正交正放单层鞍型网壳在强震下的失效研究
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摘要
对跨度40m正交正放单层鞍型网壳在强震作用下的失效机理进行研究。通过典型算例探讨结构在强震作用下的响应特征,考察结构的节点位移、不同屈服程度杆件比例、不同失效程度杆件等多项结构响应随荷载强度递增的变化规律;可认为单层鞍型网壳在强震下发生明显的动力强度破坏,综合结构的典型响应提出一种失效极限荷载的确定方法。在系统参数分析的基础上,讨论高跨比、屋面质量、初始缺陷等因素对结构失效极限荷载的影响规律,并讨论考虑下部支承结构刚度因素对上部鞍型网壳强震失效极限荷载、失效模式的影响规律。
The failure mechanism of orthogonal single-layer saddle-shape reticulated shells of 40m span subjected to severe earthquakes is studied.According to a typical example,the characteristic response of such structures under severe earthquakes is investigated,and the variations of the characteristic responses of displacement,element of different yielding ratios and element of different failure degrees with the load strength are investigated.It is concluded that single-layer saddle-shape reticulated shells under severe earthquakes are going through dynamic strength failure.A method is established for discrimination on the ultimate strength load based on the comprehension of various characteristic responses.The relationship between the variation of rise to span ratio,difference of roof mass together with geometric imperfections and ultimate load are discussed.The influence of supporting structures on the ultimate load and the failure mode is determined.
The failure mechanism of orthogonal single-layer saddle-shape reticulated shells of 40m span subjected to severe earthquakes is studied.According to a typical example,the characteristic response of such structures under severe earthquakes is investigated,and the variations of the characteristic responses of displacement,element of different yielding ratios and element of different failure degrees with the load strength are investigated.It is concluded that single-layer saddle-shape reticulated shells under severe earthquakes are going through dynamic strength failure.A method is established for discrimination on the ultimate strength load based on the comprehension of various characteristic responses.The relationship between the variation of rise to span ratio,difference of roof mass together with geometric imperfections and ultimate load are discussed.The influence of supporting structures on the ultimate load and the failure mode is determined.
引文
[1]Kato S,Ueki T,Mukaiyama Y.Study of dynamic collapseof single layer reticular domes subjected to earthquakemotion and the estimation of statically equivalent seismicforces[J].International Journal of Space Structures,1997,12(3):191-204
[2]Shen S Z.Recent advances on the fundamental research ofspatial structures in China[J].Journal of the InternationalAssociation for Shell and Spatial Structures,2006,47(2):93-100
[3]蓝天,张毅刚.大跨度屋盖结构抗震设计[M].北京:中国建筑工业出版社,2000
[4]Xue S D,Kato S,Takeuchi T,et al.A review on methodsof seismic response analysis of metal spatial structures[C]//Proceedings of the IASS-APCS.Beijing:ChinaAcademic Journal Electronic Publishing House,2006:428-429
[5]薛素铎,王健宁,曹资,等.钢网壳弹塑性地震反应分析[J].北京工业大学学报,2001,27(1):52-56(XueSuduo,Wang Jianning,Cao Zi,et al.Elastic-plasticseismic response analysis of lattice shells[J].Journal ofBeijing Polytechnic University,2001,27(1):52-56(inChinese))
[6]曹正罡,范峰.单层鞍型网壳的抗震性能分析[J].世界地震工程,2004,20(2):55-60(Cao Zhenggang,FanFeng.Analysis on seismic behavior of single-layer saddle-shape reticulated shells[J].World EarthquakeEngineering,20042,0(2):55-60(in Chinese))
[7]Mukai H,Wada A.Earthquake response analysis of an one-way long-span truss structure with consideration of memberbuckling[C]//Proceedings of the 4th International Conferenceon Computing in Civil and Building Engineering.Tokyo,1991:251-258
[8]Yamada S.Vibration behaviour of single-layer latticedcylindrical roofs[J].International Journal of SpaceStructures,19971,2(3/4):181-190
[9]Cao Zi.A study on seismic analysis method for spatiallatticed structures[C]//International Association for Shelland Spatial Structures Symposium.Beijing,2006:424-425
[10]JGJ 61—2003网壳结构技术规程[S].北京:中国建筑工业出版社,2003(JGJ 61—2003 Technical specificationfor latticed shells[S].Beijing:China Architecture&Building Press,2003)
[11]Kato S,Murata M.Dynamic elasto-plastic buckling simulationsystem for single layer reticular domes with semi-rigidconnections under multiple loadings[J.]International Journalof Space Structures,19971,2(3):161-172
[12]Fan F,Shen S Z.Study on the dynamic strength failure ofreticulated domes under severe earthquakes[C]//International Association for Shell and Spatial StructuresSymposium.Montpellier,France,2004:140-141
[13]史义博,支旭东,范峰,等.单层球面网壳在强震作用下的损伤模型[J].哈尔滨工业大学学报,2008,40(12):1874-1877(Shi Yibo,Zhi Xudong,Fan Feng,et al.Adamage model of single-layer reticulated domes undersevere earthquakes[J].Journal of Harbin Institute ofTechnology,20084,0(12):1874-1877(in Chinese))
[14]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,20082,5(6):770-775(Zhi Xudong,Wu Jinmei,Fan Feng,et al.Failure of single-layer reticulated cylindrical shellssubjected to earthquakes[J].Chinese Journal ofComputational Mechanics,2008,25(6):770-775(inChinese))
[15]Zuyan S,Bao D.An experiment-based cumulative damagemechanics model of steel under cyclic loading[J].Advances in Structural Engineering,1997,1(1):39-46
[16]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(Zhi Xudong,Fan Feng,Sheng Shizhao.Application of material damage cumulation in reticulatedshells under severe earthquakes[J].Journal of HarbinInstitute of Technology,2008,40(2):169-173(inChinese))
[17]曹资,薛素铎,王雪生,等.空间结构抗震分析中的地震波选取与阻尼比取值[J].空间结构,2008,14(3):3-8(Cao Zi,Xue Suduo,Wang Xuesheng,et al.Selection ofearthquake waves and values of damping ratio for spacestructures in aseismic analysis[J].Spatial Structures,20081,4(3):3-8(in Chinese))
[2]Shen S Z.Recent advances on the fundamental research ofspatial structures in China[J].Journal of the InternationalAssociation for Shell and Spatial Structures,2006,47(2):93-100
[3]蓝天,张毅刚.大跨度屋盖结构抗震设计[M].北京:中国建筑工业出版社,2000
[4]Xue S D,Kato S,Takeuchi T,et al.A review on methodsof seismic response analysis of metal spatial structures[C]//Proceedings of the IASS-APCS.Beijing:ChinaAcademic Journal Electronic Publishing House,2006:428-429
[5]薛素铎,王健宁,曹资,等.钢网壳弹塑性地震反应分析[J].北京工业大学学报,2001,27(1):52-56(XueSuduo,Wang Jianning,Cao Zi,et al.Elastic-plasticseismic response analysis of lattice shells[J].Journal ofBeijing Polytechnic University,2001,27(1):52-56(inChinese))
[6]曹正罡,范峰.单层鞍型网壳的抗震性能分析[J].世界地震工程,2004,20(2):55-60(Cao Zhenggang,FanFeng.Analysis on seismic behavior of single-layer saddle-shape reticulated shells[J].World EarthquakeEngineering,20042,0(2):55-60(in Chinese))
[7]Mukai H,Wada A.Earthquake response analysis of an one-way long-span truss structure with consideration of memberbuckling[C]//Proceedings of the 4th International Conferenceon Computing in Civil and Building Engineering.Tokyo,1991:251-258
[8]Yamada S.Vibration behaviour of single-layer latticedcylindrical roofs[J].International Journal of SpaceStructures,19971,2(3/4):181-190
[9]Cao Zi.A study on seismic analysis method for spatiallatticed structures[C]//International Association for Shelland Spatial Structures Symposium.Beijing,2006:424-425
[10]JGJ 61—2003网壳结构技术规程[S].北京:中国建筑工业出版社,2003(JGJ 61—2003 Technical specificationfor latticed shells[S].Beijing:China Architecture&Building Press,2003)
[11]Kato S,Murata M.Dynamic elasto-plastic buckling simulationsystem for single layer reticular domes with semi-rigidconnections under multiple loadings[J.]International Journalof Space Structures,19971,2(3):161-172
[12]Fan F,Shen S Z.Study on the dynamic strength failure ofreticulated domes under severe earthquakes[C]//International Association for Shell and Spatial StructuresSymposium.Montpellier,France,2004:140-141
[13]史义博,支旭东,范峰,等.单层球面网壳在强震作用下的损伤模型[J].哈尔滨工业大学学报,2008,40(12):1874-1877(Shi Yibo,Zhi Xudong,Fan Feng,et al.Adamage model of single-layer reticulated domes undersevere earthquakes[J].Journal of Harbin Institute ofTechnology,20084,0(12):1874-1877(in Chinese))
[14]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,20082,5(6):770-775(Zhi Xudong,Wu Jinmei,Fan Feng,et al.Failure of single-layer reticulated cylindrical shellssubjected to earthquakes[J].Chinese Journal ofComputational Mechanics,2008,25(6):770-775(inChinese))
[15]Zuyan S,Bao D.An experiment-based cumulative damagemechanics model of steel under cyclic loading[J].Advances in Structural Engineering,1997,1(1):39-46
[16]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(Zhi Xudong,Fan Feng,Sheng Shizhao.Application of material damage cumulation in reticulatedshells under severe earthquakes[J].Journal of HarbinInstitute of Technology,2008,40(2):169-173(inChinese))
[17]曹资,薛素铎,王雪生,等.空间结构抗震分析中的地震波选取与阻尼比取值[J].空间结构,2008,14(3):3-8(Cao Zi,Xue Suduo,Wang Xuesheng,et al.Selection ofearthquake waves and values of damping ratio for spacestructures in aseismic analysis[J].Spatial Structures,20081,4(3):3-8(in Chinese))
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