基于概率密度演化方法的随机MSCSS构造研究
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摘要
附加柱是巨子型有控结构体系(Mega-Sub Controlled Structure System,即MSCSS)中的关键因素,为了确定MSCSS的细部构造,本文对附加柱的连接方式进行了研究。针对四种附加柱的构造方案,利用切球选点方法,确定了91个不同材料参数及地震强度的随机工况,在此基础上进行了随机巨子型有控结构体系在随机激励下的动力特性分析;基于概率密度演化理论,对各种附加柱构造情况下MSCSS的位移、加速度、附加柱应力的均值和标准差进行对比,确定了最佳的附加柱构造方案。结果表明,释放MSCSS附加柱顶端的水平约束,可以有效地降低MSCSS的加速度、位移、附加柱应力响应,使MSCSS抗震性能的优越性得到充分的发挥。本文提出的MSCSS基本构造形式可为MSCSS的进一步深入研究提供依据。
The additional column is the key factor of the MSCSS(Mega-sub Controlled Structure System).The connection type between the additional column and the mega beam is investigated in order to perfect the MSCSS.Directing at four constructional schemes,ninety-one stochastic stations of the different material parameter and seismic strength are determined by employing the strategy of selecting points via sphere of contact.The dynamic characteristics of the stochastic MSCSS are investigated under these stochastic seismic excitations.The mean and standard deviation of the displacement,acceleration of the MSCSS,as well as the stress of the additional column for four constructional schemes are compared with each other based on the theory of probability density evolution.Then the optimal constructional scheme of the additional column is established.The result obtained shows that the displacement and acceleration responses of the MSCSS,together with the stress responses of the additional column can be reduced effectively when the horizontal restraint between the additional column and mega-beam is released.This construction method of the additional column can give full play to the excellent aseismatic ability of the MSCSS.The basic construction form is concluded and the result may lay a foundation for the further research of the MSCSS.
The additional column is the key factor of the MSCSS(Mega-sub Controlled Structure System).The connection type between the additional column and the mega beam is investigated in order to perfect the MSCSS.Directing at four constructional schemes,ninety-one stochastic stations of the different material parameter and seismic strength are determined by employing the strategy of selecting points via sphere of contact.The dynamic characteristics of the stochastic MSCSS are investigated under these stochastic seismic excitations.The mean and standard deviation of the displacement,acceleration of the MSCSS,as well as the stress of the additional column for four constructional schemes are compared with each other based on the theory of probability density evolution.Then the optimal constructional scheme of the additional column is established.The result obtained shows that the displacement and acceleration responses of the MSCSS,together with the stress responses of the additional column can be reduced effectively when the horizontal restraint between the additional column and mega-beam is released.This construction method of the additional column can give full play to the excellent aseismatic ability of the MSCSS.The basic construction form is concluded and the result may lay a foundation for the further research of the MSCSS.
引文
[1]张洵安,李涛,吴昊,等.强震作用下超高层建筑结构MSCSS的响应特性研究[J].防灾减灾工程学报,2010,30(S1):101-105.
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[5]Lian Y D,Zhang X A,Cherry S.Damping characteristics offriction damped braced frame and its effectiveness in the Mega-subcontrolled structure system[J].Earthquake Engineering andEngineering Vibration,2007,6(2):171-181.
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[12]陈建兵,李杰.随机结构反应概率密度演化分析的切球选点法[J].振动工程学报,2006,19(1):2-7.
[13]陈建兵,李杰.结构随机响应概率密度演化分析的数论选点法[J].力学学报,2006,38(1):134-139.
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[2]Feng M Q,Mita A.Vibration control of tall buildings usingMega-sub configuration[J].Journal of Engineering Mechanics,1995,121,10:1082-1087.
[3]Zhang X A,Zhang J L,Wang D,et al.Controlling characteristicpassive Mega-sub controlled frame subjected to random windloads[J].Journal of Engineering Mechanics,2005,131(10):1046-1055.
[4]Zhang X A,Wang D,Jiang J S.The controlling mechanism andthe controlling effectiveness of passive Mega-sub controlled framesubjected to random wind loads[J].Journal of Sound and Vibration,2005,283:543-560.
[5]Lian Y D,Zhang X A,Cherry S.Damping characteristics offriction damped braced frame and its effectiveness in the Mega-subcontrolled structure system[J].Earthquake Engineering andEngineering Vibration,2007,6(2):171-181.
[6]毕金凤,张洵安,连业达.附加柱对巨—子型控制结构的影响[J].河北建筑科技学院学报,2005,22(4):46-47.
[7]陈建兵,李杰.非线性随机地震响应的概率密度演化分析[J].武汉理工大学学报,2010,32(9):6-10.
[8]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.
[9]陈建兵,刘章军,李杰.非线性随机动力系统的概率密度演化分析[J].计算力学学报,2009,26(3):312-317.
[10]李杰.随机结构系统——分析与建模[M].北京:科学出版社,1996:1-4.
[11]陈建兵,李杰.非线性随机地震响应的概率密度演化分析[J].武汉理工大学学报,2010,32(9):6-10.
[12]陈建兵,李杰.随机结构反应概率密度演化分析的切球选点法[J].振动工程学报,2006,19(1):2-7.
[13]陈建兵,李杰.结构随机响应概率密度演化分析的数论选点法[J].力学学报,2006,38(1):134-139.
[14]中华人民共和国冶金工业部.GBJ17-88钢结构设计规范[S].北京:中国计划出版社,1989.
[15]中国建筑技术研究院.JGJ99-98高层民用建筑钢结构技术规程[S].北京:中国建筑工业出版社,1998.
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