动力机器基础振动与设计若干问题的讨论
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摘要
讨论了《动力机器基础设计规范》(GB 50040-96)中的若干问题,包括质-弹-阻模型、地基动力参数、荷载组合和基础的构造要求等几个方面。对动力响应,基于弹性半空间理论定义质-弹-阻模型中引入的各个参数(频变),基于该模型计算稳态荷载或暂态荷载作用下基础的动力响应;引入承载力、变形和稳定性等的验算,并在基础的形状尺寸、埋深、材料、配筋等构造方面为设计人员提供指导;对基础的重要程度进行分类,对重要基础,特殊场地条件下的基础,建造时宜考虑沉降等观测手段,及可改变基础固有特性和加固维修等相关的措施。
Some discussions on Code for Dynamic Machine Foundation Design(GB 50040-96) are had,including mass-spring-damper model,dynamic foundation parameters,load combination and structural requirements.Frequency-dependent parameters may be defined for the mass-spring-damper model to calculate the dynamic responses to steady and transient loads.Foundation bearing capacity,deformation and stability verifications should be introduced into the static design.And the structural requirements of foundation shape,size,embedded depth,material and reinforcement should be prescribed to guide the design.The important degree of a machine foundation should be classified to take different measures for the foundation settlement observation and the possibility of changing foundation natural characteristics,reinforcement and repairing after construction.
Some discussions on Code for Dynamic Machine Foundation Design(GB 50040-96) are had,including mass-spring-damper model,dynamic foundation parameters,load combination and structural requirements.Frequency-dependent parameters may be defined for the mass-spring-damper model to calculate the dynamic responses to steady and transient loads.Foundation bearing capacity,deformation and stability verifications should be introduced into the static design.And the structural requirements of foundation shape,size,embedded depth,material and reinforcement should be prescribed to guide the design.The important degree of a machine foundation should be classified to take different measures for the foundation settlement observation and the possibility of changing foundation natural characteristics,reinforcement and repairing after construction.
引文
[1]GB 50040-96动力机器基础设计规范[S].
[2]一机部研究总院.动力机器基础设计手册[M].北京:中国建筑工业出版社,1981.
[3]George G.Analysis of machine foundation vibration:state of the art[J].Soil Dynamics and Earthquake Engineering,1983,2(1)∶2-42.
[4]王锡康.动力机器基础振动学科在我国的发展及需研究的若干问题[J].工业建筑,2007,37(6)∶83-90.
[5]陆顺永.用动力测量值确定基础-地基系统的频变参数[J].地震工程与工程振动,1996,16(4):30-36.
[6]王振宇,刘晶波,裴欲晓,等.大型动力机器基础防微振计算理论与实测研究[J].岩土工程学报,2002,24(3)∶363-366.
[7]Wolf J P,Somini D R.Approximate dynamic models of embedded foundations in time domain[J].Earthquake Engineering and Structure Dynam-ics,1986,14∶683-703.
[8]Meek J W,Veletsos A S.Simple models for foundations in lateral and rocking motion[C]∥Proceedings of 5thWorld Conference on EarthquakeEngineering,Rome,1973,2:2610-2613.
[9]Barros F,DE C P,Luco J E.Discrete models for vertical of surface and embedded foundations[J].Earthquake Engineering and Structure Dynam-ics,1990,19∶289-303
[10]Wolf J P.Consistent lumped-parameter models for unbounded soil:physical representation[J].Earthquake Engineering and Structure Dynam-ics,1991,20:11-32.
[11]栾茂田,林皋.地基动力阻抗的双自由度集总参数模型[J].大连理工大学学报,1996,36(4)∶477-482.
[12]廖振鹏著.工程波动理论导论[M].北京:科学出版社,2002.
[13]廖振鹏.近场波动的数值模拟[J].力学进展,1997.27(2)∶193-216.
[14]王幼青,张克绪,朱腾明.动力机器基础与地基体系分析[J].哈尔滨建筑大学学报,1999,32(3)∶43-47.
[15]王锡康.对地基动刚度及惯性作用的研究[J].岩土工程学报,1984(7)∶75-85.
[16]GB 50007-2002建筑地基基础设计规范[S].
[2]一机部研究总院.动力机器基础设计手册[M].北京:中国建筑工业出版社,1981.
[3]George G.Analysis of machine foundation vibration:state of the art[J].Soil Dynamics and Earthquake Engineering,1983,2(1)∶2-42.
[4]王锡康.动力机器基础振动学科在我国的发展及需研究的若干问题[J].工业建筑,2007,37(6)∶83-90.
[5]陆顺永.用动力测量值确定基础-地基系统的频变参数[J].地震工程与工程振动,1996,16(4):30-36.
[6]王振宇,刘晶波,裴欲晓,等.大型动力机器基础防微振计算理论与实测研究[J].岩土工程学报,2002,24(3)∶363-366.
[7]Wolf J P,Somini D R.Approximate dynamic models of embedded foundations in time domain[J].Earthquake Engineering and Structure Dynam-ics,1986,14∶683-703.
[8]Meek J W,Veletsos A S.Simple models for foundations in lateral and rocking motion[C]∥Proceedings of 5thWorld Conference on EarthquakeEngineering,Rome,1973,2:2610-2613.
[9]Barros F,DE C P,Luco J E.Discrete models for vertical of surface and embedded foundations[J].Earthquake Engineering and Structure Dynam-ics,1990,19∶289-303
[10]Wolf J P.Consistent lumped-parameter models for unbounded soil:physical representation[J].Earthquake Engineering and Structure Dynam-ics,1991,20:11-32.
[11]栾茂田,林皋.地基动力阻抗的双自由度集总参数模型[J].大连理工大学学报,1996,36(4)∶477-482.
[12]廖振鹏著.工程波动理论导论[M].北京:科学出版社,2002.
[13]廖振鹏.近场波动的数值模拟[J].力学进展,1997.27(2)∶193-216.
[14]王幼青,张克绪,朱腾明.动力机器基础与地基体系分析[J].哈尔滨建筑大学学报,1999,32(3)∶43-47.
[15]王锡康.对地基动刚度及惯性作用的研究[J].岩土工程学报,1984(7)∶75-85.
[16]GB 50007-2002建筑地基基础设计规范[S].
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