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深厚软基上大圆筒结构循环承载力有限元分析

Keywords: 大圆筒结构,循环强度,失稳模式,软土地基,有限元

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Abstract:

为了评价深厚软土地基上大圆筒结构在波浪荷载作用下的稳定性,考虑波浪可能导致的软黏土地基发生强度和刚度弱化的循环软化效应,将Andersen等建议的软黏土循环强度概念与不排水条件下Duncan-Chang非线性应力应变关系相结合,建议了非线性弹塑性-循环强度模型,并在ABAQUS软件中予以数值实施.并对深厚软基上深埋式大圆筒结构的承载力特性以及失稳模式进行了三维有限元数值分析,并与单调加载条件下的计算结果进行了比较.结果表明:大圆筒结构物地基在循环破坏时的失稳形态及地基中等效塑性应变的分布与极限破坏状态时存在较大差异;大圆筒结构的循环承载力相对于极限承载力有较大降低,并且受到荷载作用点高度及荷载循环破坏次数等诸多因素的影响.

References

[1]  WANG J H,Li C,MORAN K.Cyclic undrained behavior of soft clays and cyclic bearing capacity of a single bucketfoundation[C]∥Proceedings of 15th International Offshore and Polar Engineering Conference,Seoul:Korea,2005,2:377-383.
[2]  ANDERSEN K H,MURFF J D,RANDOLPH M F,et al.Suction anchors for deepwater applications[C]∥Proceedings ofthe First International Symposium on Frontiers in Offshore Geotechnics,Perth:Australia,2005:3-30.
[3]  BONIN J P,DELEUIL G,ZALESKI-ZAMENHOF L C.Foundation analysis of marine gravity structures submitted tocyclic loading[C]∥Offshore Technology Conference,Houston:Texas,1976:571-579.
[4]  范庆来.软土地基上深埋式大圆筒结构稳定性研究[D].大连:大连理工大学土木水利学院,2007.FAN Qing-lai.A study on stability of deeply-embedded large-diameter cylindrical structure in soft ground[D].Dalian:School of Civil and Hydraulic Engineering of Dalian University of Technology,2007.(in Chinese)
[5]  范庆来,栾茂田,杨庆,等.考虑循环软化效应的软基上深埋大圆筒结构承载力分析[J].大连理工大学学报,2006(5):702-706.FAN Qing-lai,LUAN Mao-tian,YANG Qing,et al.Analyses of bearing capacity for deeply-buried large-diametercylindrical structure on soft clay considering cyclic-softening effect[J].Journal of Dalian University of Technology,2006(5):702-706.(in Chinese)
[6]  LUAN M T,FAN Q L.Numerical analyses of bearing capacity of deep-embedded large-diameter cylindrical structure onsoft ground against lateral loads[J].China Ocean Engineering,2006,20(4):623-634.
[7]  张其一,栾茂田,张小玲.复合加载下非均质地基上矩形基础的极限承载力[J].北京工业大学学报,2009,35(3):111-117.ZHANG Qi-yi,LUAN Mao-tian,ZHANG Xiao-ling.Ultimate bearing capacity of rectangular footings on inhomogeneoussoil under combined loading[J].Journal of Beijing University of Technology,2009,35(3):111-117.(in Chinese)
[8]  MURFF J D,HAMILTON J M.P-ultimate for undrained anlaysis of laterally loaded piles[J].Journal of the GeotechnicalEngineering Division,1993,119(1):91-107.
[9]  AUBENY C,HAN S,MURFF J D.Suction caission capacity in anisotropic,purely cohesive soil[J].International Journalof Geomechanics,2003,3(2):225-235.
[10]  竺存宏,邓冰,田双珠.沉入式大圆筒在深水码头结构中的应用研究有关问题探讨[J].水道港口,1997(4):1-7.ZHU Cun-hong,DENG Bing,TIAN Shuang-zhu.Approach to questions concerning the test-research of deeply-embeddedlarge-diameter cylindrical shells as deep-water-wharf structure[J].Journal of Waterway and Harbor,1997(4):1-7.(inChinese)
[11]  MATASOVIC N,VUCETIC M.A pore pressure model for cyclic straining of clay[J].Soils and Foundations,1992,32(3):156-173.
[12]  ANDERSEN K H,KLEVEN A,HEIEN D.Bearing capacity for foundation with cyclic loads[J].Journal of theGeotechnical Engineering Division,1988,114(5):540-555.
[13]  ANDERSEN K H,DYVIK R,SCHRODER K,et al.Field tests of anchors in clayⅡ:predictions and interpretation[J].Journal of Geotechnical Engineering,ASCE,1993,119(10):1532-1549.
[14]  范期锦,李乃扬.长江口二期工程北导堤局部破坏的原因及对策[J].中国港湾建设,2004(2):1-8.FAN Qi-jin,LI Nai-yang.The reasons and countermeasures for north bank’s part failure in the second phase regulationproject of Yangtze estuary[J].China Harbour Engineering,2004(2):1-8.(in Chinese)
[15]  刘海笑,王仲捷,唐云,等.随机波作用下沉入式大圆筒结构的动土压力及结构失稳机理研究[J].中国港湾建设,2002(6):21-25.LIU Hai-xiao,WANG Zhong-jie,TANG Yun,et al.Dynamic earth pressures on deeply embedded large cylindrical structureunder random waves and mechanism investigation on structural instability[J].China Harbour Engineering,2002(6):21-25.(in Chinese)
[16]  范庆来,栾茂田,杨庆.横观各向同性软基上深埋式大圆筒结构水平承载力分析[J].岩石力学与工程学报,2007,26(1):94-101.FAN Qing-lai,LUAN Mao-tian,YANG Qing.Numerical analysis of ultimate bearing capacity of large-diameter cylindricalstructures deeply embedded in cross-isotropic soft soil against lateral loads[J].Chinese Journal of Rock Mechanics andEngineering,2007,26(1):94-101.(in Chinese)

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