钢筋混凝土梁的损伤评估-检测技术与自动化装置专业论文.docxVIP

河南大学研究生硕士学位论文Damage 河南大学研究生硕士学位论文 Damage EValuatiOn of Reinforced Concrete Beams Speciany： Dete嘶ve technology孤d autom鲥c device Au血or： Guo Hai吐u Ad、risor：PrO￡Zhao J1】n Abs衄ct The血emalmicro-crack缸dholeofconcrete are鼬ally damaged ca雌edbyl∞ds，suppon 们nsk出on，衄nper栅ch柚gc咖，，which rcsub iIl damage船d如血ess decline of concrete． 1h∞nleInbers锄d s仃1袖lres ared锄aged∞d des廿0ycdby all aboVe re鹊∞s．B∞ed帆血ese，th。 damage index systcm on m砷砸als，cross．section，m铷1bers锄d蚰ⅥchⅡes is esta_bIiShed．on tlle basis of tlle站出c elastic_plas石c柚alysis 0n sinlply suppon砌beams蛐d c锄tilluaw beams by 删，The d锄age ofRC beams is evaIuated by using the damage i11dcx system，Some qu柚石协Ⅱve sugges廿0ns are ofrercd for seismic designing，mu咖l r印ai血g a11d reinforc王ng etc．Four par乜0Ⅱ RC beams d啦age are m豳ly gtIldied勰follow． (1)A d锄age ind旺of concrefe b嬲ed on廿1e decl-me of s廿ah韶s is establishe正The g∞eral relat．on khve曲血e d砌_age彻d s廿ain of the beam cr0骆一sectioⅡis set up蚰dⅡ1e s骶ss—s们_in curves Of crDss—sec石衄are made，血rough the雒alysis On cmss‘s鳅ion bal锄ce．Th如the cross-scctioⅡdamage证dex is de血ediⅡcIl|mng ordinary concrete cross_section，preg嘲sed con州e cro鹦一s耐0n姐d unload如g concrete cfoss．se枷on．The concrete d锄age of simply supp呷ccd beams caⅡbe e眠虹vely ass船sed by these铆o de丘ning damage me血ods．The resub show that both m劬ods are诧越ible龃d close to咒ality by maly五ng the whole damage process of simply supponed pres仃essed Rc bea脚蛆d Rc bea础H恤ch have di腩rent rejnfbrced州os柚d 10ads． (2)1he general f．mk element menlod’s equ撕om on the s扭石c e1嬲血_plasttc dalnage evaluation of sⅡuctures are d甜uced by Ilsing the咖al woIk p血ciple．Then a damage index sysoem锄itabk to a11level d锄age evalua廿on is bllin b船ed on t11e decIine ofthe resist锄t sd丘hess ofcmss．se嘶om thB me珂【ber’s蚶舫ess锄d the whole sti丘hess ofstm吐山．es．And也e啪m caⅡbe expr。ssed wi也d觚1age m删xes，Which f0Ims a clear锄d intact d曲曲fo眦damage evaluated melhodo丘briⅡg pmccical b船is of qu卸廿髓tioⅡfor seisnlic designseismic reinforcement and rcpair ofbuildings a舭r eamlquakes． (3)m order to solve the negative sn肋