双非平稳地震激励下巨子型有控结构振动控制研究
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摘要
利用特定震级、震源距下的强度-频率双非平稳地震加速度激励谱,结合虚拟激励法对巨子型有控结构(MSCSS)进行随机振动分析,并与工程中常用的强度调制非平稳地震激励下的工况进行比较,结果表明双非平稳激励研究更接近实际地震情况,此时结构的位移、加速度响应要更大,结构更易破坏。同时研究也证明了MSCSS较传统的巨型框架结构有更好的减震控制能力。讨论了MSCSS的结构构造参数,如巨子结构质量比、巨子结构相对刚度比、调频子结构的楼层数对整体结构减震效果的影响,在MSCSS进一步的设计研究中,可以根据计算结果合理分配这些参数,以使结构的控制效果达到最佳。
The pseudo excitation method is adopted to perform a random vibration analysis for MSCSS(Mega-Sub Controlled Structure System) under non-stationary seismic excitation for given earthquake magnitude and distance.When compared with amplitude non-stationary seismic excitation situation,it is shown that the non-stationary characteristics both in amplitude and frequency will increase the response of displacement and acceleration,which can lead to the structure destruction easily,and it is also numerically shown that MSCSS is better than traditional mega-frame in our vibration control.Furthermore,the relationships among dynamical parameters and MSCSS were investigated and simulation results show that the parameters(the number of sub-structure floors,mass ratio and stiffness ratio respectively between mega-structure and sub-structure) can be optimized to improve the vibration control capability.
The pseudo excitation method is adopted to perform a random vibration analysis for MSCSS(Mega-Sub Controlled Structure System) under non-stationary seismic excitation for given earthquake magnitude and distance.When compared with amplitude non-stationary seismic excitation situation,it is shown that the non-stationary characteristics both in amplitude and frequency will increase the response of displacement and acceleration,which can lead to the structure destruction easily,and it is also numerically shown that MSCSS is better than traditional mega-frame in our vibration control.Furthermore,the relationships among dynamical parameters and MSCSS were investigated and simulation results show that the parameters(the number of sub-structure floors,mass ratio and stiffness ratio respectively between mega-structure and sub-structure) can be optimized to improve the vibration control capability.
引文
[1]Feng M Q,Mita A.Vibration Control of Tall Buildings Using Mega-Sub Configuration.ASCE Journal of Engineering Mechan-ics,1995,121(10):1082-1087
[2]张洵安,周湘鄂,何官剑.一种新型结构体系在随机激励下的控制参数特性研究.西北工业大学学报,2007,25(2):306-310Zhang Xun'an,Zhou Xiang'e,He Guanjian.Characteristics of Control Parameters of a Particular PMSCSS Structural Configura-tion under Random Excitation.Journal of Northwestern Polytechnical University,2007,25(2):306-310(in Chinese)
[3]连业达,张洵安,王朝霞.巨、子结构质量比对新型有控建筑结构影响研究.振动与冲击,2007,26(8):112-115.Lian Yeda,Zhang Xun'an,Wang Zhaoxia.Investigation in New Building Structure with Different Mass Ratio between Mega-Structure and Sub-Structure.Journal of Vibration and Shock,2007,26(8):112-115(in Chinese)
[4]方同.工程随机振动.北京:国防工业出版社,1995,243-255Fang Tong.Engineering Random Vibration.National Defence Industry Press,1995,243-255(in Chinese)
[5]Lin J H,Zhang W S.Pseudo-Excitation Algorithm for Non-Stationary Random Seismic Responses.Engineering Structures,1994,16:270-276
[6]Daryl L,Logan,伍义生.有限元方法基础教程.北京:电子工业出版社,2003Daryl L,Logan,Wu Yisheng.A First Course in the Finite Element Method.Beijing:Publishing House of Electronics Industry,2003(in Chinese)
[7]吴昊,张洵安.非平稳地震激励下结构随机响应及动力可靠性研究.工业建筑,2012,9Wu Hao,Zhang Xun'an.The Random Response and Dynamic Reliability Analysis of Structure Subjected to Non-Stationary Seis-mic Excitation.Industrial Construction,2012,9(in Chinese)
[2]张洵安,周湘鄂,何官剑.一种新型结构体系在随机激励下的控制参数特性研究.西北工业大学学报,2007,25(2):306-310Zhang Xun'an,Zhou Xiang'e,He Guanjian.Characteristics of Control Parameters of a Particular PMSCSS Structural Configura-tion under Random Excitation.Journal of Northwestern Polytechnical University,2007,25(2):306-310(in Chinese)
[3]连业达,张洵安,王朝霞.巨、子结构质量比对新型有控建筑结构影响研究.振动与冲击,2007,26(8):112-115.Lian Yeda,Zhang Xun'an,Wang Zhaoxia.Investigation in New Building Structure with Different Mass Ratio between Mega-Structure and Sub-Structure.Journal of Vibration and Shock,2007,26(8):112-115(in Chinese)
[4]方同.工程随机振动.北京:国防工业出版社,1995,243-255Fang Tong.Engineering Random Vibration.National Defence Industry Press,1995,243-255(in Chinese)
[5]Lin J H,Zhang W S.Pseudo-Excitation Algorithm for Non-Stationary Random Seismic Responses.Engineering Structures,1994,16:270-276
[6]Daryl L,Logan,伍义生.有限元方法基础教程.北京:电子工业出版社,2003Daryl L,Logan,Wu Yisheng.A First Course in the Finite Element Method.Beijing:Publishing House of Electronics Industry,2003(in Chinese)
[7]吴昊,张洵安.非平稳地震激励下结构随机响应及动力可靠性研究.工业建筑,2012,9Wu Hao,Zhang Xun'an.The Random Response and Dynamic Reliability Analysis of Structure Subjected to Non-Stationary Seis-mic Excitation.Industrial Construction,2012,9(in Chinese)
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