本文選題：加固 + 模型試驗(yàn)��； 參考：《長(zhǎng)安大學(xué)》2017年碩士論文

【摘要】：纖維織物網(wǎng)—聚合物砂漿加固(TRC)是一種用聚合物砂漿將高強(qiáng)纖維織物網(wǎng)粘結(jié)至混凝土表面的加固技術(shù)。與常規(guī)FRP加固鋼筋混凝土結(jié)構(gòu)技術(shù)相比,TRC加固技術(shù)因使用聚合物砂漿這種水泥基無(wú)機(jī)凝膠材料,能夠與原結(jié)構(gòu)混凝土相互滲透并更好地相容,同時(shí)具有耐高溫、能夠用于水下環(huán)境等諸多優(yōu)點(diǎn)。本文首先利用自主開(kāi)發(fā)的TRC粘貼強(qiáng)度綜合測(cè)試儀進(jìn)行19組雙剪試驗(yàn),試驗(yàn)研究了纖維網(wǎng)有效粘貼長(zhǎng)度、纖維網(wǎng)浸膠、粘砂以及纖維網(wǎng)凈距等因素對(duì)粘貼性能的影響,并在此試驗(yàn)基礎(chǔ)上建立了TRC粘結(jié)強(qiáng)度計(jì)算公式,推薦了一種可靠的粘貼方法—纖維網(wǎng)粘砂錨固粘貼。其次,本文還進(jìn)行了1片對(duì)比梁和3片TRC加固梁的靜力抗彎加載試驗(yàn),研究了纖維網(wǎng)表面未處理、浸膠以及粘砂處理對(duì)T梁抗彎性能的影響。最終在完成上述兩項(xiàng)試驗(yàn)的基礎(chǔ)上得出以下結(jié)論:(1)聚合物砂漿抗壓強(qiáng)度對(duì)TRC加固層粘結(jié)性能有重要影響,當(dāng)砂漿抗壓強(qiáng)度較高時(shí)可使纖維有效粘結(jié)長(zhǎng)度減小;(2)本文推薦使用纖維網(wǎng)表面粘砂處理方式來(lái)控制纖維網(wǎng)的滑移,同時(shí)可以有效提升界面粘結(jié)強(qiáng)度。在保證有效粘結(jié)長(zhǎng)度的前提下,對(duì)纖維網(wǎng)表面進(jìn)行浸膠及粘砂處理可使粘結(jié)強(qiáng)度提高23.5%;(3)對(duì)T梁采用TRC加固后,加固梁與對(duì)比梁在彈性工作階段剛度相近,但在屈服—破壞階段加固纖維發(fā)揮了較大作用。采用最大加固量時(shí)(雙層加固)可使結(jié)構(gòu)剛度顯著提高,同時(shí)極限承載能力提高24.4%,但對(duì)結(jié)構(gòu)的加固使得其延性有所降低;(4)對(duì)TRC加固T梁極限承載力進(jìn)行理論計(jì)算,到達(dá)極限強(qiáng)度前將纖維束視為線彈性材料,計(jì)算結(jié)果與試驗(yàn)值吻合較好。
[Abstract]:Fiber fabric network-polymer mortar reinforcement (TRCC) is a kind of strengthening technology which uses polymer mortar to bind high strength fiber fabric mesh to concrete surface. Compared with the conventional reinforced concrete strengthening technology, the polymer mortar, which is a cement based inorganic gel material, is more compatible with the original structure concrete and has high temperature resistance. Can be used in underwater environment and many other advantages. In this paper, 19 groups of double shear tests were carried out by using the self-developed TRC adhesive strength comprehensive tester. The effects of the effective adhesive length of the fiber mesh, the impregnation of the fiber network, the adhesive sand and the net spacing of the fiber mesh on the adhesive properties were studied. On the basis of this experiment, the formula for calculating the bond strength of TRC is established, and a reliable bonding method, that is, Anchorage and bonding of fibre-net bonded sand, is recommended. Secondly, the static flexural loading tests of one contrast beam and three TRC strengthened beams were carried out, and the effects of untreated surface of fiber mesh, soaking glue and sand on the flexural properties of T-beam were studied. Finally, on the basis of the above two tests, the following conclusions are drawn: (1) the compressive strength of polymer mortar has an important effect on the bond properties of TRC strengthened layer. When the compressive strength of mortar is high, the effective bond length of fiber can be reduced. On the premise of ensuring the effective bond length, the adhesive strength can be increased by soaking and sand bonding on the surface of the fiber mesh. After the T beam is strengthened by TRC, the stiffness of the strengthened beam and the contrast beam in the elastic working stage is close to that of the contrast beam. But in the yield-failure stage reinforcement of the fiber played a greater role. When the maximum reinforcement is adopted (double layer reinforcement), the stiffness and ultimate bearing capacity of T beam strengthened by TRC can be increased significantly, and the ultimate bearing capacity of T beam strengthened by TRC can be increased by 24. 4%, but the ductility of the structure is reduced by strengthening the structure. The theoretical calculation of ultimate bearing capacity of T beam strengthened by TRC is carried out. The fiber bundle is regarded as a linear elastic material before reaching the ultimate strength, and the calculated results are in good agreement with the experimental values.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U445.72

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本文編號(hào)：1960548