多向低屈服点钢隔震耗能支座开发与研究
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摘要
基于目前低屈服点钢主要是作为耗能器(阻尼器)应用于上部结构的耗能减震,尝试设计了一种受力清晰、构造合理的多向低屈服点钢隔震耗能器支座,并对其进行初步的理论、试验研究和软件分析,为低屈服点钢隔震耗能支座的研制与应用开展一些有益的探索。对国产低屈服点钢进行了拉伸性能试验,得到了材料的屈服强度和延性。根据试验结果,通过ANSYS有限元程序对多向低屈服点钢隔震耗能支座模型进行了低周反复荷载作用下的多参数化验证性分析。结果表明:多向低屈服点钢隔震耗能支座具有较低的屈服点,较大的延性和耗能能力。通过不同的参数对比得到,随着支座腹板高厚比的减小、高宽比的增大,支座的耗能能力增强,等效阻尼比较大。
Nowadays low yield point steel is mainly used for seismic energy dissipation in upper structure as dampers.But it's necessary to design multidirectional low yield point steel isolation bearing as simple,reasonable structure.And preliminary theoretical studies,experimental studies for the bearing are also worthy.Based on the tensibility experiment of low yield point steel,the yield strength,ductility of the steel were obtained.With the results of the experiment,multi-parametric analysis of low cycled reversed loading to the multidirectional low yield point steel isolation bearing was also carried with ANSYS finite element program.The results indicate that the bearing has low yield points,high ductility and good energy dissipation capacity.Comparing with different parameters,with the decreases of the height and thickness ratio of webs and the height and width ratio of webs,the energy dissipation capacity is increased.
Nowadays low yield point steel is mainly used for seismic energy dissipation in upper structure as dampers.But it's necessary to design multidirectional low yield point steel isolation bearing as simple,reasonable structure.And preliminary theoretical studies,experimental studies for the bearing are also worthy.Based on the tensibility experiment of low yield point steel,the yield strength,ductility of the steel were obtained.With the results of the experiment,multi-parametric analysis of low cycled reversed loading to the multidirectional low yield point steel isolation bearing was also carried with ANSYS finite element program.The results indicate that the bearing has low yield points,high ductility and good energy dissipation capacity.Comparing with different parameters,with the decreases of the height and thickness ratio of webs and the height and width ratio of webs,the energy dissipation capacity is increased.
引文
[1]刘文光,周福霖,庄学真,等.铅芯夹层橡胶隔震垫基本力学性能研究[J].地震工程与工程振动,1999,19(1):93-99.
[2]姚谦峰.自阻尼叠层橡胶隔震装置:中国,32888883[P].1998-02-04.
[3]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006.
[4]李钢,李宏男.新型软钢阻尼器的减震性能研究[R].大连理工大学海岸及近海工程国家重点实验室.2006.
[5]王亚勇,陈清祥.开孔式低屈服点钢阻尼器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.
[2]姚谦峰.自阻尼叠层橡胶隔震装置:中国,32888883[P].1998-02-04.
[3]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006.
[4]李钢,李宏男.新型软钢阻尼器的减震性能研究[R].大连理工大学海岸及近海工程国家重点实验室.2006.
[5]王亚勇,陈清祥.开孔式低屈服点钢阻尼器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.
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