叉桩布置对高桩码头地震动力反应的影响
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摘要
为了解叉桩对码头抗震性能的影响作用,建立高桩码头结构动力有限元模型,以全直桩高桩码头、美国Okland港第七街高桩码头和霍华德高桩码头为算例,研究全直桩码头、叉桩承台码头、叉桩置于全直桩码头后方这三种码头结构型式的地震反应,在此基础上提出设计建议。分析结果表明,全直桩码头结构柔度大,延性好,内力分配相对均匀,可通过大变形吸收地震能量,抗震性能较好;叉桩置于码头承台时,码头结构刚度相对较大,使叉桩节点易于发生破坏;叉桩置于全直桩码头后方时,叉桩可阻挡部分地震波的传播,降低码头结构刚度,减小码头桩周土弱化程度,全直桩码头结构的抗震性能显著提高。
Recent researches have highlighted that batter piles might cause damage to pile-supported wharf during a violent earthquake,however,according to the performance of the batter piles in the 7th street Marine Terminal and the Howard Marine Terminal of Oakland outer harbor in 1989 Loma Prieta earthquake,it may not be true.In order to better understand the seismic performance of plumb pile system,batter pile system and plumb pile system with independent batter piles in the rear,the dynamic time history analysis was implemented for those three marine terminals.The analysis results indicate that,the plumb pile system could decrease earthquake energy through large deformations to reduce the damage risk;the batter pile system might be damaged by the batter piles;while the independent batter piles were in the rear of plumb pile system,the batter piles would disturb the propagation of seismic waves,which could reduce seismic effects,so the seismic performance of plumb pile system could be better here.
Recent researches have highlighted that batter piles might cause damage to pile-supported wharf during a violent earthquake,however,according to the performance of the batter piles in the 7th street Marine Terminal and the Howard Marine Terminal of Oakland outer harbor in 1989 Loma Prieta earthquake,it may not be true.In order to better understand the seismic performance of plumb pile system,batter pile system and plumb pile system with independent batter piles in the rear,the dynamic time history analysis was implemented for those three marine terminals.The analysis results indicate that,the plumb pile system could decrease earthquake energy through large deformations to reduce the damage risk;the batter pile system might be damaged by the batter piles;while the independent batter piles were in the rear of plumb pile system,the batter piles would disturb the propagation of seismic waves,which could reduce seismic effects,so the seismic performance of plumb pile system could be better here.
引文
[1]JTJ225-98水运工程抗震设计规范[S].JTJ225-98 The aseismatic design criterion of waterway engineering[S].(in Chinese)
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[4]谢世楞.奥克兰港高桩码头的震害对比[J].港工技术,1990,(4):13-17.XIE Shileng,Damage contrast between the pile-wharves at Oakland harbor[J].Port Engineering Technology,1990,(4):13-17.(in Chinese)
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[6]Charles W Roeder,Robert Graff,Jennifer L oderstrion,et al.Seismic performance of pile-wharf connections[D].University of Washington,2001.
[7]Yan Liping,Arulmoli Kandiah,Weismair Max,Seismic soil-structure interaction analyses of an underwater bulkhead and wharf system[J].Geotech-nical Engineering for Transportation Projects,2004(2):547-555.
[8]Mageau D W,Chin K H.Finite element modeling of new marine terminal at the port of tacoma[C].Ports 2007:30 Years of Sharing Ideas 1977-2007;Proceedings of the Eleventh Triennial International Conference.2007:116-126.
[9]Varun S M,Dominic Assimaki.Integrating soil-structure interaction analyses of pile-supported wharfs in seismic risk management of port systems[C].Proceedings of the Geotechnical Earthquake Engineering and Soil Dynamics IV Congress 2008-Geotechnical Earthquake Engineering and SoilDynamics,2008:1-10.
[10]李颖,贡金鑫.有斜桩和无斜桩高桩码头地震反应的非线性有限元分析[J].水利水运工程学报,2011(2):1-13.LI Ying,GONG Jinxing.Nonlinear finite element analysis of the seismic response of batter pile system and plumb pile system of pile-wharves[J].Journal of Hydraulic and Waterway Engineering,2011(2):1-13.(in Chinese)
[11]李学罡,蔡明兮.材料力学[M].长春:吉林科学技术出版社,2005.LI Xuegang,CAI Mingxi.Mechanics of Materials[M].Changchun:The Publisher of Jilin Science Technology,2005.(in Chinese)
[2]李颖,贡金鑫.预应力高桩码头振型反应谱抗震分析[J].大连理工大学学报,2011(6):846-853.LI Ying,GONG Jinxing.The modal response spectrum seismic analysis of prestressed pile-wharf[J].Journal of Dalian University of Technology,2011(6):846-853.(in Chinese)
[3]李文贵,龙炳煌.高桩码头叉桩节点抗震性能有限元数值模拟[J].建筑科学与工程学报,2010(4):86-95.LI Wengui,LONG Binghuang,The finite element numerical simulation of batter piles in pile-wharf[J].Journal of Building Science and Engineer-ing,2010(4):86-95.(in Chinese)
[4]谢世楞.奥克兰港高桩码头的震害对比[J].港工技术,1990,(4):13-17.XIE Shileng,Damage contrast between the pile-wharves at Oakland harbor[J].Port Engineering Technology,1990,(4):13-17.(in Chinese)
[5]McCullough Nason J,Dickenson Stephen E,Schlechter Scott M.The seismic performance of piles in waterfront applications[C].Ports 2001:Ameri-ca's Ports-Gateways to the Global Economy-Proceedings of the Ports 2001 Conference.2004,108:1-10.
[6]Charles W Roeder,Robert Graff,Jennifer L oderstrion,et al.Seismic performance of pile-wharf connections[D].University of Washington,2001.
[7]Yan Liping,Arulmoli Kandiah,Weismair Max,Seismic soil-structure interaction analyses of an underwater bulkhead and wharf system[J].Geotech-nical Engineering for Transportation Projects,2004(2):547-555.
[8]Mageau D W,Chin K H.Finite element modeling of new marine terminal at the port of tacoma[C].Ports 2007:30 Years of Sharing Ideas 1977-2007;Proceedings of the Eleventh Triennial International Conference.2007:116-126.
[9]Varun S M,Dominic Assimaki.Integrating soil-structure interaction analyses of pile-supported wharfs in seismic risk management of port systems[C].Proceedings of the Geotechnical Earthquake Engineering and Soil Dynamics IV Congress 2008-Geotechnical Earthquake Engineering and SoilDynamics,2008:1-10.
[10]李颖,贡金鑫.有斜桩和无斜桩高桩码头地震反应的非线性有限元分析[J].水利水运工程学报,2011(2):1-13.LI Ying,GONG Jinxing.Nonlinear finite element analysis of the seismic response of batter pile system and plumb pile system of pile-wharves[J].Journal of Hydraulic and Waterway Engineering,2011(2):1-13.(in Chinese)
[11]李学罡,蔡明兮.材料力学[M].长春:吉林科学技术出版社,2005.LI Xuegang,CAI Mingxi.Mechanics of Materials[M].Changchun:The Publisher of Jilin Science Technology,2005.(in Chinese)
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