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1、第44卷第11期土木工程學(xué)報(bào)Vo1.44No.112011年11J】CHINACIVILENGINEERINGJOURNALNov.20l】考慮荷載應(yīng)力分布的機(jī)場(chǎng)剛性道面累積損傷優(yōu)化模型王振輝,蔡良才顧強(qiáng)康吳愛(ài)紅(1.空軍程大學(xué),陜西兩安710038;2.窄軍第六工程總隊(duì),湖南衡陽(yáng)421001)摘要:分析美FAA道面設(shè)計(jì)法和利用通行覆蓋率計(jì)算道面累積損傷存在的缺陷,提}{I剛性道面累積損傷模型須考慮道而板荷載膻分布的影響。提飛機(jī)對(duì)道面的作用以覆蓋作用曲線表示,且服從正態(tài)分布規(guī)律,根據(jù)主起落架構(gòu)的等效原則,得到覆蓋作用曲線和
2、總通行覆蓋次數(shù)的確定方法;研究道面板荷載應(yīng)力的分布規(guī)律,以荷載作』H佗lI】心點(diǎn)至道板縱向中心線的橫向距離板寬的比例為參數(shù),將道面板縱向上各點(diǎn)的荷載應(yīng)的最大值映射劍板的橫邊,建立道板橫向應(yīng)力分布函數(shù);利用覆蓋作用曲線與應(yīng)力分布數(shù)建審道面板的累積損傷優(yōu)化模,實(shí)例驗(yàn)證模的正確性,該模型可應(yīng)用于剛性道面結(jié)構(gòu)和道面分塊的優(yōu)化設(shè)計(jì)‘。關(guān)鍵詞:剛性道面;混合交通;累積損傷;通行覆蓋率;荷載應(yīng)力;優(yōu)化模型中圖分類號(hào):V351.11U416.216文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1000—131X(2011)11-0143-08Airportri
3、gidpavementcumulativedamageoptimizationmodelconsideringloadstressdistributionWangZhenhui·。CaiLiangcaiGuQiangkangWuAihong(1.AirForceEngineeringUniversity,Xi’an710038,China;2.SixthAirForceEngineeringCorps,Hengyang421001,China)Abstract:Problemsofthepavementdesignmeth
4、odofFederalAviationAdministrationandpavementcumulativedamagecalculationbypass—to—coverageratioareanalyzed,anditispointedoutthatloadstressdistributioninpavementslabshouldbeconsideredinrigidpavementcumulativedamagemode1.Behaviorofairplaneonpavementcanberepresentedby
5、acoveragecurveofanormaldistribution.Basedontheequivalenceprincipleofmaingearconfiguration,coveragecurveandtotalpass—to—coveragetimescanbeobtained.Pavementloadstressdistributionpatternisanalyzed,takingtheratiooftransversedistancebetweenloadcenterandlongitudinalcent
6、erlineofpavementslabtowidthastheparameterandmappingthelongitudinalloadstressmaximumtothetransverseborderofslab,andaloadstressdistributionfunctionisestablished.Basedoncoveragecurvefunctionandloadstressdistributionfunction,apavementcumulativedamageoptimizationmodeli
7、sestablishedandverifiedthroughexample.Themodelcanbeappliedtooptimizepavementstructuredesignandslabsizedesign.Keywords:rigidpavement;mixedtraffic;cumulativedamage;pass—to—coverageratio;loadstress;optimizationmodelE.mail:buttur521@163.eom面結(jié)構(gòu)的計(jì)算荷載比較確定道面設(shè)計(jì)的厚度,此階段引日飛機(jī)的
8、當(dāng)量運(yùn)行次數(shù)換算方法不當(dāng)導(dǎo)致采用不同的設(shè)計(jì)飛機(jī)得到不同的道面設(shè)計(jì)厚度¨引。最新軍用機(jī)早期國(guó)內(nèi)機(jī)場(chǎng)道面設(shè)計(jì)以某一種機(jī)型作為道面場(chǎng)道面設(shè)計(jì)規(guī)范根據(jù)累積損傷的Miner準(zhǔn)則改進(jìn)了飛的設(shè)計(jì)機(jī)型,假定機(jī)輪的輪跡在通行寬度內(nèi)均勻分機(jī)的當(dāng)量運(yùn)行次數(shù)換算方法,民航機(jī)場(chǎng)道面設(shè)計(jì)規(guī)范布,根據(jù)設(shè)計(jì)壽命內(nèi)設(shè)計(jì)飛機(jī)的累積重復(fù)作用