地震作用下单层柱面网壳倒塌机理分析与试验研究
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摘要
考虑材料的Bauschinger效应、杆件损伤累积效应、杆件失稳及失稳后性能以及杆件失效与杆件断裂等因素分析单层柱面网壳结构的倒塌机理,并进行了试验研究。结果表明,地震作用下单层柱面网壳结构倒塌破坏主要原因是靠近纵边支座的斜杆端部形成塑性铰数量过多,甚至局部形成机构,结构整体刚度显著降低,无法承担地震作用。试验较好地证明了理论分析所得结论的正确性。
This paper studies the collapse mechanism of single-layer cylindrical reticulated shells under earthquake action.The study considers the Bauschinger effect of material,the damage accumulation of members,the buckling and post-buckling behavior of members,and the failure and fracture of members.An experimental investigation is also conducted.The results show that the seismic collapse mechanism of the investigated structure is mainly due to the excessive plastic hinges occurring at the ends of diagonal members near supports.The occurrence of these hinges even causes unconstrained deformation of some local regions,and the overall structural stiffness is significantly reduced.Finally,the structure collapses,because it fails to bear the earthquake loads.The experimental results also confirm the correctness of the theoretical analysis.
This paper studies the collapse mechanism of single-layer cylindrical reticulated shells under earthquake action.The study considers the Bauschinger effect of material,the damage accumulation of members,the buckling and post-buckling behavior of members,and the failure and fracture of members.An experimental investigation is also conducted.The results show that the seismic collapse mechanism of the investigated structure is mainly due to the excessive plastic hinges occurring at the ends of diagonal members near supports.The occurrence of these hinges even causes unconstrained deformation of some local regions,and the overall structural stiffness is significantly reduced.Finally,the structure collapses,because it fails to bear the earthquake loads.The experimental results also confirm the correctness of the theoretical analysis.
引文
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[4]支旭东,范峰,沈世钊.强震下单层柱面网壳损伤及失效机理研究[J].土木工程学报,2007,40(8):29-34.ZHI Xudong,FAN Feng,SHEN Shizhao.Failure and damage of single-layer reticulated cylindrical shells under earthquakes[J].China Civil En-gineering Journal,2007,40(8):29-34.(in Chinese)
[5]齐麟.强震作用下单层网壳结构动力破坏机理[D].天津:天津大学,2011.QI Lin.Dynamic damage mechanism of singer-layer reticulated shells under severe earthquake[D].Tianjin:Tianjin University,2011.(in Chi-nese)
[6]支旭东,吴金妹,范峰,等.考虑材料损伤累积单层柱面网壳在强震下的失效研究[J].计算力学学报,2008,25(6):770-775.ZHI Xudong,WU Jinmei,Fan Feng,et al.Failure of single-layer reticulated cylindrical shells subjected to earthquakes[J].Chinese Journal ofComputatioal Michanics,2008,25(6):770-775.(in Chinese)
[7]支旭东,聂桂波,范峰,等.大跨度单层球面网壳的损伤模型及强震失效[J].哈尔滨工业大学学报,2009,41(8):6-11.ZHI Xudong,NIE Guibo,FAN Feng,et al.Damage model and failure mechanism of long-span single-layer reticulated domes under earthquake[J].Journal of Harbin Institute of Technology,2009,41(8):6-11.(in Chinese)
[8]吴金妹.基于损伤的单层柱面网壳强震失效机理研究[D].哈尔滨:哈尔滨工业大学,2007.WU Jinmei.Failure mechanism of single-layer reticulated domes under severe earthquake based on damage[D].Harbin:Harbin Institute of Tech-nology,2007.(in Chinese)
[9]YU Xiaoye,FAN Feng,ZHI Xudong,et al.Damage mechanism of single-layer reticulated domes under severe earthquakes[J].Journal of HarbinInstitute of Technology,2009,16(1):121-130.(in Chinese)
[10]范峰,支旭东,沈世钊.大跨度网壳结构强震失效机理研究[J].建筑结构学报,2010,31(6):153-158.FAN Feng,ZHI Xudong,SHEN Shizhao.Failure mechanism of large span reticulated shells subjected to severe earthquakes[J].Journal of Build-ing Structures,2010,31(6):153-158.(in Chinese)
[11]聂桂波,范峰,支旭东.基于精细化本构的单层柱面网壳强震失效机理研究[J].土木工程学报,2012,45(增刊):30-35.NIE Guibo,FAN Feng,ZHI Xudong.Study on the failure mechanism of single-layer cylindrical shell under seismic motion based on refined consti-tutive mode[J].Harbin Institute of Technology,2012,45(supplement):30-35.(in Chinese)
[12]丁阳,葛金刚,李忠献.考虑损伤累积及杆件失稳效应的网壳结构极限承载力分析[J].工程力学,2012,29(5):13-18.DING Yang,GE Jingang,LI Zhongxian.Analysis on ultimate bearing capacity of reticulated shell considering cumulative damage and instability ofmember[J].Engineering Mechanics,2012,29(5):13-18.(in Chinese)
[2]Kato S,Ueki T,Mukaiyama Y.Study of dynamic collapse of single layer reticular domes subjected to earthquake motion and the estimation of stati-cally equivalent seismic forces[J].International Journal of Space Structures,1997,12(3/4):191-204.
[3]支旭东,范峰,沈世钊.凯威特型单层球面网壳在强震下的失效研究[J].工程力学,2008,25(9):7-12.ZHI Xudong,FAN Feng,SHEN Shizhao.Seismic failure of single-layer reticulated domes[J].Engineering Mechanics,2008,25(9):7-12.(in Chinese)
[4]支旭东,范峰,沈世钊.强震下单层柱面网壳损伤及失效机理研究[J].土木工程学报,2007,40(8):29-34.ZHI Xudong,FAN Feng,SHEN Shizhao.Failure and damage of single-layer reticulated cylindrical shells under earthquakes[J].China Civil En-gineering Journal,2007,40(8):29-34.(in Chinese)
[5]齐麟.强震作用下单层网壳结构动力破坏机理[D].天津:天津大学,2011.QI Lin.Dynamic damage mechanism of singer-layer reticulated shells under severe earthquake[D].Tianjin:Tianjin University,2011.(in Chi-nese)
[6]支旭东,吴金妹,范峰,等.考虑材料损伤累积单层柱面网壳在强震下的失效研究[J].计算力学学报,2008,25(6):770-775.ZHI Xudong,WU Jinmei,Fan Feng,et al.Failure of single-layer reticulated cylindrical shells subjected to earthquakes[J].Chinese Journal ofComputatioal Michanics,2008,25(6):770-775.(in Chinese)
[7]支旭东,聂桂波,范峰,等.大跨度单层球面网壳的损伤模型及强震失效[J].哈尔滨工业大学学报,2009,41(8):6-11.ZHI Xudong,NIE Guibo,FAN Feng,et al.Damage model and failure mechanism of long-span single-layer reticulated domes under earthquake[J].Journal of Harbin Institute of Technology,2009,41(8):6-11.(in Chinese)
[8]吴金妹.基于损伤的单层柱面网壳强震失效机理研究[D].哈尔滨:哈尔滨工业大学,2007.WU Jinmei.Failure mechanism of single-layer reticulated domes under severe earthquake based on damage[D].Harbin:Harbin Institute of Tech-nology,2007.(in Chinese)
[9]YU Xiaoye,FAN Feng,ZHI Xudong,et al.Damage mechanism of single-layer reticulated domes under severe earthquakes[J].Journal of HarbinInstitute of Technology,2009,16(1):121-130.(in Chinese)
[10]范峰,支旭东,沈世钊.大跨度网壳结构强震失效机理研究[J].建筑结构学报,2010,31(6):153-158.FAN Feng,ZHI Xudong,SHEN Shizhao.Failure mechanism of large span reticulated shells subjected to severe earthquakes[J].Journal of Build-ing Structures,2010,31(6):153-158.(in Chinese)
[11]聂桂波,范峰,支旭东.基于精细化本构的单层柱面网壳强震失效机理研究[J].土木工程学报,2012,45(增刊):30-35.NIE Guibo,FAN Feng,ZHI Xudong.Study on the failure mechanism of single-layer cylindrical shell under seismic motion based on refined consti-tutive mode[J].Harbin Institute of Technology,2012,45(supplement):30-35.(in Chinese)
[12]丁阳,葛金刚,李忠献.考虑损伤累积及杆件失稳效应的网壳结构极限承载力分析[J].工程力学,2012,29(5):13-18.DING Yang,GE Jingang,LI Zhongxian.Analysis on ultimate bearing capacity of reticulated shell considering cumulative damage and instability ofmember[J].Engineering Mechanics,2012,29(5):13-18.(in Chinese)
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