开孔对大跨度双层球面网壳结构多维地震反应的影响研究
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摘要
在考虑几何大变形和材料非线性的基础上,研究开孔对某煤仓顶部跨度为116.1m的双层球面网壳结构在单维和多维地震作用下的弹塑性地震响应的影响。结果表明:与单维地震作用下相比,多维地震作用下开孔结构的最大水平位移增大20.6%,杆件的最大轴应力增大19%;与El-Centro地震波作用下相比,在长周期地震波作用下,无孔和开孔结构的地震响应有明显增大的趋势,且开孔对网壳结构地震反应的影响更为显著;在多维地震作用下,相比于无孔结构,开孔结构的最大水平位移可增大14%,最大轴应力可增大7.6%,杆件的最大响应塑性率可增大15%。
Based on large geometric deformation and nonlinear of material theories,the seismic responses of a long-span double-layer spherical lattice shells with opening whose span is 116. 1m in Zhaoqing were studied,and the influence of opening in the lattice shells to the multiple earthquake excitations of structures was analyzed. The results show that the maximum displacement appeared in the quarter span of both structures under single-dimensional and multi-dimensional earthquake. Under multi-dimensional earthquake,the maximum displacement,the maximum axial stress of elements and the maximum plastic ratio of elements increased 14%,7. 6% and 15% respectively than those corresponding to the seismic responses of the structure without opening. Under multi-dimensional earthquake,the maximum displacement and the maximum axial stress of elements of the structure with opening increased 20. 6% and 19% respectively than those corresponding to under single-dimensional earthquake.
Based on large geometric deformation and nonlinear of material theories,the seismic responses of a long-span double-layer spherical lattice shells with opening whose span is 116. 1m in Zhaoqing were studied,and the influence of opening in the lattice shells to the multiple earthquake excitations of structures was analyzed. The results show that the maximum displacement appeared in the quarter span of both structures under single-dimensional and multi-dimensional earthquake. Under multi-dimensional earthquake,the maximum displacement,the maximum axial stress of elements and the maximum plastic ratio of elements increased 14%,7. 6% and 15% respectively than those corresponding to the seismic responses of the structure without opening. Under multi-dimensional earthquake,the maximum displacement and the maximum axial stress of elements of the structure with opening increased 20. 6% and 19% respectively than those corresponding to under single-dimensional earthquake.
引文
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[3]黄俊,戴绍斌,曾辉,等.中央开洞网架结构的静力与动力分析[J].武汉理工大学学报,2011,33(9):1-5(Huang Jun,Dai Shaobin,Zeng Hui,et al.Static and dynamic analysis of grid structure with central open hole[J].Journal of Wuhan University of Technology,2011,33(9):1-5(in Chinese))
[4]黄兴淮,徐赵东,杨明飞.多维地震下大跨网格结构倒塌分析与抗倒塌措施[J].东南大学学报:自然科学版,2012,42(1):109-113(Huang Xinghuai,Xu Zhaodong,Yang Mingfei.Collapse modes and anti-collapse measures for long span trusses under multi-dimensional earthquakes[J].Journal of Southeast University:Natural Science Edition,2012,42(1):109-113(in Chinese))
[5]杨志,韩庆华,周全智,等.多维多点激励下老山自行车馆屋盖结构的地震反应分析[J].天津大学学报,2007,40(11):1127-1283(Yang Zhi,Han Qinghua,Zhou Quanzhi,et al.Seismic response of the roof structure of Laoshan cycling gymnasium under multi-dimensional and multi-point excitation[J].Journal of Tianjin University,2007,40(11):1127-1283(in Chinese))
[6]王社良,张雪峰,朱军强,等.多维多点输入下压电智能网壳结构的动力稳定性分析[J].建筑与科学工程学报,2010,27(3):8-12(Wang Sheliang,Zhang Xuefeng,Zhu Junqiang,et al.Dynamic stability analysis of piezoelectric intelligent reticulated shell structures under multi-dimensional and multi-support excitations[J].Journal of Architecture and Civil Engineer,2010,27(3):8-12(in Chinese))
[7]赵立东.地震作用下大跨度煤仓双层球面网壳结构动力特性研究[D].北京:北京科技大学,2011
[8]GB 5009—2001建筑结构荷载规范[S].北京:中国建筑工业出版社,2006(GB 50009—2001 Load code for the design of building structures[S].Beijing:China Architectural&Building Press,2006(in Chinese))
[9]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB 50001—2010 Code for seismic design of building[S].Beijing:China Architectural&Building Press,2010(in Chinese))
[10]葛漢彬,日沖堅治,宇佐美勉.鋼アーチ橋に設置した座屈拘束ブレースの応答値[C]//土木学会地震工学論文集.日本,2005
[11]陈骥.钢结构稳定理论与设计[M].北京:科学出版社,2011
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