不同结构类型棚洞的抗冲击性能研究
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摘要
借助ANSYS/LS-DYNA有限元软件模拟棚洞结构在落石冲击荷载下的动力响应过程,通过分析比较5类棚洞结构的受力与变形的特征,研究不同结构类型的抗冲击性能。研究表明:不同结构类型棚洞在同等冲击作用下会有不同的动力响应,全拱式和半拱式棚洞的抗冲击性能比门式有优势,斜柱式比直柱式抗冲击性能好;门式和半拱式棚洞的柱体顶部内侧与顶板交接处,全拱式棚洞的拱柱底部是最大等效应力的集中部位,实际工程中可采取局部加强措施,保证结构的安全性。
In order to study rock-fall impact properties of different shed-tunnel structures,five kinds of shed-tunnel structures' models were established with the finite element software ANSYS / LS-DYNA. The distribution of force and deformation characteristics was analyzed comparatively. The results showed that different shed-tunnel structure types possess different dynamic responses under the same impact load. The comprehensive analysis of effective stress duration curves and roof displacement indicated that the impact resistances of archstyle and semi-arch-style shed-tunnel structures are better than those of gantry ones,and the impact resistances of inclined column ones are better than those of straight column ones. The maximum equivalent stress distribution showed that dangerous parts of gantry shed-tunnel structures and semi-arch ones are at the juncture between inside of column crown and roof,and those of arch shed-tunnel structures are at the bottom of arch-column,some local reinforcement measures should be adopted in practical projects in order to keep the safety of shed-tunnel structures.
In order to study rock-fall impact properties of different shed-tunnel structures,five kinds of shed-tunnel structures' models were established with the finite element software ANSYS / LS-DYNA. The distribution of force and deformation characteristics was analyzed comparatively. The results showed that different shed-tunnel structure types possess different dynamic responses under the same impact load. The comprehensive analysis of effective stress duration curves and roof displacement indicated that the impact resistances of archstyle and semi-arch-style shed-tunnel structures are better than those of gantry ones,and the impact resistances of inclined column ones are better than those of straight column ones. The maximum equivalent stress distribution showed that dangerous parts of gantry shed-tunnel structures and semi-arch ones are at the juncture between inside of column crown and roof,and those of arch shed-tunnel structures are at the bottom of arch-column,some local reinforcement measures should be adopted in practical projects in order to keep the safety of shed-tunnel structures.
引文
[1]Dai F C,Lee C F,Ngai Y Y.Landslide risk assessment and management:an overview[J].Engineering Geology,2002(64):65-87.
[2]余志祥,许浒,吕蕾,等.落石冲击对山区桥梁墩柱破坏的影响[J].四川大学学报(工程科学版),2012,44(6):86-91.YU Zhi-xiang,XU Hu,LLei,et al.Influence ondamage of bridge pier in mountain area under impact load of rockfall[J].Journal of Sichuan University(Engineering Science Edition),2012,44(6):86-91.
[3]蒋树屏,刘元雪,黄伦海,等.环保型傍山隧道结构研究[J].中国公路学报,2006,19(1):80-83.JIANG Shu-ping,LIU Yua-nxu,HUANG Lun-hai,et al.Research on environmental friendly structure of tunnel adjacent to mountain[J].China Journal of Highway and Transport,2006,19(1):80-83.
[4]Peila D,Pelizza S.Criteria for technical and environmental design of tunnel portals[J].Tunneling and Underground Space Technology,2002,7:335-340.
[5]杨璐,李士民,吴智敏,等.滚石对棚洞结构的冲击动力分析[J].交通运输工程学报,2012,12(1):25-30.YANG Lu,LI Shi-min,WU Zhi-min,et al.Dynamic analysis of rock-fall impact on shed tunnel structure[J].Journal of Traffic and Transportation Engineering,2012,12(1):25-30.
[6]Bhatti A Q,Kishi N.Impact response of RC rock-shed girder with sand cushion under falling load[J].Nuclear Engineering and Design,2010,240:2626-2632.
[7]Ikeda,Kishi K,Kawase N.A practical design procedure of three-layered absorbing system[J].Proceedings of the Joint Japan-Swiss Scientific Semina,1999:113-119.
[8]何思明,吴永.新型耗能减震滚石棚洞作用机制研究[J].岩石力学与工程学报,2010,29(5):926-932.HE Si-ming,WU Yong.Research on cushioning mechanism of new-typed energy dissipative rock shed[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(5):926-932.
[9]蒋树屏.山区公路大跨异型棚洞结构[M].北京:科学出版社,2010.
[10]冉利刚,陈赤坤.高速铁路棚洞设计[J].铁道工程学报,2008(6):61-66.RAN Li-gang,CHEN Chi-kun.The design of the Hangar tunnel of high-speed railway[J].Journal of Railway Engineering Society,2008(6):61-66.
[11]邓应林.棚洞工程在渝湘高速公路中的应用[J].山西建筑,2009,35(32):267-268.DENG Ying-lin.Application of the shed hole project on the Yu-Xiang express way[J].Shanxi Architecture,2009,35(32):267-268.
[12]包飞,胡旭辉.棚洞在渝湘高速公路中的应用[J].公路,2009(10):260-262.BAO Fei,HU Xu-hui.Application of the shed hole on the Yu-Xiang express way[J].Highway,2009(10):260-262.
[13]黄伦海,蒋树屏,胡学兵.公路棚洞结构形式初探[J].公路交通技术,2009(6):110-115.HUANG Lun-hai,JIANG Shu-ping,HU Xue-bing.Prelmiinary probe into structural forms of shed tunnels on highways[J].Technology of Highway and Transport,2009(6):110-115.
[14]蒋树屏,刘元雪,黄伦海,等.隧道出口段环保型结构稳定性分析[J].岩土工程学报,2005,27(5):577-581.JIANG Shu-ping,LIU Yuan-xu,HUANG Lun-hai,et al.Stability analysis of environmental protection structure on exit of tunnel[J].Chinese Journal of Geotechnic al Engineering,2005,27(5):577-581.
[15]伍臣宇,高峰.地震区棚洞合理结构形式的研究[J].重庆交通大学学报(自然科学版),2013,32(1):27-31.WU Chen-yu,GAO Feng.Study on rational structureof shedtunnel under seismic loading[J].Journal of Chongqing Jiaotong University(Natural Science),2013,32(1):27-31.
[16]JTG D70-2004公路隧道设计规范[S].北京:人民交通出版社,2004.
[2]余志祥,许浒,吕蕾,等.落石冲击对山区桥梁墩柱破坏的影响[J].四川大学学报(工程科学版),2012,44(6):86-91.YU Zhi-xiang,XU Hu,LLei,et al.Influence ondamage of bridge pier in mountain area under impact load of rockfall[J].Journal of Sichuan University(Engineering Science Edition),2012,44(6):86-91.
[3]蒋树屏,刘元雪,黄伦海,等.环保型傍山隧道结构研究[J].中国公路学报,2006,19(1):80-83.JIANG Shu-ping,LIU Yua-nxu,HUANG Lun-hai,et al.Research on environmental friendly structure of tunnel adjacent to mountain[J].China Journal of Highway and Transport,2006,19(1):80-83.
[4]Peila D,Pelizza S.Criteria for technical and environmental design of tunnel portals[J].Tunneling and Underground Space Technology,2002,7:335-340.
[5]杨璐,李士民,吴智敏,等.滚石对棚洞结构的冲击动力分析[J].交通运输工程学报,2012,12(1):25-30.YANG Lu,LI Shi-min,WU Zhi-min,et al.Dynamic analysis of rock-fall impact on shed tunnel structure[J].Journal of Traffic and Transportation Engineering,2012,12(1):25-30.
[6]Bhatti A Q,Kishi N.Impact response of RC rock-shed girder with sand cushion under falling load[J].Nuclear Engineering and Design,2010,240:2626-2632.
[7]Ikeda,Kishi K,Kawase N.A practical design procedure of three-layered absorbing system[J].Proceedings of the Joint Japan-Swiss Scientific Semina,1999:113-119.
[8]何思明,吴永.新型耗能减震滚石棚洞作用机制研究[J].岩石力学与工程学报,2010,29(5):926-932.HE Si-ming,WU Yong.Research on cushioning mechanism of new-typed energy dissipative rock shed[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(5):926-932.
[9]蒋树屏.山区公路大跨异型棚洞结构[M].北京:科学出版社,2010.
[10]冉利刚,陈赤坤.高速铁路棚洞设计[J].铁道工程学报,2008(6):61-66.RAN Li-gang,CHEN Chi-kun.The design of the Hangar tunnel of high-speed railway[J].Journal of Railway Engineering Society,2008(6):61-66.
[11]邓应林.棚洞工程在渝湘高速公路中的应用[J].山西建筑,2009,35(32):267-268.DENG Ying-lin.Application of the shed hole project on the Yu-Xiang express way[J].Shanxi Architecture,2009,35(32):267-268.
[12]包飞,胡旭辉.棚洞在渝湘高速公路中的应用[J].公路,2009(10):260-262.BAO Fei,HU Xu-hui.Application of the shed hole on the Yu-Xiang express way[J].Highway,2009(10):260-262.
[13]黄伦海,蒋树屏,胡学兵.公路棚洞结构形式初探[J].公路交通技术,2009(6):110-115.HUANG Lun-hai,JIANG Shu-ping,HU Xue-bing.Prelmiinary probe into structural forms of shed tunnels on highways[J].Technology of Highway and Transport,2009(6):110-115.
[14]蒋树屏,刘元雪,黄伦海,等.隧道出口段环保型结构稳定性分析[J].岩土工程学报,2005,27(5):577-581.JIANG Shu-ping,LIU Yuan-xu,HUANG Lun-hai,et al.Stability analysis of environmental protection structure on exit of tunnel[J].Chinese Journal of Geotechnic al Engineering,2005,27(5):577-581.
[15]伍臣宇,高峰.地震区棚洞合理结构形式的研究[J].重庆交通大学学报(自然科学版),2013,32(1):27-31.WU Chen-yu,GAO Feng.Study on rational structureof shedtunnel under seismic loading[J].Journal of Chongqing Jiaotong University(Natural Science),2013,32(1):27-31.
[16]JTG D70-2004公路隧道设计规范[S].北京:人民交通出版社,2004.
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