土木畢業(yè)設(shè)計外文翻譯--近表面埋置加固的鋼筋混凝土梁抗彎性能實驗研究-免費閱讀
【正文】 考慮到相同的橫截面面積， NSM試樣加固效果優(yōu)于 EBR的 試件 。檢查的 FRP極限應(yīng)變總結(jié)在表 3中，最大應(yīng)變?yōu)?EBR的 試件 似乎達到 30％的極限應(yīng)變， 80到 100 NSM％的 試件 。失敗對 NSM特等 15，NSM試件 ，用玻璃 鋼加固破裂發(fā)生。電電阻應(yīng)變計固定在跨中和 1 / 4來衡量鋼筋應(yīng)變。槽空間： 120 安裝玻璃鋼筋 圖 2顯示了跨越部分的 試件 的細節(jié)。 8 圖 1試件 的細節(jié)表示 圖表 1試驗梁的屬性 材料 性能 混凝土 抗壓強度（ MPa） 張力鋼加強 （ D10中） 屈服強度（ MPa） 426 拉伸強度（ MPa） 562 直徑（毫米） 面積（ cm2） 壓縮鋼加固 （ D13號） 屈服強度（ MPa） 481 拉伸強度（ MPa） 608 直徑（毫米） 面積（ cm2） 碳纖維帶 （光滑表面） 厚度（毫米） 拉伸強度（ MPa） （ GPA）的彈性模量 極限應(yīng)變（％） 實驗參數(shù) 表 2列出了實驗參數(shù)。 為了便于比較， 關(guān)于 鋼筋混凝土簡支梁的抗彎試驗 EBR的和 NSM開始做了 。然而，容易受腐蝕的鋼筋和灌漿材料的膠合性能較差損害了其應(yīng)用。 實驗結(jié)果表明，用碳纖維增強材料 NSM 試件 比 EBR試件 更有效。 1 AN EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF RC BEAMS STRENGTHENED WITH NSM REINFORCEMENT WooTai JUNG1, YoungHwan PARK2, JongSup ABSTRACT: This study presents the results of experiments performed on RC (Reinforced Concrete) beams strengthened with NSM(Near Surface Mounted) reinforcement. A total of 6 specimens have been tested. The specimens can be classified into EBR(Externally Bonded Reinforcement) specimen and NSM reinforcements specimens. Two NSM specimens with space variables were strengthened with 2 CFRP(Carbon Fiber Reinforced Polymer) strips. Experimental results revealed that NSMspecimens used CFRP reinforcements moreefficiently than the EBR specimens. Even if CFRP crosssection areas of NSM specimens have 30%,50% of EBR Specimen, the strengthening effect of NSMspecimens is superior to EBR specimen. NSM specimens with space variables showed that thstrengthening effect of the specimen with narrow space is slightly increased as pared to thespecimen with wide spaceu KEYWORDS: carbon fiber reinforced polymer, externally bonded CFRP reinforcements, nearsurface mounted CFRP reinforcements, strengthening 1. INTRODUCTION Among the various strengthening techniques that have been developed and applied to strengthendeteriorated RC structures, a number of applications using FRP reinforcements have significantly increased recently. FRP reinforcements are bonded to concrete surfaces by adhesives but frequently experience debonding failure at the interface between FRP reinforcements and concrete. Most research, to date, has focused on investigating the strengthening effects and failure modes of EBR system The problem of premature failure of EBR system may be solved by increasing the interface between FRP and concrete. Using this principle, the NSM system has been introduced recently. The NSM system for concrete structure using steel reinforcement already began in 1940s. However, the corrosion of the steel reinforcement and the poor bonding performance of the grouting material largely impaired its application. The development of improved epoxy and the adoption of FRP reinforcement offered the opportunity to implement NSM system (Hassan and Rizkalla 2021。即使 NSM 試件 斷面 面積是 EBR的30％ 和 50％， 其效果也優(yōu) 于 EBR試件 。 提高環(huán)氧樹脂的發(fā)展和采用玻璃鋼加固所提供的機會實施 NSM（ Hassan
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