本文選題：FRP網(wǎng)格 + 聚合物水泥砂漿��； 參考：《東南大學(xué)》2015年碩士論文

【摘要】：橋面板是直接承受車輛輪壓和各種腐蝕介質(zhì)侵蝕的構(gòu)件,隨著使用時(shí)間的增加極易發(fā)生材料的老化與結(jié)構(gòu)的損傷等問題,因此大量橋面板需要進(jìn)行承載力和耐久性加固。纖維復(fù)合材料(Fibre Reinforced Polymer,簡(jiǎn)稱FRP)是一種輕質(zhì)高強(qiáng)的高性能材料,聚合物砂漿粘貼FRP網(wǎng)格加固法相對(duì)于傳統(tǒng)粘鋼加固基本不增加結(jié)構(gòu)自重并且耐腐蝕,相對(duì)于纖維布加固更能提高構(gòu)件剛度并且不易出現(xiàn)剝離破壞,而且由于施工成本較低、加固性能優(yōu)異,顯示出良好的應(yīng)用前景。但FRP網(wǎng)格加固法因FRP網(wǎng)格的制備工藝未能實(shí)現(xiàn)標(biāo)準(zhǔn)化,同時(shí)加固工法未能完善,所以加固效果離散性大。另外,傳統(tǒng)加固材料碳纖維網(wǎng)格成本過高,而價(jià)格低廉的玻璃纖維網(wǎng)格存在蠕變大等問題,也約束了FRP網(wǎng)格的推廣應(yīng)用。因此,結(jié)合近年來重點(diǎn)研發(fā)的玄武巖纖維網(wǎng)格,對(duì)標(biāo)準(zhǔn)化網(wǎng)格制備,規(guī)范化網(wǎng)格增強(qiáng)進(jìn)行了系統(tǒng)研究。本文具體開展了以下幾個(gè)方面的工作：1、為解決FRP網(wǎng)格生產(chǎn)過程中出現(xiàn)的節(jié)點(diǎn)及尺寸控制等問題,本文在現(xiàn)有模壓成型生產(chǎn)工藝的基礎(chǔ)上進(jìn)行優(yōu)化,對(duì)纖維規(guī)格、樹脂種類和模具等進(jìn)行改進(jìn)并取得了較好的效果,成品FRP網(wǎng)格的抗拉強(qiáng)度和彈性模量相對(duì)于傳統(tǒng)產(chǎn)品得到大幅提升,滿足結(jié)構(gòu)使用要求。2、聚合物水泥砂漿的種類及其力學(xué)性能對(duì)加固效果影響較大,本文在分析水泥砂漿原材料的基礎(chǔ)上,通過系統(tǒng)試驗(yàn)選定聚合物水泥砂漿配合比,其抗壓、抗折強(qiáng)度及粘結(jié)性能相比普通水泥砂漿均得到較大提高。3、通過對(duì)FRP網(wǎng)格進(jìn)行雙剪試驗(yàn)研究其粘結(jié)性能。試驗(yàn)考察了FRP網(wǎng)格纖維材料(玄武巖纖維/玻璃纖維)、FRP網(wǎng)格厚度(1mm/3mm/5mm)、聚合物水泥砂漿種類(NBS丙乳砂漿/HPM-S鋼絲繩網(wǎng)片加固用聚合物砂漿)和界面處理方式(鑿毛和涂刷界面劑)等因素對(duì)粘結(jié)性能的影響,試驗(yàn)表明：相同厚度下采用BFRP網(wǎng)格加固的構(gòu)件粘結(jié)強(qiáng)度較大；相同材料的網(wǎng)格厚度越大,粘結(jié)性能越強(qiáng)；HPM-S砂漿加載過程中裂縫細(xì)而密,NBS丙乳砂漿裂縫少而寬,NBS砂漿加固構(gòu)件粘結(jié)強(qiáng)度較大；鑿毛處理和涂刷界面劑能夠有效提高粘結(jié)性能,防止發(fā)生界面粘結(jié)破壞。4、在以上研究的基礎(chǔ)上,本文通過5塊聚合物砂漿FRP網(wǎng)格加固板和1塊對(duì)比板的抗彎試驗(yàn),研究了纖維材料、網(wǎng)格厚度、網(wǎng)格層數(shù)、和加固砂漿種類對(duì)加固性能的影響。試驗(yàn)結(jié)果表明：加固后試驗(yàn)板的開裂荷載、極限荷載和剛度均得到了明顯提高,相同荷載下,裂縫寬度和撓度得到了有效控制。相同厚度下BFRP網(wǎng)格加固比GFRP網(wǎng)格加固的構(gòu)件極限承載能力高；相同纖維材料時(shí),網(wǎng)格厚度越大,加固效果越好；另外,砂漿涂抹厚度對(duì)加固板抗彎承載能力有一定的影響,NBS丙乳砂漿加固構(gòu)件的極限承載力略大于HPM-S砂漿加固構(gòu)件。5、對(duì)聚合物砂漿FRP網(wǎng)格加固橋面板的抗彎性能進(jìn)行理論分析,得出適用于加固構(gòu)件抗彎承載力和開裂荷載的計(jì)算方法,與試驗(yàn)實(shí)測(cè)結(jié)果相比較,誤差控制在15%以內(nèi),證明所用計(jì)算方法較為符合實(shí)際情況。
[Abstract]:The bridge deck is a component that directly bears the wheel pressure of the vehicle and the corrosion of various corrosive media. With the increasing use time, it is very easy to occur the aging of materials and the damage of the structure. Therefore, a large number of bridge panels need to be strengthened with bearing capacity and durability. Fiber composite material (Fibre Reinforced Polymer, short for short, FRP) is a kind of lightweight high strength high Performance materials, polymer mortar bonded FRP mesh reinforcement method has no weight and corrosion resistance to the traditional steel bonded reinforcement. Compared with the fiber cloth strengthening, it can improve the stiffness of the component and not be easily stripped, and it has a good application prospect because of low construction cost and good strengthening performance. But FRP grid is added. Due to the failure to standardize the preparation technology of the FRP grid, the reinforcement effect is not perfect, so the reinforcement effect is very discrete. In addition, the cost of the traditional reinforced carbon fiber grid is too high and the low price glass fiber grid has a large creep, which also restricts the popularization and application of the FRP grid. The basalt fiber grid has been studied systematically for standardized grid preparation and standardized grid enhancement. The following work has been carried out in this paper. 1, in order to solve the problems of node and size control in the process of FRP grid production, this paper optimizes the fiber gauge on the basis of the existing molding process. The type of resin, resin type and mould have been improved and achieved good results. The tensile strength and modulus of elasticity of the finished FRP mesh have been greatly improved compared with the traditional products, which meet the requirements of the structure use.2. The types and mechanical properties of the polymer cement mortar have a great effect on the reinforcement effect. This paper analyzes the base of the raw material of cement mortar. On the base of the system test, the mixture ratio of polymer cement mortar was selected. The compressive, flexural strength and bonding properties of the cement mortar were greatly improved by.3. The bonding performance of the FRP grid was studied by double shear test. The FRP mesh fiber material (basalt fiber / glass fiber) and FRP mesh thickness (1mm/3mm/5mm) were tested. ) the effect of polymer cement mortar (NBS acrylic mortar /HPM-S steel wire mesh reinforced polymer mortar) and interface treatment (chisel and brush interface agent) on bonding properties, the test shows that the bond strength of the members strengthened with the same thickness is larger, the greater the thickness of the same material, the bonding property of the same material. The stronger it can be, the cracks are fine and dense during the loading process of HPM-S mortar, the crack of NBS LC mortar is less and wider, and the bond strength of the NBS mortar reinforcement is larger, and the bonding properties of the chisel and the coating agent can be effectively improved and the interface bond is prevented from breaking the.4. On the basis of the above research, 5 blocks of polymer mortar with FRP grid reinforcement board are used in this paper. The effect of fiber material, mesh thickness, number of grid layers, and the types of reinforced mortar on the strengthening performance of 1 contrast plates are studied. The test results show that the cracking load of the reinforced test plate, the limit load and the stiffness are obviously improved, and the crack width and deflection are effectively controlled under the same load. The same thickness is the same thickness. The ultimate bearing capacity of the lower BFRP grid reinforcement is higher than that of the GFRP mesh. The greater the thickness of the mesh, the better the reinforcement effect. In addition, the thickness of the mortar coating has a certain effect on the flexural capacity of the reinforced plate. The ultimate bearing capacity of the NBS propyl mortar reinforced component is slightly greater than that of the HPM-S mortar reinforced component.5. The flexural performance of the reinforced concrete gridding FRP gridding plate is theoretically analyzed, and the calculation method suitable for the flexural capacity and cracking load of the reinforced component is obtained. Compared with the experimental results, the error is less than 15%, which proves that the calculation method is more in line with the actual situation.

【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U443.31;U445.72

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