FRP-螺栓聯合加固論文：FRP-螺栓聯合加固錨固粘結粘結長度抗彎承載能力

1、FRP 螺栓聯合加固論文：FRP 螺栓聯合加固 錨固粘結 粘結長 度抗彎承載能力【中文摘要】混凝土結構防護與加固技術目前已引起全世界的關 注，而 FRP-螺栓聯合加固技術正是解決此問題的行之有效的方法之 一。FRP-螺栓聯合加固法是一種全新的混合加固方法，為既有損傷混 凝土結構的維修加固提供一種更加安全、 高效、便捷、經濟的新技術, 對提高混凝土的承載能力、延長其使用壽命具有重要的理論和現實意 義。由于由于該項技術處于初期開發(fā)階段，關于其關鍵技術參數、施 工工藝、力學性能的研究成果基本為空白，因此，對 FRP-螺栓聯合加 固技術進行系統研究具有明顯的創(chuàng)新性。為更好的發(fā)揮 FRP 加固技術 的優(yōu)

2、勢,改進傳統表面粘貼 FRP加固技術的缺陷，解決 FRP 加固技術中 存在的 FRP 和混凝土黏結強度不足的問題，本文在采用 FRP 螺栓聯合 錨固法的基礎上，對比傳統 FRP 加固混凝土技術，分別對 FRP-螺栓聯 合加固技術的粘結性能及抗彎性能進行了試驗研究。通過研究，為 FRP-螺栓聯合加固技術的應用推廣提供依據。 通過大量預制梁剪切試 驗確定 FRP 螺栓聯合加固技術法粘結性能技術參數，運用 ANSYS+算 軟件,采用螺栓預緊單元及面對面的接觸分析，模擬不同螺栓預緊力 的條件下 FRP-螺栓聯合加固試驗梁的黏結剪切應力分布情況，最后提 出 FRP 粘貼長度的計算公式。通過室內試驗及結果

3、分析，比較不同加 固方法梁的荷載-撓度曲線,梁的開裂荷載，梁的延性,梁的裂縫發(fā)展 規(guī)律及梁的破壞形式，明確 FRP 螺栓聯合加固混凝土梁抗彎加固效【英文摘要】 Con crete structure protecti on andreinforcement technique currently has caused worldwide concern, andFRP-bolts joint reinforcement technique is one of the most effectivemethods to solve this problem. FRP-bolt jo intrein

4、 forceme nt method is a new hybrid rein forceme nt method for thedamaged con crete structure, which offers a more safe, efficie nt,convenient and econo mic new tech no logy for the maintenance and reinforceme nt con crete structures, and it is of important significanee in boththeoretical and practic

5、al inImproving the bearing capacity of the concrete, and prolong the service life.Because the tech no logy is at the early stage of developme nt, theresearch results of its key tech no logy parameters on mecha ni calproperties, con structi on tech no logy are basically bla nk, therefore, thesystemat

6、ic research of FRP-bolt jo int rein forceme nt tech nique hasobvious inno vati onn order to better play the adva ntage of the FRP reinforceme nt tech niq ue, impro ving the defects of the traditi onal surfacestickup of FRP rein forceme nt tech niq ue, solving the problem ofinsufficientin the bond st

7、rength of FRPand con crete, this paper studied both the an chor bond properties and anti-flex properties of FRP-bolts joi nt rein forceme nt tech nique based onthe FRP-bolts joi ntrein forceme nt tech niq ue, compari ng with the traditi onal FRP reinforced con crete tech no logy. The study provides

8、basis for populariz ing ofFRP-bolts joi nt re in forceme nttechnique.Through a lot of precast beamsto determine the shear tests ofFRP-bolt jo int rei nforceme nt tech nique method bond properties tech nical parameters, by using ANS YS calculati on software, bolt pre-tighte ningun it and face-to-face

9、 con tact analysis, and simulating differentbolts ofprestressing forceof joint bolt FRP-under the condition of strengtheningthe bondexperime ntal beams shear stress distributio n, fin ally puts forward thecalculation formula of FRPpaste length.Through the laboratory test and analysis of the results, compari ng differe nt rei nforceme nt method of beamload curve, and beam crack deflection, the ductility of the load, beam ofcrack developme nt regularity and beam, made clear the partial-que nchedof lia ng FRP-bolt jo int rein forced con crete beam b