本文選題：加固 + 模型試驗�。� 參考：《長安大學》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機凝膠材料,能夠與原結(jié)構(gòu)混凝土相互滲透并更好地相容,同時具有耐高溫、能夠用于水下環(huán)境等諸多優(yōu)點。本文首先利用自主開發(fā)的TRC粘貼強度綜合測試儀進行19組雙剪試驗,試驗研究了纖維網(wǎng)有效粘貼長度、纖維網(wǎng)浸膠、粘砂以及纖維網(wǎng)凈距等因素對粘貼性能的影響,并在此試驗基礎上建立了TRC粘結(jié)強度計算公式,推薦了一種可靠的粘貼方法—纖維網(wǎng)粘砂錨固粘貼。其次,本文還進行了1片對比梁和3片TRC加固梁的靜力抗彎加載試驗,研究了纖維網(wǎng)表面未處理、浸膠以及粘砂處理對T梁抗彎性能的影響。最終在完成上述兩項試驗的基礎上得出以下結(jié)論:(1)聚合物砂漿抗壓強度對TRC加固層粘結(jié)性能有重要影響,當砂漿抗壓強度較高時可使纖維有效粘結(jié)長度減小;(2)本文推薦使用纖維網(wǎng)表面粘砂處理方式來控制纖維網(wǎng)的滑移,同時可以有效提升界面粘結(jié)強度。在保證有效粘結(jié)長度的前提下,對纖維網(wǎng)表面進行浸膠及粘砂處理可使粘結(jié)強度提高23.5%;(3)對T梁采用TRC加固后,加固梁與對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(雙層加固)可使結(jié)構(gòu)剛度顯著提高,同時極限承載能力提高24.4%,但對結(jié)構(gòu)的加固使得其延性有所降低;(4)對TRC加固T梁極限承載力進行理論計算,到達極限強度前將纖維束視為線彈性材料,計算結(jié)果與試驗值吻合較好。
[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.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U445.72

【參考文獻】

相關(guān)期刊論文 前10條

1 高丹盈;房棟;祝玉斌;;體外預應力FRP筋加固混凝土單向板抗裂及剛度計算方法[J];土木工程學報;2015年03期

2 田穩(wěn)苓;張芳源;趙曉艷;慕儒;;纖維編織網(wǎng)增強混凝土(TRC)研究進展[J];河北工業(yè)大學學報;2013年01期

3 周長東;李季;朱萬旭;楊帆;;纖維復合材料自鎖式錨具設計及力學性能研究[J];建筑結(jié)構(gòu)學報;2013年02期

4 王文煒;戴建國;張磊;;后張預應力碳纖維布加固鋼筋混凝土梁預應力損失試驗及計算方法研究[J];土木工程學報;2012年11期

5 彭暉;張建仁;何賢鋒;蔣鑫;;表層嵌貼預應力CFRP-strip加固鋼筋混凝土梁的受力性能研究[J];工程力學;2012年S1期

6 尹世平;徐世p，

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