约束条件对加劲消能器性能的影响
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摘要
通过加劲消能器性能试验与工程实际安装情况的对比,指出了两种工况下消能器所受约束条件的差异。选取典型加劲消能器,采用ABAQUS有限元软件模拟不同约束条件下的消能器,对比分析了初始刚度、滞回性能和极限位移等消能器主要性能指标。结果表明,在工程实际约束下,消能器耗能片的塑性应变发展速度明显大于试验约束条件下;试验约束下消能器的极限位移为60 mm,而工程实际约束下仅为40 mm;试验误差达50%。这将对消能器在强震下的稳定性产生不利影响。因此,加劲消能器性能试验应尽量模拟工程中实际受到的约束,以正确评估消能器性能。
The actual state of dampers with added damping was compared with the one in experiment.Some differences existed in the constraint condition between them.A finite element model of the damper with added damping and stiffness was built with ABAQUS to find out the differences of the performance parameters,including yield force,initial rigidity,hysteretic behavior and ultimate drift.The results show that the increment of the strain is different under the two constraint conditions.The ultimate displacement could reach 60 mm in the experimental constraint condition,while the one in actual condition was only 40 mm.The difference was about 50%.This difference can reduce the stability of the damper and lead to a premature failure.Therefore,in order to evaluate the damper's performance correctly,the constraint condition of experiment must be in accordance with the actual working condition as much as possible.
The actual state of dampers with added damping was compared with the one in experiment.Some differences existed in the constraint condition between them.A finite element model of the damper with added damping and stiffness was built with ABAQUS to find out the differences of the performance parameters,including yield force,initial rigidity,hysteretic behavior and ultimate drift.The results show that the increment of the strain is different under the two constraint conditions.The ultimate displacement could reach 60 mm in the experimental constraint condition,while the one in actual condition was only 40 mm.The difference was about 50%.This difference can reduce the stability of the damper and lead to a premature failure.Therefore,in order to evaluate the damper's performance correctly,the constraint condition of experiment must be in accordance with the actual working condition as much as possible.
引文
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[4]Keh-Cyuan Tsai,Huan-Wei Chen,Ching-Ping Hong,et al.Design of steel triangular plate energy absorberfor seismic-resistant construction[J].EarthquakeSpectra,1993,9:3,505-528.
[5]Tsai C S,Chuang L L,Chen Kuei-Chi.American so-ciety of mechanical engineers[J].Pressure Vesselsand Piping Division(Publication)PVP,1999,387:221-227.
[6]蔡崇兴.强化式加劲阻尼器与结构耐震补强之应用[J].土木技术,2001,4(8):55-67.Cai Chongxin.Application of RADAS retrofittingdamaged structures[J].Civil Engineering Tech-niques Journal,2001,4(8):55-67.(in Chinese)
[7]王亚勇,陈清祥.开孔式软钢阻尼器HADAS之抗震加固[M]∥防震减灾工程研究与进展.北京:科学出版社,2004.Wang Yayong,Cheng Qingxiang.Application of HA-DAS[M]∥Development of earthquake preventionand disaster reduction.Beijing:Science Press,2004.(in Chinese)
[8]Soong T T,Dargush G F.结构工程中的被动消能系统[M].董平,译.北京:科学出版社,2005.Song T T.Dargush G F.Passive energy dissipationsystem in structure[M].Dong Ping,Translated.Beijing:Science Press,2005.(in Chinese)
[9]中国建筑科学研究院结构研究所实验报告[R].建结(结构)字(2003)第004号,2003.
[10]蔡克铨.HADAS钢板消能器构架与构件性能试验报告[R].台湾省地震工程中心,2004.Tsai Keh-Cyuan.Testing Report of HADAS[R].Taiwan Earthquake Engineering Center,2004.
[11]蒋华戈,闫维明,李力,等.3000kN电液伺服阻尼器试验系统组成与应用[J].结构工程师,2011,27(1):22-26.Jiang Huage,Yan Weiming,Li Li,et al.Composingand application of the 3000 kN electric-hydraulic ser-vo damper testing system[J].Structural Engineers,2011,27(1):22-26.(in Chinese)
[12]中华人民共和国住房和城乡建设部.GB50010─2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.Ministry of Housing and Urban-Rural Development ofthe People’s Republic of China.GB 50010─2010Design code for concrete structures[S].Beijing:China Architecture&Building Press,2010.(in Chi-nese)
[13]王威,吕西林,徐崇恩.低屈服点钢在结构振动与控制中的应用研究[J].结构工程师,2007,23(6):83-88.Wang Wei,Lu Xilin,Xu Chongen.Engineering ap-plications of low yield point steel in structure vibrationcontrol[J].Structural Engineers,2007,23(6):83-88.(in Chinese)
[14]宋凤明,温东辉,李自刚,等.低屈服点钢的发展及应用[J].热加工工艺,2008,37(6):85-88.Song Fengming,Wen Donghui,Li Zigang,et al.Ap-plication and development of low yield point steel[J].Hot Working Technology,2008,37(6):85-88.(in Chinese)
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