中英具有混合纖維增強(qiáng)塑料片的混凝土梁–柱聯(lián)接部位的加固節(jié)選

外文翻譯1外文原文出處：KennethZammit,UniversityofMalta.June2003具有混合纖維增強(qiáng)塑料片的混凝土梁–柱聯(lián)接部位的加固（節(jié)選）摘要：本篇文章描述了對(duì)加固后標(biāo)準(zhǔn)尺寸混凝土結(jié)構(gòu)試件進(jìn)行試驗(yàn)的結(jié)果，該試件代表平面框架結(jié)構(gòu)中的梁–柱聯(lián)接部位。設(shè)計(jì)試驗(yàn)的目的是為了研究在靜載條件下纖維增強(qiáng)塑料被應(yīng)用到梁–柱聯(lián)接部位外表面附近時(shí)對(duì)所測(cè)試件的影響。特別令人感興趣的是在靜載條件下應(yīng)用纖維增強(qiáng)塑料對(duì)增強(qiáng)梁–柱聯(lián)接部位所起的作用。作為研究的關(guān)鍵，為了從外部對(duì)混凝土的連接部分進(jìn)行加固，設(shè)計(jì)了帶有E玻璃無(wú)捻粗紗布和碳布的混合纖維增強(qiáng)塑料復(fù)合物，并且該復(fù)合物結(jié)合了短貼原絲氈和帶有乙烯基酯樹脂的玻璃纖維帶。結(jié)果顯示，對(duì)于應(yīng)用纖維增強(qiáng)塑料改進(jìn)過(guò)的混凝土結(jié)構(gòu)的關(guān)鍵部分能夠?qū)炷两Y(jié)構(gòu)的強(qiáng)度和硬度起到增強(qiáng)的作用，同時(shí)也能夠起到在不同類型荷載條件下增強(qiáng)它們的效果。同時(shí)，本篇文章也討論了為改進(jìn)和增強(qiáng)混凝土結(jié)構(gòu)的強(qiáng)度和硬度而如何選擇纖維增強(qiáng)塑料和結(jié)構(gòu)類型。關(guān)鍵詞：混凝土結(jié)構(gòu)；加固；修復(fù)；混合纖維增強(qiáng)塑料；繞接技術(shù)1.前言為了對(duì)混凝土結(jié)構(gòu)進(jìn)行改進(jìn)，一個(gè)被廣泛采用的技術(shù)是使用鋼外套管放置于現(xiàn)有混凝土柱的周圍，這種使混凝土產(chǎn)生側(cè)向限制的技術(shù)已經(jīng)被廣泛的研究[1，2]；而且已經(jīng)顯示重縮載重承載量和混凝土柱的延性增加。然而，這一個(gè)技術(shù)的缺點(diǎn)是它在實(shí)際的應(yīng)用受到來(lái)自腐蝕和固有的缺點(diǎn)。另一方面，纖維增強(qiáng)塑料日益被采用來(lái)加固混凝土，磚石和木結(jié)構(gòu)。通過(guò)關(guān)鍵部分的外表面采用纖維增強(qiáng)塑料來(lái)加固結(jié)構(gòu)，能夠很明顯提高結(jié)構(gòu)的載重量和結(jié)構(gòu)的效用。最近幾年，纖維增強(qiáng)塑料的材料類型更加的廣泛，有玻璃纖維、碳纖維等。它們提供給設(shè)計(jì)者一個(gè)使用的、有效的構(gòu)造材料，這些材料具有范圍很廣的模數(shù)和強(qiáng)度的特性。和傳統(tǒng)的加固技術(shù)相比，纖維增強(qiáng)塑料復(fù)合物具有特別高的強(qiáng)度和硬度，以及設(shè)計(jì)上的靈活性、在不利的環(huán)境中的可替代性、較強(qiáng)的韌性等優(yōu)點(diǎn)。通過(guò)優(yōu)化材料組成和結(jié)構(gòu)，使得纖維增強(qiáng)塑料達(dá)到最好的加固效果是可能的，同時(shí)也是必要的。為了在實(shí)際的加固過(guò)程中充分利用纖維增強(qiáng)塑料的優(yōu)點(diǎn)，優(yōu)化組成材料和結(jié)構(gòu)是非常必要的。研究表明，正方形混凝土柱周圍的碳纖維/環(huán)氧基樹脂能夠使其負(fù)載能力增加8%—22%，而這種能力的增強(qiáng)是依賴于大量纖維的使用以及對(duì)基層表面的處理。樹脂注入技術(shù)的使用表明其對(duì)繞接效果的改進(jìn)起了非常重要的作用,研究表明，當(dāng)使用玻璃無(wú)捻粗紗布來(lái)增強(qiáng)繞接效果時(shí)，不僅能顯著提高混凝土的負(fù)載能力同時(shí)也能夠增加混凝土短支柱的變形抵抗能力。此外，通過(guò)使用帶有環(huán)氧樹脂的玻璃/碳混合增強(qiáng)材料來(lái)加固混凝土，當(dāng)對(duì)混凝土柱進(jìn)行反復(fù)的試驗(yàn)來(lái)檢測(cè)它的最初性能時(shí)，發(fā)現(xiàn)它的負(fù)載能力進(jìn)一步的提高了。根據(jù)復(fù)合物彎曲的方位和厚度，表明在套箍位置處進(jìn)行加固會(huì)產(chǎn)生更好的效果。盡管已經(jīng)進(jìn)行了大量的研究，但是大多數(shù)研究中都存在一個(gè)不足之處，即他們所做的試驗(yàn)僅限于形狀較小較簡(jiǎn)單的結(jié)構(gòu)，如混凝土圓柱體，而不是真正的結(jié)構(gòu)。此外，有必要根據(jù)成本其中包括材料和處理方法來(lái)研究使組合結(jié)構(gòu)達(dá)到最優(yōu)化。這就表明，當(dāng)使用纖維增強(qiáng)塑料來(lái)進(jìn)行基礎(chǔ)加固時(shí)，應(yīng)該使用各種材料的優(yōu)點(diǎn)，不僅僅是帶有環(huán)氧樹脂的碳纖維，同時(shí)也應(yīng)該包括玻璃纖維或帶有其它聚合樹脂的碳/玻璃纖維的復(fù)合物，在這個(gè)試驗(yàn)中為了加固一個(gè)典型的建筑部分，即梁–柱聯(lián)接部位，設(shè)計(jì)了一個(gè)帶有乙烯基酯樹脂的碳/E玻璃復(fù)合物。為了研究帖有纖維增強(qiáng)塑料對(duì)構(gòu)件的影響，在靜載條件下，分別對(duì)通過(guò)纖維增強(qiáng)塑料加固后的試件和沒(méi)有加固的試件進(jìn)行了大量的試驗(yàn)。研究報(bào)告是一個(gè)合作研究項(xiàng)目的一個(gè)組成部分，該項(xiàng)目是有悉尼理工大學(xué)、高級(jí)材料技術(shù)中心和悉尼大學(xué)共同合作研究的關(guān)于應(yīng)用高級(jí)纖維復(fù)合物來(lái)增大混凝土的強(qiáng)度和硬度，由此來(lái)對(duì)混凝土結(jié)構(gòu)進(jìn)行加固。4．結(jié)論作為研究的結(jié)果，列出了以下結(jié)論：1．對(duì)加固后標(biāo)準(zhǔn)尺寸混凝土結(jié)構(gòu)試件進(jìn)行試驗(yàn)已經(jīng)被成功地處理，所設(shè)計(jì)的試件代表了平面框架結(jié)構(gòu)中的梁–柱聯(lián)接部位。通過(guò)平衡校核證明了由該試驗(yàn)所得出的結(jié)論。2.由無(wú)捻粗紗布、碳布、短貼原絲氈和玻璃纖維帶組成的復(fù)合物有效地證明了纖維增強(qiáng)塑料對(duì)混凝土結(jié)構(gòu)試件的加固效果。試驗(yàn)的結(jié)果表明由于使用了纖維增強(qiáng)塑料復(fù)合物使得混凝土的硬度和負(fù)載能力有了明顯的提高。結(jié)果也表明用較低的成本加強(qiáng)混凝土結(jié)構(gòu)并且使其達(dá)到較好的效果，使結(jié)構(gòu)達(dá)到最優(yōu)化是很重要的。碎3.膊碼靜載試驗(yàn)的結(jié)茫果也表明具有詢較低彈性模量什的混合碳懂/制E見(jiàn)玻璃纖維復(fù)合截物可能會(huì)提供沿更好的連接。電然而，這需要京被更多的試驗(yàn)誕證明。晨4胳．研究也表明娛應(yīng)該進(jìn)行進(jìn)一鉗步的研究，其獻(xiàn)中包括加固被費(fèi)破壞的混凝土甚結(jié)構(gòu)試件，循免環(huán)荷載和使用覆不同的結(jié)構(gòu)類脖型騎。外文原文1偷Reinfo衣rcemen脾t地振ofcon偵crete陰蜜bea存m愈–它c(diǎn)olumn揉conne屠ctions父with統(tǒng)hybrid擋殘F(tuán)RPsh救eet質(zhì)Kennet圈hZamm定it,形Univer譜sityo哨fMalt卻a.Jun啞e2003剝Abstra糾ct炎惑：烤T悟hepap第erdes信cribes溜ther隨esults凈ofte督stson俱proto效types壺izere姜inforc項(xiàng)edcon佛crete爺frame醋specim析enswh冤ichwe悼redes舍igned用torep戰(zhàn)resent雁thec肯olum啟n堡–伏beamc培onnect晉ionsi拌nplan所efram媽es.Th忘etest絹swere辦devis者edto俱invest止igate筐thein渾fluenc喂eoff席ibrer暴einfor爆cedpl菜astic劉(銜FRP燈貌reinfo現(xiàn)rcemen處tappl風(fēng)iedto擔(dān)exter接nalsu厘rfaces距adjac凝entto枝the活bea銅m災(zāi)–陰column敘捆connec衰tiono妥nthe匙behavi任ourof革thet犯estsp坐ecimen經(jīng)sunde償rstat功icloa正ding.怠Ofpar多ticula趁rinte培restu闊nders煉tatic茶loadin愁gwas叫thein源fluenc之eof覽FRP霞reinf惰orceme脈nton話thest舅rength皆ands剃tiffne唉ssof碗bea農(nóng)m機(jī)–維column依conne上ction.吹A(chǔ)sa座keyto稅thes鄭tudy,躁thehy未brid確FRP展層compos貢iteso郊fE-gl抗asswo干venro盯ving(慈WR)an擊dplai副ncarb虛onclo底th,co羞mbined唱with沸choppe叫dstra碧ndmat冤(CSM)練,glas椒sfibe搖rtape族(GFT)蒜with狐aviny伙l-este障rresi羨nwere插desig轉(zhuǎn)nedto蕉exter椅nally曉reinfo波rceth召ejoin夢(mèng)toft困hecon較crete坡frame.姻Ther漠esults紐show柱thatr唉etrofi月tting疫critic算alsec冶tions渡ofcon馬crete鞠frames績(jī)with羊FRP柴畏reinfo濱rcemen販tcan說(shuō)provid稍esign鴿ificat期ionst濾rength姻ening味andst諒iffeni淡ngto抗concre者tefra僚mesan冠dimpr練oveth世eirbe冤haviou攝runde支rdiff體erent屠types市ofloa炎ding.她These像lectio域nsof象types勢(shì)of常FRP傾andt煉hearc循h(huán)itect毫ureof長(zhǎng)compo辰sites球inord朗erto爆improv泄ethe鍛bondin捎gand址streng懸thof茫there停tro-fi筑tting僵werea絕lsodi廁scusse探d.剪Author艦Keywo隆rds否:喇Concre剛testr課ucture票;Stre光ngthen硬ing;R該ehabil室i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