Page 173 - 《水资源与水工程学报》2022年第3期
P. 173

!33 " ! 3 #                       & ' ( ) & * + , -                               Vol.33No.3
               2022 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2022

            DOI:10.11705/j.issn.1672-643X.2022.03.22


                               ;š´:{ß¿)ù–*8‘’

                                        Àq›š´2+Þ¦¿


                                           1        1         1         2         1
                                      … s , ) s , !ÆÇ , )È] , ÉÊ2
                   (1. #¾k6 WZW¶6n, => $r 210098;2. WZ^$rWZWc4Y×(^¨, => $r 210012)
                 D E: st^ýɛRéžÚ®kžÚÿÜCòÀB9¡Öå^×~moç[w¡, ®‚kkžÚÿÜCÅ
                 §û`de7À«, ;~B+ýÉōX@òÀB9d€, šAkžÚÿÜC¡Öå^פßb×
                 ~m“‘–—; ;~®IōXoÀúåÖ\è›RéžÚ‘, ½t^AýɛRéžÚ®¡Öå^×
                 oç[w¡。(^œ: ¡Öå^×ST)P®k›ÜéžÚ*ÒO¬ðó~•¤É, –kü›RéžÚ®
                 þkm"«ÆÇÔ¡Öå^פßST‘–—, kü“oü›RéžÚÁžUBD¬B®¡Öå^פßd
                 5~mo)ìàç[, Šþü›RéžÚ®¡Öå^×oç[w¡‡X。(^5›žs®kžÚÿÜCÅ
                 òÀ)9šo;~¶×ōX¡}ñd€)"“#þ±7ádÍÎn‹。
                 FGH: kžÚÿÜC; ¡Öå^×; ÿÜCòÀ; ōX; éžÚ; ç[w¡; §û`
                 8IBJK:TV431   LMNOP:A    LQRK:1672643X(2022)03016907
                          Effectsofcoarseaggregateofdifferentsizegradesonthe
                                       strainlocalizationofmassconcrete


                                       1
                                                                1
                                                                            2
                                                1
                             JIANGLei,XULei,ZHANGJingni,XULanyu,RENQingwen                  1
               (1.CollegeofWaterConservancyandHydropowerEngineering,HohaiUniversity,Nanjing210098,China;2.NanjingResearch
                    InstituteofHydrologyandWaterConservationAutomation,MinistryofWaterResources,Nanjing210012,China)
                 Abstract:Inordertorevealtheeffectsofcoarseaggregateofdifferentsizegradesonthestrainlocaliza
                 tionofmassconcrete,weestablishedamesoscopicfiniteelementmodeltosimulatethedamageandfrac
                 tureoffullygradedaggregatemassconcreteundertheconditionsofdifferentmesoscopicmaterialstruc
                 tures ,soastoanalyzetheevolutionprocessanddistributioncharacteristicsoftheregionofstrainlocaliza
                 tion.Inthesimulation ,theeffectsofcoarseaggregateofdifferentsizegradesonthestrainlocalization
                 wererespectivelybroughttolightbychangingthecoarseaggregatedistributionofoneindividualsize
                 gradewhilekeepingthatoftheothersizegradesunchanged.Numericalresultsshowthatmostofthe
                 strainlocalizationappearintheinterfacialtransitionzonebetweenthelargecoarseaggregatesandthe
                 mortar ,andthemaindistributioncharacteristicsofthestrainlocalizationregionismainlycontrolledby
                 theextralargecoarseaggregate.Moreover ,thelargeandmediumaggregatesplayimportantrolesinthe
                 evolutionprocessofthestrainlocalizationregiondirectlyorindirectly ,whereasthesmallcoarseaggregate
                 haslittleeffect.Theresearchfindingscanprovideapreliminarybasisforreducingthesimulationdifficul
                 tiesandcomputationaldemandbysimplifyingthemesostructureofmassconcrete.
                 Keywords:massconcrete;strainlocalization;concretedamage;mesostructure;coarseaggregate;
                 effect;finiteelement




                !"#$:20210808; %&#$:20220111
                '()*: =>45/678.3(51979092、51739006、U1765204); =>%WZ/0.3(2020024)
                +,-.: Ÿ ¡(1998-), a, K$“·K, ÓM(^P, STUVWlÿÜC²ÚÏÐd€(^。
                /0+,: Ð ¡(1981-),a,=>¿JK,LM,ÒNO,ÓMPQR,STUVWlÿÜC²Ú*X/("š
                        ]e*‰¾(^。
   168   169   170   171   172   173   174   175   176   177   178