法向承力錨循環(huán)極限抗拔力有限元分析.pdf

1、天津大學(xué)碩士學(xué)位論文法向承力錨循環(huán)極限抗拔力有限元分析姓名：李新超申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：王暉20090501ABSTl認(rèn)CTWiththeexplorationforoilandgasreachingdeeperwaters，theuseoffloatingproductionstorageandoffloading(FPSO)facilitieshasincreased，verticallyloadedanchor

2、(VLA)，anewtypeofmooringfoundationsfordeepwateroffshoreengineering，isusedmoreandmorewidely幽usuallyworksintheseawithdepthof10003000meters，anditisoftensubjectedtocyclicloadingduetowind，wave，oceancurrentandSOonwhichoftenlead

3、totheinstabilityanddestructionofstructures乃estudyonthecyclicultimatepull—outcapacityof幽hasagreatsignificanceTIlispaperusestheconceptofcyclicshearstrengthofsoiltodeterminethecyclicultimatepull—outcapacityofVLAfirstlyAtins

4、ta2DfiniteelementanalysismodelisestablishedbyusingtheABAQUSsoftwareconsideringanchorsoilinteractionSecondthreemodelsofdifferentcyclicshearstrengthcurvesareselectedthecyclicultimatepull—outcapacityof幽issolvedunderdifferen

5、tmodelsandcomparedwiththeultimatepull—outcapacityof幽understaticload。Moreovertheinfluencesoftheembedmentdepthandnumberofcyclesonthecyclicultimatepull—Outcapacityareconsidered。Finallythefailuremechanismof幽undercyclicloadsi

6、sdiscussed111eresultsindicatethatthecyclicultimatepull—outcapacityisreducedconsiderablyduetothesoilpropertytheratioofstaticloadtotheultimatepull—outcapacityofVLAundercyclicloadingnumberofcyclesandtheembedmentdepthetcwi也r