本文選題：FRP　切入點：剝離破壞　出處：《廣東工業(yè)大學(xué)》2014年碩士論文

【摘要】：纖維增強復(fù)合材料(Fiber Reinforced Polymer,簡稱FRP)因其輕質(zhì)、高強等優(yōu)點,已經(jīng)被廣泛應(yīng)用于混凝土及其他結(jié)構(gòu)的加固中。但是外貼FRP加固混凝土構(gòu)件容易發(fā)生早期剝離破壞,導(dǎo)致FRP加固效果降低。相關(guān)研究和設(shè)計規(guī)范建議對外貼FRP片材采用端部錨固系統(tǒng),從而減緩甚至防止剝離破壞的發(fā)生,提高FRP片材的利用率,充分其高強的特點,最終提高加固效果。本文采用一種由FRP纏繞而成的纖維錨具,應(yīng)用于混凝土梁的抗剪加固試驗研究。本文的研究內(nèi)容主要包括以下兩個部分： (1)設(shè)計并澆筑了18根小型試驗梁,通過小梁試驗,專門研究纖維錨具對外貼FRP與混凝土粘結(jié)性能的影響。本文系統(tǒng)研究了纖維錨具樣式、錨具布置位置、錨具尺寸、錨具數(shù)量以及FRP片材寬度對FRP與混凝土粘結(jié)性能的影響。試驗結(jié)果表明,通過合理得布置纖維錨具,可以防止FRP的發(fā)生早期剝離破壞,明顯提高FRP片材的應(yīng)變以及試驗梁的承載力和延性。 (2)基于上述的小梁試驗結(jié)果,選擇一種優(yōu)化的纖維錨固措施,用于T型鋼筋混凝土梁的受剪加固中,并將之與只外貼FRP U形筋抗剪加固效果進行對比。為了研究抗剪加固梁中帶纖維錨具FRP(或外貼FRP)、混凝土以及箍筋三者之間的抗剪相互作用,本文設(shè)計了6根跨長為3400mm的足尺T型梁,試驗梁分為兩組,其中一組試驗端不配置箍筋,另一組試驗梁配置箍筋；每組試驗梁包括一根控制梁,一根U型外貼FRP的加固梁,一根端部布置纖維錨具的外貼FRP加固梁。試驗結(jié)果表明,纖維錨具可以有效提高試驗梁的抗剪承載力和延性,且在有箍筋試驗梁中提高作用更為明顯。
[Abstract]:Fiber Reinforced Polymer (FRP) has been widely used in the reinforcement of concrete and other structures because of its advantages of light weight and high strength. It is suggested that the end Anchorage system should be used in the application of the FRP sheet, which can slow down or even prevent the breakage, improve the utilization ratio of the FRP sheet, and make full use of the high strength of the FRP sheet. Finally, the reinforcement effect is improved. In this paper, a fiber Anchorage made of FRP is used to study the shear strength of concrete beams. The main contents of this paper include the following two parts:. In this paper, 18 small test beams are designed and poured, and the influence of fiber anchors on the bond between FRP and concrete is studied by trabecular test. This paper systematically studies the type of fiber anchors, the location of anchors, the size of anchors. The effect of the number of anchors and the width of FRP sheet on the bond properties between FRP and concrete. The experimental results show that the early peeling failure of FRP can be prevented by reasonably arranging fiber anchors. The strain of FRP sheet and the bearing capacity and ductility of test beam are improved obviously. 2) based on the above experimental results of trabeculae, an optimized fiber Anchorage method is selected for the shear reinforcement of T-type reinforced concrete beams. In order to study the shearing interaction between fiber Anchorage (or externally affixed FRP, concrete and stirrups) in shear strengthened beams, In this paper, six full-scale T-beams with 3400mm span are designed. The test beams are divided into two groups, one group is not equipped with stirrups at the test end and the other group is equipped with stirrups, each group of test beams includes a control beam and a U-shaped external FRP reinforced beam. The experimental results show that the fiber Anchorage can effectively improve the shear capacity and ductility of the test beam, and the effect is more obvious in the test beam with stirrups.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU375.1

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本文編號：1662921