遮帘式板桩码头抗震特性及设计参数研究
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摘要
板桩码头是港口工程建筑物一种重要的结构形式,但受墙身高度限制,只适用于中小码头建造。遮帘桩的加入,极大地改善了前墙受力,使码头泊位大型深水化成为可能。作为一种新型的结构形式,遮帘式板桩码头抗震特性尚不清楚,地震破坏机理与变形灾变性能是抗震安全设计中需考虑的较复杂的问题。基于非线性有限元分析技术,考虑遮帘桩到前墙间距、遮帘桩长度和遮帘桩厚度等一系列抗震设计参数,研究不同参数时,遮帘式板桩码头前墙残余变形分布特征、墙身以及拉杆受力特性,阐述各设计参数下板桩码头的抗震机理和变形特性,给出各设计参数的合理抗震取值,研究结果为遮帘式板桩码头的抗震安全设计提供参考。
The sheet-pile quay is an important port structure only used in the small quay construction because of the restriction of the wall height. The large-scale deep water berths will be realized due to that covered sheet pile greatly strengthens the force of the front wall. As a new structure,there is no mature theory and method of covered sheet-pile quay, and the seismic characteristics and mechanism is unclear. The seismic residual deformation and seismic mechanism of sheet pile quay are complex problems in the seismic safe design of sheet pile quays. Based on the nonlinear finite element method,a series of seismic design parameters were considered such as spacing between the covered pile and the wall,seismic acceleration amplitude,the length,thickness,intension of the covered pile. The seismic residual deformation and stress characteristics of covered sheet-pile walls and mechanical characteristics of rods are analyzed,seismic mechanisms and deformation characteristics of covered sheet-pile quay are studied in detail and the seismic effect is confirmed under different parameters. Finally,the reasonable seismic design values of design parameters are presented. The achieved results may serve as reference for the seismic safe design of covered sheet-pile quays.
The sheet-pile quay is an important port structure only used in the small quay construction because of the restriction of the wall height. The large-scale deep water berths will be realized due to that covered sheet pile greatly strengthens the force of the front wall. As a new structure,there is no mature theory and method of covered sheet-pile quay, and the seismic characteristics and mechanism is unclear. The seismic residual deformation and seismic mechanism of sheet pile quay are complex problems in the seismic safe design of sheet pile quays. Based on the nonlinear finite element method,a series of seismic design parameters were considered such as spacing between the covered pile and the wall,seismic acceleration amplitude,the length,thickness,intension of the covered pile. The seismic residual deformation and stress characteristics of covered sheet-pile walls and mechanical characteristics of rods are analyzed,seismic mechanisms and deformation characteristics of covered sheet-pile quay are studied in detail and the seismic effect is confirmed under different parameters. Finally,the reasonable seismic design values of design parameters are presented. The achieved results may serve as reference for the seismic safe design of covered sheet-pile quays.
引文
[1]李景林,蔡正银,徐光明,等.遮帘式板桩码头结构离心模型试验研究[J].岩石力学与工程学报,2007,26(6):1 182-1 187.
[2]刘文平,郑颖人,蔡正银,等.遮帘式板桩码头结构有限元分析[J].岩土工程学报,2010,32(4):573-577.
[3]蔡正银,徐光明,曾友金.遮帘式板桩码头土压力离心模型试验研究[J].港工技术,2005,12(S1):51-55.
[4]吕宁,蔡正银,徐光明,等.遮帘式板桩码头结构设计方案的优化与验证[J].港工技术,2005(6):22-24.
[5]李元音,刘永绣.遮帘式板桩码头结构的空间有限元法分析[J].港工技术,2005,12(S1):37-40.
[6]蒋建平,刘春林,蒋宏鸣.遮帘式板桩码头三维地震动响应[J].上海海事大学学报,2013,34(1):28-35.
[7]Takahashi A,Takemura J.Liquefaction-induced large displacement of pile-supported wharf[J].Soil Dynamics and Earthquake Engineering,2005,25:811-825
[8]Bilgin O.Numerical studies of anchored sheet pile wall behavior constructed in cut and fill conditions[J].Computers and Geotechnics,2010,37:399-407.
[9]蒋国栋,张日向,姜萌.板桩码头的ANSYS有限元分析[J].中国水运,2009,9(9):81-83.
[2]刘文平,郑颖人,蔡正银,等.遮帘式板桩码头结构有限元分析[J].岩土工程学报,2010,32(4):573-577.
[3]蔡正银,徐光明,曾友金.遮帘式板桩码头土压力离心模型试验研究[J].港工技术,2005,12(S1):51-55.
[4]吕宁,蔡正银,徐光明,等.遮帘式板桩码头结构设计方案的优化与验证[J].港工技术,2005(6):22-24.
[5]李元音,刘永绣.遮帘式板桩码头结构的空间有限元法分析[J].港工技术,2005,12(S1):37-40.
[6]蒋建平,刘春林,蒋宏鸣.遮帘式板桩码头三维地震动响应[J].上海海事大学学报,2013,34(1):28-35.
[7]Takahashi A,Takemura J.Liquefaction-induced large displacement of pile-supported wharf[J].Soil Dynamics and Earthquake Engineering,2005,25:811-825
[8]Bilgin O.Numerical studies of anchored sheet pile wall behavior constructed in cut and fill conditions[J].Computers and Geotechnics,2010,37:399-407.
[9]蒋国栋,张日向,姜萌.板桩码头的ANSYS有限元分析[J].中国水运,2009,9(9):81-83.
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