資源描述：
《碾壓與常態(tài)混凝土組合的某升船機(jī)上閘首結(jié)構(gòu)配筋方案》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、第34卷第3期水利水電科技進(jìn)展2014年5月Vol.34No.3AdvancesinScienceandTechnologyofWaterResourcesMay2014DOI:10.3880/j.issn.10067647.2014.03.014碾壓與常態(tài)混凝土組合的某升船機(jī)上閘首結(jié)構(gòu)配筋方案馬亞岑,汪基偉,冷搖飛(河海大學(xué)土木與交通學(xué)院,江蘇南京搖210098)摘要:針對(duì)既要控制裂縫寬度又要控制裂縫長(zhǎng)度的碾壓與常態(tài)混凝土組成的某升船機(jī)上閘首整體塢式結(jié)構(gòu),通過對(duì)比不同配筋方案的鋼筋混凝土非線性有限元計(jì)算結(jié)果,提出以材料強(qiáng)度標(biāo)準(zhǔn)值所得裂縫長(zhǎng)度和寬度進(jìn)行底板裂縫控制
2、從而確定底板常態(tài)混凝土最小厚度,以材料強(qiáng)度平均值所得裂縫長(zhǎng)度確定鋼筋布置范圍的計(jì)算原則;同時(shí)給出了符合限裂設(shè)計(jì)要求的底板常態(tài)混凝土最小厚度和配筋方案,并探討了縫面水壓的不同施加方式對(duì)裂縫的影響。計(jì)算結(jié)果表明,當(dāng)縫面水壓按全水頭分布施加時(shí),若裂縫長(zhǎng)度超過鋼筋布置范圍,則裂縫會(huì)不斷擴(kuò)展,引起結(jié)構(gòu)失效;縫面水壓按滲透壓力分布和三角形分布施加時(shí),裂縫擴(kuò)展能夠收斂,且前者所得的裂縫寬度和長(zhǎng)度均大于后者。關(guān)鍵詞:鋼筋混凝土;上閘首結(jié)構(gòu);升船機(jī);配筋方案;裂縫寬度;裂縫長(zhǎng)度;有限元分析中圖分類號(hào):U642;TV332搖搖搖文獻(xiàn)標(biāo)志碼:A搖搖搖文章編號(hào):10067647(2014
3、)03006505DeterminationofstructuralreinforcementschemesforupperlockheadofashipliftmadeofRCCandnormalconcrete//MAYacen,WANGJiwei,LENGFei(CollegeofCivilandTransportationEngineering,HohaiUniversity,Nanjing210098,China)Abstract:Itisnecessarytocontrolcrackwidthandcracklengthfortheupperlockh
4、eadofashiplift,whichisgenerallyadock鄄typestructuremadeofrollercompactedconcrete(RCC)andnormalconcrete.Basedonthecomparisonofthenonlinearfiniteelementcalculationresultsofreinforcedconcretewithdifferentstructuralreinforcementschemes,acalculationprinciplewasproposed.Accordingtothisprinci
5、ple,concretestandardstrengthisusedtocontrolcrackwidthandcracklengthinthebottomslabandtodeterminetheminimumthicknessofnormalconcreteofthebottomslab.Thecracklength,determinedbyaveragestrengthofconcrete,isusedtodeterminethescopeofreinforcement.Theminimumthicknessandthestructuralreinforce
6、mentschemeofnormalconcretebottomslabweresuggested.Theinfluenceofapplyingwaysofwaterpressureonthecracksurfaceoncrackswasanalyzed.Theresultsshowedthatwhenthewaterpressureonthecracksurfacewasfullwaterhead,thecracksexpandeduntilitexceededthereinforcementscope,whichcausedstructuralfailure.
7、Whenthewaterpressurewasseepagepressureanditwasappliedinatriangulardistribution,thecrackswassteady;bothcrackwidthandcracklengthobtainedinthescenariowithfullwaterheadarelargerthanthatinthescenariowithseepagepressure.Keywords:reinforcedconcrete;theupperlockheadstructure;shiplift;reinforc
8、ement
