非切削防屈曲支撑破坏机理分析
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摘要
为检验非切削防屈曲支撑(NBRB)的构造和抗震性能,本文对非切削构造进行了ANSYS有限元塑性静力分析,并与切削构造进行力学性能对比,明确了其受力特点及薄弱环节;在有限元分析的基础上,对所设计的试件进行了低周反复加载静力试验。结果表明:由于焊缝的存在,非切削防屈曲支撑更容易在该截面发生强度或失稳破坏,对焊接质量提出更高的要求;试件荷载-位移滞回曲线稳定、饱满、对称;非切削防屈曲支撑构造合理,具有良好的耗能性能和抗低周疲劳性能,是一种新型的耗能支撑。
To test the construction and seismic performance of the non-cutting buckling-restrained braces(NBRB),the ANSYS finite element elastoplastic static analysis was made for the non-cutting structure,the non-cutting structure was compared with cutting structure in terms of mechanics properties,and stress characteristics and weakness of the NBRB were verified;On the basis of the finite element analysis,a low-cycle loading static test for the designed parts was conducted repeatedly.The result showed that,because of the existence of weld seam,strength failure and stability loss of NBRB occur more easily at this section,thus higher requirement is put forward for the welding quality;The load-displacement curve of NBRB is stable,energetic and symmetrical.This NBRB is a new type of energy dissipation brace,which has a reliable construction with high energy dissipation ability and low-cycle fatigue resistance performance.
To test the construction and seismic performance of the non-cutting buckling-restrained braces(NBRB),the ANSYS finite element elastoplastic static analysis was made for the non-cutting structure,the non-cutting structure was compared with cutting structure in terms of mechanics properties,and stress characteristics and weakness of the NBRB were verified;On the basis of the finite element analysis,a low-cycle loading static test for the designed parts was conducted repeatedly.The result showed that,because of the existence of weld seam,strength failure and stability loss of NBRB occur more easily at this section,thus higher requirement is put forward for the welding quality;The load-displacement curve of NBRB is stable,energetic and symmetrical.This NBRB is a new type of energy dissipation brace,which has a reliable construction with high energy dissipation ability and low-cycle fatigue resistance performance.
引文
[1]高向宇,张慧,杜海燕,梁峰.组合热轧角钢防屈曲支撑构造及抗震试验[J].北京工业大学学报,2008.5.
[2]Steve Mahin,etc.UCB 2002 Report(Test1~Test3)[R].University of California,2002,Berkeley.
[3]Hiroshi NAKAMURA,etc.Nippon Steel Technical Report[R].2000,82(July).
[4]James Newell,etc.Subassemblage Testing of Core-braceBuckling-Restrained Braces(Fseries)[R].Report No.TR-05/01,2005,January.
[5]褚洪民,钱洪涛,邓雪松,周云.应用防屈曲耗能支撑进行抗震加固的研究与应用[J].四川建筑科学研究,2007,(12).
[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,(7).
[7]陈祥勇.约束屈曲支撑在单层网壳结构中的减震效果分析[D].兰州:兰州理工大学,2006.
[8]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,(1).
[9]汪家铭,中岛正爱.屈曲约束支撑体系的应用与研究进展(Ⅱ)[J].建筑钢结构进展,2005,(2).
[10]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.
[11]哈敏强.普通和新型抑制屈曲支撑的力学性能及其应用研究[D].上海:同济大学,2004.
[12]毕惠琴.焊接方法及设备[M].北京,机械工业出版社,1981.
[13]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.
[2]Steve Mahin,etc.UCB 2002 Report(Test1~Test3)[R].University of California,2002,Berkeley.
[3]Hiroshi NAKAMURA,etc.Nippon Steel Technical Report[R].2000,82(July).
[4]James Newell,etc.Subassemblage Testing of Core-braceBuckling-Restrained Braces(Fseries)[R].Report No.TR-05/01,2005,January.
[5]褚洪民,钱洪涛,邓雪松,周云.应用防屈曲耗能支撑进行抗震加固的研究与应用[J].四川建筑科学研究,2007,(12).
[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,(7).
[7]陈祥勇.约束屈曲支撑在单层网壳结构中的减震效果分析[D].兰州:兰州理工大学,2006.
[8]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,(1).
[9]汪家铭,中岛正爱.屈曲约束支撑体系的应用与研究进展(Ⅱ)[J].建筑钢结构进展,2005,(2).
[10]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.
[11]哈敏强.普通和新型抑制屈曲支撑的力学性能及其应用研究[D].上海:同济大学,2004.
[12]毕惠琴.焊接方法及设备[M].北京,机械工业出版社,1981.
[13]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.
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