墙式铅阻尼器在剪力墙结构抗震加固中的应用研究
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摘要
就布设位置和方式而言,墙式铅阻尼器比较适用于剪力墙结构的抗震加固,但其对剪力墙结构的减震效果及对与之相连的墙肢和连梁的影响尚有待研究。本文对该阻尼器布设在双肢剪力墙洞口时,阻尼器对双肢剪力墙和连梁产生的附加弯矩进行了理论研究,并给出了连梁附加弯矩计算公式。结合实际剪力墙结构的加固工程,利用SAP2000有限元软件分析了墙式铅阻尼器应用于剪力墙结构的减震效果。数值模拟分析结果表明:墙式铅阻尼器对剪力墙结构有较好的减震效果,同时该种阻尼器不会对与之相连的墙肢产生不利影响,但使与其连接连梁的弯矩增大,进行抗震加固设计时应该适当考虑。
Due to the advantages of flexible arrangement,wall lead dampers are highly suitable for shear wall structure seismic retrofitting. However,the influences on the beams and walls that connected to them are unknown. In the paper,formulas of the additional moments of a coupled shear wall and the coupling beams of different spans,in the condition that the additional wall type dampers reached their limit yield strengths,are derived. Furthermore,combined with engineering reinforcement projects of actual shear wall structure,contrast analysis of typical coupling wall column and coupling beam is conducted. The results show that employing wall lead dampers in suspension design would not bring negative influences to the wall limbs but increase the design moments of coupling beams,which should be properly taken in consideration in design process.
Due to the advantages of flexible arrangement,wall lead dampers are highly suitable for shear wall structure seismic retrofitting. However,the influences on the beams and walls that connected to them are unknown. In the paper,formulas of the additional moments of a coupled shear wall and the coupling beams of different spans,in the condition that the additional wall type dampers reached their limit yield strengths,are derived. Furthermore,combined with engineering reinforcement projects of actual shear wall structure,contrast analysis of typical coupling wall column and coupling beam is conducted. The results show that employing wall lead dampers in suspension design would not bring negative influences to the wall limbs but increase the design moments of coupling beams,which should be properly taken in consideration in design process.
引文
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[3]HANSION RD,SOONG T T.Seismic design with supplemental energy dissipation devi[M].Earthquake Engineering Research Institute,2001.
[4]周锡元,闫维明,杨润林.建筑结构的隔震、减振和振动控制[J].建筑结构学报,2002,23(2):2-12.ZHOU Xiyuan,YAN Weiming,YANG Runlin.Seismic base isolation,energy dissipation and vibration control of building structures[J].Journal of Building Structures,2002,23(2):2-12.(in Chinese)
[5]李爱群.工程结构减震控制[M].北京:机械工业出版社,2007.
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[8]包世华.新编高层建筑结构[M].北京:中国水利水电出版社,2001.
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