双T形新型约束屈曲支撑的试验研究
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摘要
双T形新型约束屈曲支撑是一种新型耗能支撑,影响其性能的因素众多。为了考察约束机构、约束比、内核板件宽厚比和内核切割方式等构造因素对其耗能性能的影响,对6个缩尺的双T形新型约束屈曲支撑模型进行低周往复荷载试验,研究支撑结构的破坏形态、滞回性能、耗能能力、位移延性和刚度退化等性能。试验研究表明:该新型支撑的约束机构和内核单元连接可靠;在所考察的因素中,约束机构和约束比的影响较大;具有合理构造的双T形新型支撑滞回圈饱满、耗能稳定、延性较好、屈服后刚度退化较慢。
The double-T-shaped innovative buckling-restrained brace is a new kind of energy-dissipation brace,so the factors affecting its performance are to be numerous.In order to study the influence of the buckling-restrained mechanism,the buckling restraining ratio,defined as the ratio of Euler load of the outer buckling-restrained mechanism to the yielding load of the steel core,width to thickness ratio of the steel core,the incising mode of the steel core etc lon the energy-dissipation capability of the brace,low cyclic loading tests were conducted on six reduced scale brace specimens.The destruction modality,the hysteretic behavior,energy-dissipation,the displacement ductibility,the rigidity degeneration etc of the innovative brace were studied.The test study demonstrates that the joint of the buckling-restrained mechanism and the steel core of this innovative brace is reliable,and the influence of the buckling-restrained mechanism and the buckling restraining ratio is obvious among all the examined factors,and then the brace with rational composition has a full hysteretic loop,stable energy-dissipation behavior,better displacement ductibility,slower rigidity degeneration.
The double-T-shaped innovative buckling-restrained brace is a new kind of energy-dissipation brace,so the factors affecting its performance are to be numerous.In order to study the influence of the buckling-restrained mechanism,the buckling restraining ratio,defined as the ratio of Euler load of the outer buckling-restrained mechanism to the yielding load of the steel core,width to thickness ratio of the steel core,the incising mode of the steel core etc lon the energy-dissipation capability of the brace,low cyclic loading tests were conducted on six reduced scale brace specimens.The destruction modality,the hysteretic behavior,energy-dissipation,the displacement ductibility,the rigidity degeneration etc of the innovative brace were studied.The test study demonstrates that the joint of the buckling-restrained mechanism and the steel core of this innovative brace is reliable,and the influence of the buckling-restrained mechanism and the buckling restraining ratio is obvious among all the examined factors,and then the brace with rational composition has a full hysteretic loop,stable energy-dissipation behavior,better displacement ductibility,slower rigidity degeneration.
引文
[1]蔡克铨,赖俊维.钢骨消能支撑框架之耐震研究[J].结构工程,2002,17(2):3-22.
[2]蔡克铨,黄彦智,翁崇兴.含挫屈束制消能支撑构架耐震性能试验与分析研究[J].结构工程,2004,19(1):3-40.
[3]蔡克铨,黄彦智,翁崇兴.双管式挫屈束制(屈曲约束)支撑之耐震行为与应用[J].建筑钢结构进展,2005,7(3):1-8.
[4]刘育诚.简易强化式挫屈束制斜撑之试验与分析[D].台中:逢甲大学,2005.
[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.
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[7]徐士云.双T形新型约束屈曲支撑的试验研究[D].南京:南京工业大学,2008.
[8]JGJ 101—96建筑抗震试验方法规程[S].
[9]朱伯龙.结构抗震试验[M].北京:地震出版社,1998.
[10]GB 50011—2001建筑抗震设计规范[S].
[2]蔡克铨,黄彦智,翁崇兴.含挫屈束制消能支撑构架耐震性能试验与分析研究[J].结构工程,2004,19(1):3-40.
[3]蔡克铨,黄彦智,翁崇兴.双管式挫屈束制(屈曲约束)支撑之耐震行为与应用[J].建筑钢结构进展,2005,7(3):1-8.
[4]刘育诚.简易强化式挫屈束制斜撑之试验与分析[D].台中:逢甲大学,2005.
[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]汪家铭,中岛正爱.屈曲约束支撑体系的应用和研究进展(Ⅱ)[J].建筑钢结构进展,2005,7(2):1-11.
[7]徐士云.双T形新型约束屈曲支撑的试验研究[D].南京:南京工业大学,2008.
[8]JGJ 101—96建筑抗震试验方法规程[S].
[9]朱伯龙.结构抗震试验[M].北京:地震出版社,1998.
[10]GB 50011—2001建筑抗震设计规范[S].
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