地震工程学报
地震工程學報
지진공정학보
China Earthquake Engineering Journal
2015年
2期
410-414
,共5页
韩小凯%曹雪健%唐小微%张西文%付培帅
韓小凱%曹雪健%唐小微%張西文%付培帥
한소개%조설건%당소미%장서문%부배수
遮帘式板桩码头%地震液化%前墙剪力
遮簾式闆樁碼頭%地震液化%前牆剪力
차렴식판장마두%지진액화%전장전력
covered sheet-pile wharf%seismic liquefaction%front wall shear
遮帘式板桩码头作为一种新型的板桩结构型式,其抗震性能研究是设计建造过程中的重要环节。在 FEM-FDM 水土耦合计算的平台上引入循环弹塑性本构模型,借助 FORTRAN 编程软件形成饱和砂土动力液化分析的数值方法,可有效模拟饱和砂土在地震动力作用下的非线性及大变形特性,同时也可模拟砂土液化流动对遮帘桩和前墙的动土压力。研究表明:地震作用下可液化土层超孔隙水压力比增长并发生较大的水平流动变形,对前墙的水平破坏大于竖向破坏;前墙剪力最大值位于海床与前墙交界处;遮帘桩剪力最大值位移与前墙底平行的位置;后拉杆拉力逐渐变大,前拉杆拉力逐渐变小。通过对板桩码头地震液化灾害的分析,可为抗震和抗液化设计提供参考依据。
遮簾式闆樁碼頭作為一種新型的闆樁結構型式,其抗震性能研究是設計建造過程中的重要環節。在 FEM-FDM 水土耦閤計算的平檯上引入循環彈塑性本構模型,藉助 FORTRAN 編程軟件形成飽和砂土動力液化分析的數值方法,可有效模擬飽和砂土在地震動力作用下的非線性及大變形特性,同時也可模擬砂土液化流動對遮簾樁和前牆的動土壓力。研究錶明:地震作用下可液化土層超孔隙水壓力比增長併髮生較大的水平流動變形,對前牆的水平破壞大于豎嚮破壞;前牆剪力最大值位于海床與前牆交界處;遮簾樁剪力最大值位移與前牆底平行的位置;後拉桿拉力逐漸變大,前拉桿拉力逐漸變小。通過對闆樁碼頭地震液化災害的分析,可為抗震和抗液化設計提供參攷依據。
차렴식판장마두작위일충신형적판장결구형식,기항진성능연구시설계건조과정중적중요배절。재 FEM-FDM 수토우합계산적평태상인입순배탄소성본구모형,차조 FORTRAN 편정연건형성포화사토동력액화분석적수치방법,가유효모의포화사토재지진동력작용하적비선성급대변형특성,동시야가모의사토액화류동대차렴장화전장적동토압력。연구표명:지진작용하가액화토층초공극수압력비증장병발생교대적수평류동변형,대전장적수평파배대우수향파배;전장전력최대치위우해상여전장교계처;차렴장전력최대치위이여전장저평행적위치;후랍간랍력축점변대,전랍간랍력축점변소。통과대판장마두지진액화재해적분석,가위항진화항액화설계제공삼고의거。
The all-covered type of sheet-pile wharf is a new type of sheet-pile structure,and research into its seismic performance is important for its design and construction.In this study, based on the FEM-FDM soil coupling calculation platform,the cyclic elastic-plastic constitutive model is introduced.The FORTRAN dynamic programming software is used for saturated sandy soil liquefaction numerical analysis.This software can effectively simulate saturated sand under earthquake dynamic nonlinear and large deformation and can also simulate sand liquefaction flow at the barrier of the pile and the front wall.The results are:under the action of earthquakes,the excess pore water pressures of liquefiable soils increase and there is large deformation due to hori-zontal flow;the horizontal damage to the front wall is greater than the vertical damage.The maxi-mum shear wall is located in the seabed and before the wall at the junction.The barrier pile is the location of the maximum shear displacement parallel to the bottom of the front wall.The rod ten-sion in the back increases gradually,while that in front reduces gradually.Through the analysis of sheet-pile wharf disasters caused by seismic liquefaction,the results of this study provide a refer-ence for seismic and liquefaction resistance design.