强震作用下框架结构的优化设计
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
针对第三水准"大震不倒"的抗震设防目标,提出一种在强震作用下框架结构的优化设计方法。依据"用相同的投资获最好的设计"的设计理念,以在强烈地震波的作用下框架结构最大的层间相对位移最小化作为优化目标,建立了同时满足体积约束的优化数学模型。采用动力有限元分析模型和高效的显式动力分析方法进行结构分析,获得最大的层间相对位移;采用改进的复形法求解优化数学模型;在显式动力分析软件ANSYS/LS-DYNA的基础上进行二次开发,实现了一个三维框架结构的抗震优化设计。数值结果表明该设计方法不一定获得抗震结构的最优设计,但能获得一系列抗震性能良好的设计,具有现实的工程意义。
To aim at the third level seismic fortification target: not collapse in severe earthquake conditions,an optimal design method for spacial frame structures under the severe earthquake loading is performed.According to the design concept: get the best design with the same cost,the optimization mathematics model is established to minimize the maximal relative displacement between neighbor floors in building structure under severe earthquake loading,meanwhile,to satisfy the structural volume constraint.The model is solved with the improved complex method.At last,the 3-D seismic optimal design of a space frame is demonstrated by the second exploitation based on the explicit dynamic analysis soft ANSYS/LS-DYNA.The numerical value result indicates the design method not always achieve the optimum design of the seismic structures,but it can obtain a series of better seismic designs.So the optimal design method can be used in the practical engineering.
引文
[1]中华人民共和国国家标准.建筑抗震设计规范(GB 50011-2001).北京:中国建筑工业出版社,2001.
    [2]Yu-Yuan Lin.Statistical study on damping modifcation factors a-dopted in Taiwan's seismic isolation design code by using the 21September 1999 Chi-Chi earthquake,Taiwan[J].EngineeringStructures,2007,29:682-693.
    [3]杜永峰,李慧,程选生,等.隔震结构系列研究及在甘肃的工程应用[J].西北地震学报,2005,27(4):312-316.
    [4]李正良,汪之松,李正英,等.耗能减震结构的复模态矩阵摄动法[J].工程力学,2007,24(9):14-18.
    [5]李兴田,朱东生.连续梁桥中设置粘弹性阻尼器的减震效果分析[J].西北地震学报,2006,28(1):26-30.
    [6]ZHOUXing-de,CHENDao-zheng.Active vibration control of non-linear benchmark buildings[J].Applied mathematics and Mechan-ics(English Edition),2007,28(4):487-493.
    [7]张强,何玉敖.非线性土木结构振动控制的逆系统方法[J].地震工程与工程振动,2007,27(2):112-119.
    [8]MBogomolni,UKirsch,I Sheinman.Efficient design sensitivities ofstructure subjected to dynamic loading[J].International Journal ofSolids and Structures,2006,43:5485-5500.
    [9]Zarghamee M S.Optimum frequency of structures[J].JournalAIAA,1968,6(6):749-750.
    [10]陈建军,车建文,崔明涛,等.结构动力优化设计述评与展望[J].力学进展,2001,31(2):181-192.
    [11]王凌.智能优化算法及其应用[M].北京:清华大学出版社,2001:17-33.
    [12]Nikos D Lagaros,Michalis Fragiadakis,Manolis Papadrakakisa.Structural optimization:A tool for evaluating seismic design pro-cedures[J].Engineering Structures,2006,28:1623-1633.
    [13]王进廷,杜修力,张楚汉.瑞利阻尼介质有限元离散模型动力分析的数值稳定性[J].地震工程与工程振动,2002,22(6):18-24.
    [14]包世华.高层建筑结构计算[M].北京:高等教育出版社,1991:179-208.
    [15]丁彦慧,胡平,张杰.重大工程抗震设计中实际强震记录的选用研究[J].工程抗震与加固改造,2006,28(5):103-106+67.
    [16]Xiao-Kang Zou,Chun-Man Chan.An optimal resizing techniquefor seismic drift design of concrete buildings subjected to responsespectrum and time history loadings[J].Computers and Struc-tures,2005,83:1689-1704.
    [17]S Kaliszky,J L幃g幃.Optimal design of elasto-plastic structuressubjected to normal and extreme loads[J].Computers andStructures,2006,84:1770-1779.
    [18]朱伯芳,黎展眉,张璧成.结构优化原理与应用[M].北京:水利电力出版社,1984:220-228.

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