单层球面网壳与支承结构整体强震失效特征
|
摘要
为了研究支承结构对单层球面网壳在强震作用下失效特征的影响,建立了更为精细化的数值模型.采用动力荷载域全过程分析方法研究了单层球面网壳与支承结构整体在强震作用下的特征响应,得到了考虑下部支承结构的单层球面网壳在强震作用下两种不同的失效特征,并建立了网壳结构极限承载力的判别准则,研究了下部支承结构、矢跨比、屋面质量等参数对网壳结构在强震作用下动力响应的影响.结果表明:下部支承对网壳结构在强震作用下的失效特征有显著的影响;随网壳矢跨比和屋面质量减小,结构的极限承载力显著提高,并且塑性程度加深,延性增强.
In order to investigate the influence of substructures on the failure behavior of steel reticulated domes subjected to severe earthquake,this paper built a more accurate numerical model.Applied on the fullrange dynamic response analysis method,two typical failure modes of reticulated domes with substructures were illustrated according to the rigidity of substructures.A Failure criterion was proposed to estimate the ultimate load of the single layer reticulated dome.It is observed that reticulated domes with rigid and flexible substructures have higher ultimate load compared with those with medium rigidity of substructures.The ultimate load increases with the decrease of the rise-span ratio and roof load.
In order to investigate the influence of substructures on the failure behavior of steel reticulated domes subjected to severe earthquake,this paper built a more accurate numerical model.Applied on the fullrange dynamic response analysis method,two typical failure modes of reticulated domes with substructures were illustrated according to the rigidity of substructures.A Failure criterion was proposed to estimate the ultimate load of the single layer reticulated dome.It is observed that reticulated domes with rigid and flexible substructures have higher ultimate load compared with those with medium rigidity of substructures.The ultimate load increases with the decrease of the rise-span ratio and roof load.
引文
[1]MOKOWSKI Z S.Space structures-a review of the de-velopments within the last decade[C]//The fourth in-ternational conference on space structures.Guildford,UK:University of Surrey,1993:1-8.
[2]SHEN Shizhao.Recent advances on the fundamental re-search of spatial structures in China[J].Journal of the International Association for Shell and Spatial Struc-tures,2006,47(2):93-100.
[3]BORRI C,SPINELLI P.Buckling and post-buckling behavior of single layer reticulated shells affected by ran-dom imperfections[J].Computers&Structures,1988,30:937-943.
[4]FORMAN S E,HUTCHINSON J W.Buckling of reticu-lated shell structures[J].International Journal of Solids and Structures,1970,6:909-932.
[5]KATO S,UEKI T,MUKAIYAMA Y.Study of dynamic collapse of single layer reticular dome subjected to earth-quake motion and the estimation of statically equivalent seismic forces[J].International Journal of Space Struc-tures,1997,12(3-4):191-204.
[6]WANG Bingbing,LI Yingyue.A theoretical study of su-per-span latticed shells[J].Journal of Constructional Steel Research,1999,51:287-296.
[7]范峰,钱宏亮,邢佶慧.强震作用下球面网壳动力强度破坏研究[J].哈尔滨工业大学学报,2004,36(6):722-725.
[8]邢佶慧,柳旭东,范峰.单层柱面网壳结构地震模拟振动台试验研究[J].建筑结构学报,2004,25(6):1-8.
[9]ZHI Xudong,FAN Feng,SHEN Shizhao.Failure mech-anisms of single layer reticulated domes subjected to earthquake[J].Journal of the International Association for Shell and Spatial Structures,2007,48(1):29-44.
[10]支旭东,范峰,沈世钊.材料损伤累积在网壳强震失效研究中的应用[J].哈尔滨工业大学学报.2008,40(2):169-173.
[11]SHIBATA A S.Substitute structure method for seismic in design in R.C.[J].Proc ASCE,1976,5:102.
[2]SHEN Shizhao.Recent advances on the fundamental re-search of spatial structures in China[J].Journal of the International Association for Shell and Spatial Struc-tures,2006,47(2):93-100.
[3]BORRI C,SPINELLI P.Buckling and post-buckling behavior of single layer reticulated shells affected by ran-dom imperfections[J].Computers&Structures,1988,30:937-943.
[4]FORMAN S E,HUTCHINSON J W.Buckling of reticu-lated shell structures[J].International Journal of Solids and Structures,1970,6:909-932.
[5]KATO S,UEKI T,MUKAIYAMA Y.Study of dynamic collapse of single layer reticular dome subjected to earth-quake motion and the estimation of statically equivalent seismic forces[J].International Journal of Space Struc-tures,1997,12(3-4):191-204.
[6]WANG Bingbing,LI Yingyue.A theoretical study of su-per-span latticed shells[J].Journal of Constructional Steel Research,1999,51:287-296.
[7]范峰,钱宏亮,邢佶慧.强震作用下球面网壳动力强度破坏研究[J].哈尔滨工业大学学报,2004,36(6):722-725.
[8]邢佶慧,柳旭东,范峰.单层柱面网壳结构地震模拟振动台试验研究[J].建筑结构学报,2004,25(6):1-8.
[9]ZHI Xudong,FAN Feng,SHEN Shizhao.Failure mech-anisms of single layer reticulated domes subjected to earthquake[J].Journal of the International Association for Shell and Spatial Structures,2007,48(1):29-44.
[10]支旭东,范峰,沈世钊.材料损伤累积在网壳强震失效研究中的应用[J].哈尔滨工业大学学报.2008,40(2):169-173.
[11]SHIBATA A S.Substitute structure method for seismic in design in R.C.[J].Proc ASCE,1976,5:102.
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