that the Pall-BRB brace system has better energy dissipation than original Pall brace system,the tension force of the BRBs can keep constant;the maximum tension force of BRBs has relationship with slip force of damper,and the greater the slip force of damper is,the greater the energy dissipation is,and the BRBs can act fully.Finally,a simple design method of Pall-BRB frictional damping brace system is proposed.
Based on the geometry nonlinearity,the hysteretic behavior of a new-typed Pall-BRB frictional damping brace system,whose braces are buckling restrained braces(BRB) instead of conventional common Pall-typed frictional damper(PFD) braces,is analyzed using ANSYS finite element software.The hysteretic behavior of Pall-BRB frictional damping brace system is compared with the common PFD brace system.The analytical results show that the buckling restrained braces can reach tension and compression,and the ultimate compression and tension strengths are almost the same,and the energy dissipation is very good.At the same time,the influence of BRB′s stiffness,slip force of the Pall-typed damper,the size of damper and the elevation angle of BRB on hysteretic of system and tension force is analyzed.The results show that the Pall-BRB brace system has better energy dissipation than original Pall brace system,the tension force of the BRBs can keep constant;the maximum tension force of BRBs has relationship with slip force of damper,and the greater the slip force of damper is,the greater the energy dissipation is,and the BRBs can act fully.Finally,a simple design method of Pall-BRB frictional damping brace system is proposed.
引文
[1]吴斌,张纪刚,欧进萍.考虑几何非线性的Pall型摩擦阻尼器滞回特性分析[J].工程力学,2003,20(1):21-26
[2]WU B,ZHANG J G,WILLIAMS M,et al.Hysteretic behavior of improved Pall-typed frictionaldampers[J].Engineering Structures,2005,27(8):1258-1267
[3]吴斌,张纪刚.基于几何非线性的Pall型摩擦阻尼器滞回特性分析与试验验证[J].地震工程与工程震动,2001,21(4):60-65
[4]吴斌,张纪刚,欧进萍.Pall型摩擦阻尼器的试验研究与数值分析[J].建筑结构学报,2003,24(2):7-13
[5]贾明明,张素梅.抑制屈曲支撑滞回性能分析[J].天津大学学报,2008,41(6):736-744
[6]李妍,吴斌,王倩颖,等.防屈曲钢支撑阻尼器的试验研究[J].土木工程学报,2006,39(7):9-14
[7]XIE Qiang.State of the art of buckling-restrainedbraces in Asia[J].Journal of Constructional SteelResearch,2005,61(6):727-748
[8]BLACK C J,MAKRIS N,AIKEN I D.Componenttesting,seismic evaluation and characterization ofbuckling-restrained braces[J].Journal of StructuralEngineering,2004,130(6):800-894
[9]贾明明,张素梅.采用抑制屈曲支撑的钢框架结构性能分析[J].东南大学学报(自然科学版),2007,37(6):1041-1047
[10]汪家铭,中岛正爱.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):1-12
[11]钱洪涛,褚洪民,邓雪松.防屈曲支撑的研究与应用进展[J].防灾减灾工程学报,2007,27(s):225-233
[12]程光煜,叶列平,许秀珍,等.防屈曲耗能钢支撑的试验研究[J].建筑结构学报,2008,29(1):31-39
[13]章从俊,李爱群,赵福令.软钢支撑耗能器的研制和有限元分析[J].工程抗震与加固改造,2008,30(3):10-14
[14]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007:443-448
[15]吴斌,张纪刚,欧进萍.Pall型摩擦阻尼支撑内力计算方法[J].世界地震工程,2004,20(2):6-11
[16]程光煜,叶列平,崔鸿超.防屈曲耗能钢支撑设计方法的研究[J].建筑结构学报,2008,29(1):40-48
[17]周云.防屈曲耗能支撑结构设计与应用[M].北京:中国建筑工业出版社,2007:150-177
[2]WU B,ZHANG J G,WILLIAMS M,et al.Hysteretic behavior of improved Pall-typed frictionaldampers[J].Engineering Structures,2005,27(8):1258-1267
[3]吴斌,张纪刚.基于几何非线性的Pall型摩擦阻尼器滞回特性分析与试验验证[J].地震工程与工程震动,2001,21(4):60-65
[4]吴斌,张纪刚,欧进萍.Pall型摩擦阻尼器的试验研究与数值分析[J].建筑结构学报,2003,24(2):7-13
[5]贾明明,张素梅.抑制屈曲支撑滞回性能分析[J].天津大学学报,2008,41(6):736-744
[6]李妍,吴斌,王倩颖,等.防屈曲钢支撑阻尼器的试验研究[J].土木工程学报,2006,39(7):9-14
[7]XIE Qiang.State of the art of buckling-restrainedbraces in Asia[J].Journal of Constructional SteelResearch,2005,61(6):727-748
[8]BLACK C J,MAKRIS N,AIKEN I D.Componenttesting,seismic evaluation and characterization ofbuckling-restrained braces[J].Journal of StructuralEngineering,2004,130(6):800-894
[9]贾明明,张素梅.采用抑制屈曲支撑的钢框架结构性能分析[J].东南大学学报(自然科学版),2007,37(6):1041-1047
[10]汪家铭,中岛正爱.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):1-12
[11]钱洪涛,褚洪民,邓雪松.防屈曲支撑的研究与应用进展[J].防灾减灾工程学报,2007,27(s):225-233
[12]程光煜,叶列平,许秀珍,等.防屈曲耗能钢支撑的试验研究[J].建筑结构学报,2008,29(1):31-39
[13]章从俊,李爱群,赵福令.软钢支撑耗能器的研制和有限元分析[J].工程抗震与加固改造,2008,30(3):10-14
[14]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007:443-448
[15]吴斌,张纪刚,欧进萍.Pall型摩擦阻尼支撑内力计算方法[J].世界地震工程,2004,20(2):6-11
[16]程光煜,叶列平,崔鸿超.防屈曲耗能钢支撑设计方法的研究[J].建筑结构学报,2008,29(1):40-48
[17]周云.防屈曲耗能支撑结构设计与应用[M].北京:中国建筑工业出版社,2007:150-177
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