本文選題：FRP板材　切入點：粘結(jié)　出處：《長沙理工大學》2013年碩士論文　論文類型：學位論文

【摘要】：FRP復合材料以及其在土木工程加固中的應用已經(jīng)成為了土木工程領(lǐng)域中最前沿的課題之一。由于FRP復合材料具有較高的強重比和剛重比、良好的耐久性、施工便捷等特點，從而使之成為了國內(nèi)外的研究人員和工程師們進行研究和分析的熱點問題�，F(xiàn)在研究者對外貼FRP加固不同類型混凝土結(jié)構(gòu)的粘結(jié)界面靜力性能展開了深入的研究，但是針對粘結(jié)界面的疲勞性能尚未進行深入而有效的研究，尤其是在基于不同敏感性參數(shù)條件下的粘結(jié)界面的疲勞退化規(guī)律和典型的失效破壞模式方面存在較大的分歧。本文建立在CFRP外貼加固素混凝土單面剪切構(gòu)件的基礎上，采用了簡單的素混凝土雙面剪切構(gòu)件作為試驗中外貼加固載體，同時選取了粘結(jié)長度和膠層厚度作為研究變量，進行了2個單調(diào)靜載試驗和5個疲勞試驗的研究，主要的研究工作如下： （1）通過分析沿板長方向上不同位置CFRP-混凝土粘結(jié)界面應變和自由端粘結(jié)界面滑移量在疲勞循環(huán)過程中的變化情況，討論了基于不同的粘結(jié)長度和膠層厚度條件下的粘結(jié)界面疲勞退化規(guī)律； （2）通過分析不同疲勞后靜載試驗以及單調(diào)準靜載試驗中沿板長方向上CFRP-混凝土粘結(jié)界面應變和自由端粘結(jié)界面滑移量在單調(diào)靜力加載過程中的變化情況，討論了基于不同的粘結(jié)長度和膠層厚度條件下的粘結(jié)界面疲勞后靜載性能以及典型的粘結(jié)界面失效破壞模式； （3）分別采用了簡化的粘結(jié)界面損傷力學模型、Cheng-Teng關(guān)于粘結(jié)強度的力學模型和ANSYS有限元模型，分析了基于不同粘結(jié)長度以及膠層厚度條件下的粘結(jié)界面靜力性能和疲勞損傷性能。
[Abstract]:FRP composite material and its application in civil engineering reinforcement have become one of the most advanced topics in civil engineering field. Because FRP composite material has the characteristics of high strength weight ratio and rigid weight ratio, good durability, convenient construction, etc. Therefore, it has become a hot issue for researchers and engineers at home and abroad to study and analyze. Now researchers have carried out in-depth research on the static behavior of bonding interface of different types of concrete structures strengthened with FRP. However, the fatigue behavior of bonding interface has not been studied deeply and effectively. Especially, there are great differences in the fatigue degradation law of bond interface and the typical failure failure mode based on the different sensitive parameters. This paper is based on the reinforcement of plain concrete single-side shear members with CFRP. A simple plain concrete double-sided shear member is used as the test carrier, and the adhesive length and the thickness of the adhesive layer are selected as the research variables, and two monotonic static load tests and five fatigue tests are carried out. The main research work is as follows:. 1) by analyzing the strain of CFRP- concrete bond interface and the slip of free end bond interface in different positions along the long direction of slab, the variation of CFRP- concrete interface slip at free end during fatigue cycle is analyzed. The fatigue degradation law of bond interface is discussed under the condition of different bonding length and thickness of adhesive layer. (2) the variation of CFRP- concrete bond interface strain and free end bond slip during monotonic static loading in different fatigue tests and monotonic quasi static load tests along the long direction of the slab is analyzed. The static load behavior of bond interface after fatigue and the typical failure mode of bond interface are discussed based on different bonding length and thickness of adhesive layer. In this paper, a simplified mechanical model of bond interface damage and a ANSYS finite element model on bond strength are used, respectively. The static and fatigue damage properties of bond interface are analyzed based on the different bond lengths and the thickness of the adhesive layer.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU37

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本文編號：1640537