汽轮发电机组弹簧隔振基础模型试验研究——拟动力地震试验
|
摘要
对于汽轮发电机组弹簧隔振基础模型的拟动力地震试验研究目前在我国以至国际上均是首例,本项研究以实际工程为背景,进行1∶10模型的拟动力地震试验.在此次试验中按照模型试验的理论成功地考虑了地震加速度的放大效应,并通过试验可知,该基础在7°罕遇地震作用下,基础仍基本保持弹性工作状态;在7°多遇及罕遇地震作用下,隔振弹簧与顶板、柱顶通过防滑垫的连接,不会产生滑移现象;在多遇及罕遇地震作用时,结构各处的层间位移角均小于《建筑抗震设计规范》中规定的层间位移角限值;阻尼比越大,耗能能力越强,从各个方面均能提高结构的抗震性能;多遇地震时放大系数仅为1.33;罕遇地震时加速度的放大系数仅为1.18.
So far,the pseudo-dynamic seismic study on model test of spring vibration isolated turbogenerator foundation is the first case at home and abroad.This research is set in actual engineering,studied by building a 1:10 model of the pseudo-dynamic earthquake test.Through the theory of the model test,the amplification effect of earthquake acceleration is successfully considered during this test.Some conclusions are drawn as follows.The foundation performs well under 7 degree rarely met earthquake,and keeps in the elastic state basically.Under 7 degree the usual and rarely met earthquake,the spring which connects with roof and column by non-slip mat will not produce slipping phenomena.Story drift of structure is satisfied the limit value provided by Code for Seismic Design of Buildings.As is known,damping ratio is proportional to energy-dissipating capacity.The aseismic capability will be improved from all aspects.The aseismic factor of earthquake acceleration is only 1.33 under the usual met earthquake;and only 1.18 under the rare met earthquake.
So far,the pseudo-dynamic seismic study on model test of spring vibration isolated turbogenerator foundation is the first case at home and abroad.This research is set in actual engineering,studied by building a 1:10 model of the pseudo-dynamic earthquake test.Through the theory of the model test,the amplification effect of earthquake acceleration is successfully considered during this test.Some conclusions are drawn as follows.The foundation performs well under 7 degree rarely met earthquake,and keeps in the elastic state basically.Under 7 degree the usual and rarely met earthquake,the spring which connects with roof and column by non-slip mat will not produce slipping phenomena.Story drift of structure is satisfied the limit value provided by Code for Seismic Design of Buildings.As is known,damping ratio is proportional to energy-dissipating capacity.The aseismic capability will be improved from all aspects.The aseismic factor of earthquake acceleration is only 1.33 under the usual met earthquake;and only 1.18 under the rare met earthquake.
引文
[1]GB50040-96动力机器基础设计规范[S].北京:中国计划出版社,1997.
[2]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[3]JGJ101-96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.
[4]GB50267-97核电厂抗震设计规范[S].北京:中国计划出版社,1998.
[5]Siemens.汽机基础动力分析技术报告[R].
[6]胡聿贤著.地震工程学[M].第2版.北京:地震出版社,2005.
[7]宋彧,段敬民.建筑结构试验与检验[M].北京:人民交通出版社,2005.
[8]邱法维,钱稼茹,陈志鹏.结构抗震实验方法[M].北京:科学出版社,2000.
[2]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[3]JGJ101-96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.
[4]GB50267-97核电厂抗震设计规范[S].北京:中国计划出版社,1998.
[5]Siemens.汽机基础动力分析技术报告[R].
[6]胡聿贤著.地震工程学[M].第2版.北京:地震出版社,2005.
[7]宋彧,段敬民.建筑结构试验与检验[M].北京:人民交通出版社,2005.
[8]邱法维,钱稼茹,陈志鹏.结构抗震实验方法[M].北京:科学出版社,2000.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心