本文選題：FRP + 嵌入式��； 參考：《吉林建筑大學(xué)》2017年碩士論文

【摘要】：自上世紀八十年代以來,FRP作為一種新興的材料被越來越多的被應(yīng)用于工程構(gòu)件的加固中,最常見的FRP加固方式分為兩種:外貼式和嵌入式。最先被大量研究的是外貼式,嵌入式相比外貼式具有錨固效果明顯、耐腐蝕、受外界荷載干擾小、節(jié)省用料等優(yōu)點,因此國內(nèi)外學(xué)者做了大量試驗進行嵌入式加固的研究。目前,國內(nèi)嵌入式加固梁抗彎加固的研究成果較多,而研究嵌入式加固梁的抗剪加固則相對較少,因此本文主要研究FRP筋嵌入式加固鋼筋混凝土梁的抗剪性能。本文主要通過模擬結(jié)合試驗對照,設(shè)計了13根鋼筋混凝土梁(其中1根為對比梁,12根為加固梁),分別考慮FRP筋加固量、FRP筋嵌貼角度和初始荷載等參數(shù)對鋼筋混凝土梁抗剪性能的影響,將其中5根混凝土梁的模擬結(jié)果與試驗結(jié)果進行驗證,驗證結(jié)果比較吻合。根據(jù)以往FRP嵌入式加固梁的研究成果,參考箍筋的抗剪承載力計算公式,推導(dǎo)并擬合出在二次受力情況下FRP筋加固鋼筋混凝土梁的抗剪承載力計算公式。本文采用ABAQUS有限元分析軟件對FRP筋嵌入式加固損傷混凝土梁進行了建模,并對各試件進行了加載分析,結(jié)果表明:隨著FRP加固量的增大,鋼筋混凝土梁的抗剪承載力顯著提高;FRP嵌入角度為45°時較90°抗剪承載力有了顯著提高;在FRP筋加固鋼筋混凝土梁中,初始荷載值越大,最終的極限承載力越小,雖然差距不大,但是對于要求計算精度較高的設(shè)計,初始荷載的影響是不可忽略的。本文提出的FRP筋嵌入式加固損傷混凝土梁的抗剪承載力計算公式計算結(jié)果與模擬結(jié)果較吻合,可供研究者參考。
[Abstract]:Since the eighties of the last century, as a new material, FRP has been used more and more in the reinforcement of engineering components. The most common FRP reinforcement methods can be divided into two types: external mount and embedded. The first thing that has been studied is the external sticker, which has many advantages, such as obvious anchoring effect, corrosion resistance, little interference from external load, saving material and so on. Therefore, domestic and foreign scholars have done a lot of research on embedded reinforcement. At present, there are many researches on the flexural strengthening of embedded beams in China, but less on the shear strengthening of embedded beams. Therefore, this paper mainly studies the shear behavior of reinforced concrete beams strengthened with FRP bars. This article mainly through the simulation union experiment contrast, Thirteen reinforced concrete beams (one of which is a contrast beam and 12 beams) are designed to reinforce the beams. The effects of the reinforcement angle and initial load on the shear behavior of the reinforced concrete beams are considered, respectively. The simulation results of 5 concrete beams are compared with the experimental results. According to the previous research results of FRP embedded strengthened beams and referring to the formula of shear bearing capacity of stirrups, the formulas of shear bearing capacity of reinforced concrete beams strengthened with FRP bars under secondary loading are deduced and fitted. In this paper, the ABAQUS finite element analysis software is used to model the damaged concrete beams strengthened with FRP bars. The results show that with the increase of the amount of FRP reinforcement, the load analysis of each specimen is carried out. The shear bearing capacity of reinforced concrete beams is significantly improved when the embedding angle is 45 擄, and the ultimate bearing capacity of reinforced concrete beams strengthened with FRP bars is smaller, although the difference is small. However, the effect of initial load should not be ignored for the design with high accuracy. The calculation results of shear capacity of damaged concrete beams strengthened with FRP bars are in good agreement with the simulation results, which can be used as a reference for researchers.
【學(xué)位授予單位】：吉林建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU375.1

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