内嵌碳纤维板加固混凝土梁抗弯性能试验研究

发布时间：2018-08-19 09:36

【摘要】：随着纤维增强材料（FRP）广泛应用于结构加固工程，利用FRP材料对结构物进行补强加固的方法主要有外贴法和嵌入法两种，嵌入法是国外学者近年来才提出的一项新技术，其在构件需要加固的部位的表面开槽，，将FRP筋或板条嵌入其中，利用粘结材料使FRP与构件紧密结合，达到加固补强的目的，是一种工程应用前景广阔的加固方法。本文通过对9根不同加固情况钢筋混凝土试验梁的静力受弯试验（其中1根为对比梁，1根为外贴碳纤维板条加固梁，7根为内嵌式碳纤维板加固梁），并且从内嵌CFRP板条的开槽数量、粘结材料、嵌入长度和开槽尺寸等不同加固情况对加固梁做出较系统的试验研究。主要内容如下： 1.对试验过程和现象进行详细的描述，得到加固梁荷载-应变曲线、荷载-挠度关系曲线、荷载-裂缝宽度曲线等；进而分析各加固梁的极限承载力、破坏形态、刚度、裂缝宽度、延性等方面。 2.对比分析外贴式及内嵌式两种加固方法，并以粘结材料（环氧树脂、环氧砂浆、水泥砂浆）、开槽尺寸(10mm×25mm、15mm×25mm)、开槽数量（2、3）、CFRP板条嵌入长度（1800mm、1500mm、1200mm）为不同加固情况下对内嵌CFRP板条与混凝土粘结性能影响进行分析研究；得出些结果，以便指导工程实践。 3.在试验结果的基础上，采用ABAQUS有限元软件对试验梁进行数值模拟计算，与试验结果对比分析研究。
[Abstract]:With the wide application of fiber reinforced material (FRP) in structural strengthening engineering, there are two main methods of reinforcing and strengthening structures using FRP materials. The embedding method is a new technology proposed by foreign scholars in recent years. It is a kind of reinforcement method with broad prospect of engineering application, which is slotted on the surface of the area where the member needs to be strengthened, and embedded in the FRP bar or slab. The FRP is tightly combined with the member by means of bonding material, and the purpose of strengthening and strengthening is achieved. In this paper, the static bending tests of 9 reinforced concrete test beams with different reinforcement conditions are carried out (one of them is a contrast beam, one is a contrasting beam, one is a reinforced beam with externally affixed carbon fiber sheet and seven are reinforced by embedded carbon fiber slab), and CFRP is embedded in the beam. Slotted number of slabs, Different reinforcement conditions, such as bonding material, embedding length and slot size, are systematically studied. The main contents are as follows: 1. The test process and phenomena are described in detail, and the load-strain curve, load-deflection curve, load-crack width curve and so on are obtained, and the ultimate bearing capacity, failure form and stiffness of each strengthened beam are analyzed. Crack width, ductility, etc. 2. Comparison and analysis of external and embedded reinforcement methods, and bonding materials (epoxy resin, epoxy mortar, epoxy mortar, Cement mortar, slotted size (10mm 脳 25mm / 15mm 脳 25mm) and slotted number (2m3) / CFRP-embedded length (1800mm / 1500mm / 1200mm) are analyzed and studied under different reinforcement conditions to study the effect of inlay CFRP slab on the bond properties of concrete. The results are obtained in order to guide engineering practice. 3. On the basis of the experimental results, the ABAQUS finite element software is used to simulate the test beam, and the results are compared with the experimental results.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU375.1

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