Page 164 - 《水资源与水工程学报》2022年第5期
P. 164

! 33 " ! 5 #                      & ' ( ) & * + , -                               Vol.33No.5
               2022 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2022

            DOI:10.11705/j.issn.1672-643X.2022.05.20


                           ›mÁno=Ýp=qrsŒ¨TU


                                                      1
                                                                1
                                               %)- , µ8” , F ¸           2
                            (1. 1&GUP& ½d£¹1ie-;©CI!"Jefgh, o1 1& 710048;
                                      2. v-ۋ‰Ÿ"@YšÑÜ&.Ò, o1 1& 710043)

                 C D: P[qï§CF?F¨ºC×ÝG··y?ÌÉ¿&'é;J«¦§。¹‰—Aqï§CF?Ü&>º
                 Ä, yäSTC - F - ?É¿ d_{³, Â×F - ?£ü»Š。)P{e[¡`rC×'v@X, @@—§C
                 UƒTPXv‚¤Øҍ±xÚé; C×%_, ST—Cג{O£„F?ª«¿Ë d_§G, yä>?
                 —C׻ނ¤jÞ@/D‚¤ØxÚyF?¿Ë§G ¦§ÿŠ。ÉßÎà: F¨%FDgChF‚ƒ„ 
                 #üÛÍW?ÌÉ¿ åÜÛÍ\˜½]P, ¢•€Üû;£ü á; Z’rjÞ@/¢®F?H¿Ëd_§
                 Gãy’rjÞg›iP, °‘…G_ iPPŸ±P 50%, T‚,Y—¿Ë êw7âã; ÷øØҍ±xÚ 
                 ij, Cג{O£‘k, F?ª«¿Ë d_§G·¸, §ÙÌ$Ëv KÄòßÚ、 dÌ、 |Ú §G„·P½ã
                 y]P, ?É §G„·P½]±。
                 EFG: §CF?; åÜÛÍ; £ü; C×ÝG; d_§G
                 HIJKL:TU991.39   MNOPQ:A    MRSL:1672643X(2022)05016009
                            Responseoflongspanwaterconveyancecablestayed

                                    pipelinebridgetowaterhammerimpact

                                                                      1
                                                     1
                                       ZHANGJiarui,SONGZhiqiang,LIUChen          2
                  (1.StateKeyLaboratoryofEcohydraulicsinNorthwestAridRegionofChina,Xi’anUniversityofTechnology,Xi’an
                     710048,China;2.ChinaRailwayFirstSurveyandDesignInstituteGroupCo.,Ltd.,Xi’an710043,China)
                 Abstract:Thewaterhammereffectinthepipelineoflongspancablestayedpipelinebridgesoftenhasan
                 greatadverseinfluenceonthebridgestructuresafety.Thefiniteelementmodelofacablestayedpipeline
                 bridgewasestablishedtocomparativelyanalyzethedynamiccharacteristicsofwater-pipe-bridgestruc
                 ture ,andthepipe-bridgeresonancecheckwascarriedout.Thebasicequationofwaterhammeris
                 solvedbythecharacteristiclinemethod,thenthewaterhammerpressuregeneratedbydifferentvalve
                 closingtimeintheprocessofwaterconveyanceconditionconversionwascalculatedtoanalyzethedynam
                 icresponseofthemaincomponentsofthepipelinebridgeundertheimpactofwaterhammerandthe
                 effectsofdifferentloadingmodesofwaterhammerloadanddifferentvalveclosingtimeontheresponseof
                 thecomponentsofthepipelinebridge.Theresultsshowthatthenaturalvibrationfrequenciesofcable
                 stayedbridgeandwaterconveyancepipelinearequitedifferentfromeachotherwhetherthereisnowater
                 orfullofwaterinthepipeline ,sothepipe-bridgeresonancewillnotoccur.Thenonuniformloading
                 modesignificantlyincreasesthedynamicresponseofeachcomponentofthepipelinebridge ,andboththe
                 incrementofdisplacementandstressaremorethan50%,buttheywillnotcausetheinstabilityorfailure
                 ofthecomponents.Withtheincreaseofvalveclosingtime,theimpactofwaterhammerisweakened,
                 andthedynamicresponseofthemaincomponentsdecreases,ofwhichtheresponseoftheKtypesupport
                 rod ,beamandventralrodinthesteeltrussbeam assemblydecreasessignificantly,whilethatofthe
                 bridgetoweronlydecreasesslightly.

                !"#$:20211124; %&#$:20220429
                '()*: !"#$%&'()*(51479165)
                +,-.: ÃÒ/(1999-), /, s1fìÇ4, :6>?;, >?@ABCUÉ¿}ž。
                /0+,: n°S(1981-), /, ›ù˜…4, 56, 89, 56;<=, ª«†<CUÉ¿}ž>?。
   159   160   161   162   163   164   165   166   167   168   169