遮帘式板桩码头三维地震动响应
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摘要
为研究遮帘式板桩码头在地震作用下板桩结构与土的相互作用,及前墙弯矩、遮帘桩弯矩和拉杆拉力的变化情况,运用ABAQUS软件研究京唐港32#遮帘式板桩码头在不同加速度峰值的地震载荷作用下的动态响应.结果表明,不同加速度峰值地震波对码头结构有重要影响,地震加速度峰值每增大0.1g,前墙最大弯矩增大约10%,遮帘桩最大弯矩增大约21%,后拉杆拉力增大约25%.地震动土压力对海底标高以上的前墙结构作用不明显,对海底标高以下前墙部分影响较大,对遮帘桩沿桩身分布的动土压力显著;在地震作用下遮帘桩依然发挥前墙挡土的作用.
In order to analyze the pile-soil interaction,front sheet-pile bending moment,covered pile bending moment,and rod tension of covered sheet-piled wharf under earthquake action,the dynamic response of covered sheet-piled wharf of the 32# berth of Jingtang Harbor under seismic load with different peak acceleration is studied by ABAQUS.The result shows that the seismic wave of varied peak acceleration has a significant impact on wharf structure.As peak ground acceleration grows by 0.1g,the front wall maximum bending moment roughly increases by 10%,covered pile maximum bending moment by 21% and back rod tension force by 25%.Dynamic earth pressure has a slight influence on the front wall above seafloor level but a relatively great influence on the wall below seafloor level,and a remarkable influence on dynamic earth pressure distributing along covered pile.Under the influence of seismic action,the covered pile still acts as a screen against soil for the front wall.
In order to analyze the pile-soil interaction,front sheet-pile bending moment,covered pile bending moment,and rod tension of covered sheet-piled wharf under earthquake action,the dynamic response of covered sheet-piled wharf of the 32# berth of Jingtang Harbor under seismic load with different peak acceleration is studied by ABAQUS.The result shows that the seismic wave of varied peak acceleration has a significant impact on wharf structure.As peak ground acceleration grows by 0.1g,the front wall maximum bending moment roughly increases by 10%,covered pile maximum bending moment by 21% and back rod tension force by 25%.Dynamic earth pressure has a slight influence on the front wall above seafloor level but a relatively great influence on the wall below seafloor level,and a remarkable influence on dynamic earth pressure distributing along covered pile.Under the influence of seismic action,the covered pile still acts as a screen against soil for the front wall.
引文
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[3]司海宝,蔡正银,俞缙.遮帘式板桩码头结构与土共同作用3D数值模拟分析[J].土木工程学报,2012,45(5):182-190.
[4]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.
[5]崔冠辰,蔡正银,李小梅,等.遮帘式板桩码头工作机理初探[J].岩土工程学报,2012,34(4):762-766.
[6]张文元.ABAQUS动力学有限元分析指南[M].香港:中国图书出版社,2005.
[7]李丽.基于ABAQUS的高速公路隧道地震动力响应研究[D].成都:西南交通大学,2009.
[8]费康,张建伟.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2010.
[9]陈国兴.土石坝地震工程学[M].北京:科学出版社,2007.
[10]顾淦臣,沈长松,岑威钧.土石坝地震工程学[M].北京:中国水利水电出版社,2009.
[11]中交水运规划设计院,交通部第一航务工程勘探设计院.JTJ225-98水运工程抗震设计规范[S].北京:人民交通出版社,1999.
[12]CHRISTIE S R,P E,G E.Seismic design methods for anchored sheet pile bulkheads[C]//Ports 2010:Building on the Past,Respecting the Fu-ture.Jacksonville,Florida:Am Soc of Civil Engineers,2010:203-212.
[13]李景林,王剑平,蔡正银,等.遮帘桩方案改造板桩码头离心模型试验研究[J].岩土工程学报,2006,28(8):978-982.
[14]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(S):37-40.
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