Page 167 - 《水资源与水工程学报》2023年第2期
P. 167

!34 " ! 2 #                       & ' ( ) & * + , -                               Vol.34No.2
               2023 $ 4 %               JournalofWaterResources&WaterEngineering                 Apr.,2023

            DOI:10.11705/j.issn.1672-643X.2023.02.21


                   'ÖEå\sh9ßDEYâäþ4S]$


                                            1         1        2         1         1
                                     ãäå , æç… , è é , 7ˆê , ëìl
                    (1. —F\& 01_¨©&`, ãk ññ 443002;2. —F*^KØä7əé¸ä, ˆH Øä 529599)
                 C D: a™y]]‡ÓÕ&ÇUõ³¿.Z~'›wu)FÎĕ–, nló„f\ˆy]]×ßX'Êà
                 ˆ ²eÎ, ëf·˜wuJ、 FÎÄ`nõˆÕ&ÇUá^ÃÄZâˆgw¸^。mòH…ÀÙڃó´
                 *ˆ02y]]ê)ÔN³Ä ²ú×x, $Õ'›ƒlӃlûXˆwuJ、 FÎÄ, ÷f“ {¦ó8 -ÍE
                 I ‡Ó™ér­®” (ǘˆE7, õ«À>â_|ňQ¸Õ&ÇU; •n’y]]wu³Ä„G|Å
                 ³ÄˆR>è, õ«ƒlûX|ųĐY³Ä ²ú; ÔÕ$ú³¿Àõ«ˆ|ųĐÓy]]
                 ³Ä。ÇÈÉÊ: >â、 |ňÕ&ÇU_y]]Õ&ÇUX'µ¶, '›wuÎÄõ«ˆ>â、 |ÅQ¸
                  ²ú' 0.13~0.20 ¢£, |ųĠ²úG 0.125; (ڃó´*\, |ň³Ä¹¸_y]]ˆ³Ä¹¸(‘
                 Ö|ň³Ä‰\›y]]ˆ³Ä, õ«ˆ|ųĐõGy]]³Äˆ 2.5 S。
                 >EF: 02y]]; ‡ÓÕ&ÇU; ÇUõ; ³Ä;  ²ú; Q¸­Ÿ
                 GHIJK:TV315   LMNOP:A    LQRK:1672643X(2023)02016308

                       Inversionanalysisofmesomechanicalparametersofhydraulic
                                   concretebasedonmeasuredcreepchange

                                                                 2
                                   1
                                                                             1
                                                                                               1
                                                     1
                         HEYiyang,HUANGYaoying,XIETong,LIZepeng,DINGShengyong
                    (1.CollegeofHydraulic&EnvironmentalEngineering,ChinaThreeGorgesUniversity,Yichang443002,China;
                          2.ThreeGorgesNewEnergyYangjiangPowerGenerationCo.,Ltd.,Yangjiang529599,China)
                 Abstract:Theexistinginversionanalysisofthemesoscopicmechanicalparametersofconcreteisgeneral
                 lybasedonthemeasuredaxialstrain ;however,concretespecimensusuallyshowobviousPoissoneffect
                 underloads.So ,themechanicalparametersoptimizedbythecombinationofmeasuredlongitudinaland
                 transversestraininversioncanbetterreflecttherealperformanceofthematerial.Here ,theuniaxialcom
                 pressioncreepPoisson ’sratiotestofhydraulicconcretewithdifferentloadingageswasconducted,and
                 thentheelasticparametersofaggregateandmortarwereinvertedusingthecombinedmethodof “orthogo
                 naldesign-neuralnetwork-mesoscopicfiniteelementmodel ”,basedonthemeasuredlongitudinaland
                 transversestrainsoftheloadingandloadholdingstages.Then,themeasuredcreepvariabilityofconcrete
                 wastakenastheinitialvalueofthemortar ,andthecreepvariabilityandthecreepPoisson’sratioofthe
                 mortarattheloadholdingstagewereobtainedbyinversion.Finally,thecreepvariabilityofmortarand
                 thecreepvariabilityofconcreteobtainedbyinversionwerecomparedandanalyzed.Theresultsshowthat
                 thereisadifferencebetweenthemechanicalparametersofaggregate&mortarandconcrete,theelastic
                 Poisson’sratioofaggregateandmortarobtainedfrom measuredstraininversionisbetween0.13and
                0.20 ,andthecreepPoisson’sratioofmortarisabout0.125;underthesameloadingage,thecreep
                 characteristicsofmortararesimilartothatofconcreteandthecreepvariabilityofmortarislargerthan
                 thatofconcrete,whichisabout2.5timesgreateraccordingtothisresearch.
                 Keywords:hydraulicconcrete;mesomechanicalparameter;parameterinversion;creepvariability;

                !"#$:20220520; %&#$:20221031
                '()*: uv#$%&'()*(52179135、51779130)
                +,-.: 5.Ø(1997—), ë, ^ä5L@, RB6CD, 6CEFG023êZ•V。
                /0+,: œÔ(1977—), ë, ãLÄö@, AB, PQ, ABDST, -‰Œ1023®e_°wx、 Uè8½YUV,
                        E†ˆ6C2„。
   162   163   164   165   166   167   168   169   170   171   172