地下大断面薄钢结构地震响应的试验研究及数值分析
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摘要
为明确地下大断面薄钢结构的安全实用性,进行1/16大断面薄钢结构的系列模型振动试验、实际规模结构的现场试验和有限元分析。在把握作用于模型的地震动土压力及结构的应变状况的基础上,对施工过程中结构的响应特性及土压力的变化等进行研究。明确地下大断面薄钢结构的地震及施工时的安全性,为今后大断面薄钢结构的设计、施工提供依据。
In order to clarify the dynamic and static stabilities of embedded large-span corrugated steel culverts,a series of scaled-model shaking table tests(two different types of 1/16-scaled models of the corrugated culvert),the field tests of the proto-type models and simulation analyses using finite element method were performed.The dynamic behaviors and the seismic stability due to strong earthquakes like Hyogoken-Nanbu Earthquake happened in 1995,the stability of the embedded corrugated steel culverts during execution were evaluated.According to these studies,the dynamic strains of the embedded culvert models and the seismic soil pressure acting on the models due to sinusoidal and random strong motions were investigated.The static responses,strains of the models,and the static soil pressure acting on the models were evaluated,too.From this study,it was verified that the corrugated culvert model was subjected to dynamic horizontal forces(lateral seismic soil pressure) from the surrounding ground,which caused the large bending strains against the structure.And the structures did not exceed the allowable plastic deformation and did not collapse completely due to the strong earthquake motions like Hyogoken-Nanbu Earthquake,so was it during the execution process.The results obtained are useful for design,construction of the embedded large-span corrugated steel culverts.
In order to clarify the dynamic and static stabilities of embedded large-span corrugated steel culverts,a series of scaled-model shaking table tests(two different types of 1/16-scaled models of the corrugated culvert),the field tests of the proto-type models and simulation analyses using finite element method were performed.The dynamic behaviors and the seismic stability due to strong earthquakes like Hyogoken-Nanbu Earthquake happened in 1995,the stability of the embedded corrugated steel culverts during execution were evaluated.According to these studies,the dynamic strains of the embedded culvert models and the seismic soil pressure acting on the models due to sinusoidal and random strong motions were investigated.The static responses,strains of the models,and the static soil pressure acting on the models were evaluated,too.From this study,it was verified that the corrugated culvert model was subjected to dynamic horizontal forces(lateral seismic soil pressure) from the surrounding ground,which caused the large bending strains against the structure.And the structures did not exceed the allowable plastic deformation and did not collapse completely due to the strong earthquake motions like Hyogoken-Nanbu Earthquake,so was it during the execution process.The results obtained are useful for design,construction of the embedded large-span corrugated steel culverts.
引文
[1]潘昌实.隧道地震灾害综述[J].隧道及地下工程,1990,11(2):
1-9.(Pan Changshi.Overview of tunnel seismic disaster[J].Tunnel and Underground Engineering,1990,11(2):1-9.(in Chinese))
[2]林皋,梁青槐.地下结构的抗震设计[J].土木工程学报,1996,29(1):15-24.(Lin Gao,Liang Qinghuai.A seismic design of underground structures[J].China Civil Engineering Journal,1996,29(1):15-24.(in Chinese))
[3]Japanese Geotechnical Society.Damage to Daikai subway station[A].In:Special Issue of Soils and Foundations[C].Japan:[s.n.],1996.283-300.
[4]Committee of Earthquake Engineering.The Hyogoken-Nanbu Earthquake of 1995 investigation into damage to civil engineering structure[A].In:JSCE[C].[s.l.]:[s.n.],1996.256-295.
[5]Iwatate T,Kimura H,Che A L.Scaled model shaking tests and numerical analyses on dynamic response of embedded large-span corrugated steel culverts[A].In:Structural Dynamics,EURPDYN 2002[C].[s.l.]:[s.n.],2002.943-948.
[6]Che A L,Iwatate T,Ge X R.Study on dynamic response of embedded large-span corrugated steel culverts using scaled model shaking table tests and numerical analyses[J].Journal of Zhejiang University(Science A),2006,7(3):430-435.
[7]Kokusyo T,Iwatate T.Scaled model vibration tests and numerical analysis on nonlinear dynamic response of subway structure[A].In:Proceedings of the 24th JSCE Earthquake Engineering Sympo-sium[C].[s.l.]:[s.n.],1996.233-236.
[8]Shawky A,Maekawa K.Computational approach to path-dependant nonlinear RC/soil interaction[A].In:JSCE[C].[s.l.]:[s.n.],1996.197-207.
[9]Wakai A,Ugai K,Li Q,et al.Dynamic elastoplastic analysis of the sliding displacement during earthquake[A].In:Proc.Int.Sym.on Deformation and Progressive Failure in Geomechanics[C].[s.l.]:[s.n.],1997.635-640.
[10]John C M S,Zahrah T F.A seismic design of underground structures[J].Tunneling and Underground Space Technology,1987,21:65-197.
[11]Shukla D K,Rizzo P C,Stephenson D E.Earthquake load analysis of tunnels and shafts[A].In:Proceeding of the 7th World Conference on Earthquake Engineering[C].Michigan,USA:University of Michigan Press,1980.20-28.
1-9.(Pan Changshi.Overview of tunnel seismic disaster[J].Tunnel and Underground Engineering,1990,11(2):1-9.(in Chinese))
[2]林皋,梁青槐.地下结构的抗震设计[J].土木工程学报,1996,29(1):15-24.(Lin Gao,Liang Qinghuai.A seismic design of underground structures[J].China Civil Engineering Journal,1996,29(1):15-24.(in Chinese))
[3]Japanese Geotechnical Society.Damage to Daikai subway station[A].In:Special Issue of Soils and Foundations[C].Japan:[s.n.],1996.283-300.
[4]Committee of Earthquake Engineering.The Hyogoken-Nanbu Earthquake of 1995 investigation into damage to civil engineering structure[A].In:JSCE[C].[s.l.]:[s.n.],1996.256-295.
[5]Iwatate T,Kimura H,Che A L.Scaled model shaking tests and numerical analyses on dynamic response of embedded large-span corrugated steel culverts[A].In:Structural Dynamics,EURPDYN 2002[C].[s.l.]:[s.n.],2002.943-948.
[6]Che A L,Iwatate T,Ge X R.Study on dynamic response of embedded large-span corrugated steel culverts using scaled model shaking table tests and numerical analyses[J].Journal of Zhejiang University(Science A),2006,7(3):430-435.
[7]Kokusyo T,Iwatate T.Scaled model vibration tests and numerical analysis on nonlinear dynamic response of subway structure[A].In:Proceedings of the 24th JSCE Earthquake Engineering Sympo-sium[C].[s.l.]:[s.n.],1996.233-236.
[8]Shawky A,Maekawa K.Computational approach to path-dependant nonlinear RC/soil interaction[A].In:JSCE[C].[s.l.]:[s.n.],1996.197-207.
[9]Wakai A,Ugai K,Li Q,et al.Dynamic elastoplastic analysis of the sliding displacement during earthquake[A].In:Proc.Int.Sym.on Deformation and Progressive Failure in Geomechanics[C].[s.l.]:[s.n.],1997.635-640.
[10]John C M S,Zahrah T F.A seismic design of underground structures[J].Tunneling and Underground Space Technology,1987,21:65-197.
[11]Shukla D K,Rizzo P C,Stephenson D E.Earthquake load analysis of tunnels and shafts[A].In:Proceeding of the 7th World Conference on Earthquake Engineering[C].Michigan,USA:University of Michigan Press,1980.20-28.
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