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1、88橋梁建設(shè)2016年第46卷第6期(總第241期)BridgeConstruction，V01．46，No．6，2016(TotallyNo．241)文章編號(hào)：1003—4722(2016)06—0088—06鋼管混凝土拱橋強(qiáng)健性設(shè)計(jì)陳寶春1，范冰輝1，余印根2，吳慶雄1，黃冀卓1(1．福州大學(xué)土木工程學(xué)院，福建福州350108；2．福建福永工程技術(shù)有限公司，福建福州350011)摘要：為解決中、下承式鋼管混凝土拱橋橋面系強(qiáng)健性不足的問題，從概念設(shè)計(jì)和結(jié)構(gòu)設(shè)計(jì)的角度提出強(qiáng)健性設(shè)計(jì)的要點(diǎn)?？偨Y(jié)結(jié)構(gòu)強(qiáng)

2、健性的概念及其在橋梁工程中的應(yīng)用，按嚴(yán)重程度將拱橋斷索事故分為三級(jí)，據(jù)此提出吊桿不破斷、橋面系在吊桿破斷時(shí)不落梁的強(qiáng)健性設(shè)計(jì)要求。基于強(qiáng)健性將不同結(jié)構(gòu)的橋面系分為五類，在此基礎(chǔ)上對(duì)橋梁主結(jié)構(gòu)的強(qiáng)健性設(shè)計(jì)提出建議：對(duì)于吊桿，應(yīng)進(jìn)行強(qiáng)健性設(shè)計(jì)對(duì)應(yīng)的破壞安全極限狀態(tài)設(shè)計(jì)計(jì)算；對(duì)于第四類橋面系，其加勁縱梁需要具備足夠的剛度與承栽力；對(duì)于剛架系桿拱，應(yīng)加強(qiáng)系桿的強(qiáng)健性設(shè)計(jì)，并應(yīng)使下部結(jié)構(gòu)具有足夠的抗水平推力的安全儲(chǔ)備。關(guān)鍵詞：拱橋；鋼管混凝土結(jié)構(gòu)；橋面系；吊桿；主拱；強(qiáng)健性設(shè)計(jì)；破壞安全極限狀態(tài)中圖分類號(hào)：U

3、448．22；U442．5文獻(xiàn)標(biāo)志碼：ARobustnessDesignofConcrete-FilledSteelTubeArchBridgesCHENBao-chun1，F(xiàn)ANBing-hui1，ⅧYin-gen2，WUQing—xiong1．HUANGji—zhuo1(1．CollegeofCivilEngineering，F(xiàn)uzhouUniversity．Fuzhou350108。China：2．FujianFuyongEngineeringTechnologyCo．，Ltd．，F(xiàn)uzhou

4、350011，China)Abstract：Toresolvetheproblemregardingtheinsufficientrobustnessofthefloorsystemsonthehalf—throughandthroughconcrete-filledsteeltubearchbridges，thehighlightsoftherobust—nessdesignarepresentedfromtheangleoftheconceptualdesignandstructuraldesi

5、gnandthecon—ceptofthestructuralrobustnessandtheapplyingoftheconcepttOthebridgeengineeringaresummedup．Thefailureofthehangerbreakingofthearchbridgesisclassifiedintothreelevelsac—cordingtOtheseveritydegreesofthefailureandfurtheraccordingtOtheclassificatio

6、n，therequire—mentsfortherobustnessdesignofthefloorsystemsunderthesituationsthatthehangersdonotbreakandthatthehangersbreak，butthegirdersdonotcollapsearesetforward．Intermsoftheconceptoftherobustness，thefloorsystemsofthedifferentstructuresareclassifiedint

7、ofivetypesandonthebasisoftheclassification，therobustnessdesignofthemainstructuresofthearchbridgesisproposed．Forthehangers，thefailuresafetylimitstatecorrespondingtOtherobustnessdesignshouldbedesignedandcalculated．Forthefloorsystemtypefour，thestiffenings

8、tringersofthefloorsystemshouldhavesufficientrigidityandbearingcapacityandfortherigid—frametiedarchbridge，therobustnessdesignofthetiemembersofthebridgeshouldbereinforcedandthesubstructureofthebridgeshouldbemadetOhavethesufficientsafetyma