【摘要】：隨著結(jié)構(gòu)健康監(jiān)測(SHM)領(lǐng)域的不斷發(fā)展,智能材料逐漸成為研究的熱點,尤其是對于承重材料自身感知性能方面的研究,越來越受到土木工程學(xué)者的青睞。在承載材料的智能特性研究方面,碳纖維材料表現(xiàn)出了卓越的承載-智能二重性:首先,在承載特性方面,碳纖維材料輕質(zhì)、高強,具有傳統(tǒng)鋼筋等材料所不具備的較強的耐腐蝕性和耐久性,其多變的材料形式(絲、筋材、板材、面材)也是其能獲得廣泛應(yīng)用的重要基礎(chǔ);其次,在智能特性方面,碳纖維材料具有類似應(yīng)變片一樣的力阻特性,即其自身的電阻值隨荷載具有較為明顯的變化,因此具備了成為集承載和監(jiān)測功能于一體的新型智能結(jié)構(gòu)材料。本文在國家自然科學(xué)基金“基于碳纖維材料的預(yù)應(yīng)力混凝土結(jié)構(gòu)自感知特性及其應(yīng)用研究(51478209)”的資助下,主要在課題組前期研究的基礎(chǔ)上,對基于碳纖維的CFRP材料的導(dǎo)電模型進行了優(yōu)化和數(shù)值擬合驗證,并針對CFRP傳感材料開發(fā)了與之匹配的電阻測試系統(tǒng),最后在實驗梁中測試了CFRP傳感器的實際工作可行性,具體的內(nèi)容為:1、針對本課題組之前提出的力阻模型,根據(jù)實際應(yīng)用條件,將其精簡,并根據(jù)荷載區(qū)間重新分配了模型的影響因素的權(quán)重比例,通過本課題組的實驗測試結(jié)果和文獻的數(shù)據(jù),驗證了簡化模型的可行性和正確性,為后續(xù)更精確測量提供了理論基礎(chǔ)。2、針對本課題組之前的研發(fā)、制備的CFRP傳感材料,和電子信息相關(guān)專業(yè)合作,開發(fā)了一套CFRP結(jié)構(gòu)狀態(tài)監(jiān)測系統(tǒng),該測試系統(tǒng)硬件層次是采用可編程邏輯CPLD,由Verilog語言編寫電路程序,軟件層次是采用C#語言基于Visual Studio窗體設(shè)計,編寫的數(shù)據(jù)處理和用戶界面,最后聯(lián)合調(diào)試完畢并應(yīng)用于實驗梁測試。3、在前期材料測試、測試系統(tǒng)開發(fā)基礎(chǔ)上,為了盡可能模擬承載和監(jiān)測雙重功能的實際工況,本文設(shè)計并完成了基于CFRP力阻效應(yīng)的結(jié)構(gòu)狀態(tài)監(jiān)測系統(tǒng)的梁加載實驗,實驗結(jié)果反映出在實際工程中,CFRP傳感材料在承受復(fù)雜荷載情況下,能夠通過其電阻值的變化反映出結(jié)構(gòu)上的荷載、損傷和應(yīng)變等變化情況。
[Abstract]:With the continuous development of structural health monitoring (SHM), intelligent materials have gradually become the focus of research, especially for the research on the perceptual performance of load-bearing materials, which is more and more favored by civil engineering scholars. In the research of intelligent characteristics of bearing materials, carbon fiber materials show excellent load-intelligent duality: first of all, in terms of bearing characteristics, carbon fiber materials are lightweight, high strength, have strong corrosion resistance and durability that traditional steel bars and other materials do not have, and its changeable material forms (wire, reinforcement, sheet, surface material) are also the important basis for its wide application; Secondly, in terms of intelligent characteristics, carbon fiber materials have the same force and resistance characteristics as strain gauges, that is, their own resistance values have obvious changes with load, so they have become a new type of intelligent structural materials which integrate bearing and monitoring functions. In this paper, supported by the National Natural Science Foundation of China, "Research on self-perception characteristics and Application of Prestressed concrete structures based on carbon Fiber Materials (51478209)", the conductive model of CFRP materials based on carbon fiber is optimized and verified by numerical fitting, and a matching resistance test system is developed for CFRP sensing materials. Finally, the feasibility of CFRP sensor is tested in the experimental beam. The specific contents are as follows: 1. According to the practical application conditions, the force resistance model proposed by our research group is simplified, and the weight ratio of the influencing factors of the model is reallocated according to the load interval. The feasibility and correctness of the simplified model are verified through the experimental test results of our research group and the data of the literature. It provides a theoretical basis for the subsequent more accurate measurement. 2, aiming at the previous research and development of our research group, the prepared CFRP sensing materials, and the professional cooperation of electronic information, a set of CFRP structural condition monitoring system is developed. The hardware level of the test system is to use programmable logic CPLD, to write circuit programs by Verilog language, and the software level is to use C # language based on Visual Studio forms to design, write data processing and user interface. Finally, the joint debugging is completed and applied to the experimental beam test. 3. On the basis of the preliminary material test and the development of the test system, in order to simulate the actual working conditions of bearing and monitoring dual functions as much as possible, this paper designs and completes the beam loading experiment of the structural condition monitoring system based on CFRP force resistance effect. The experimental results show that in the actual engineering, the CFRP sensing material is subjected to complex loads. The change of load, damage and strain can be reflected by the change of resistance value.
【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU317

【參考文獻】

相關(guān)期刊論文 前10條

1 劉東;劉泉;陳俊濤;;基于光纖光柵傳感的管路損傷測量與定位[J];華中科技大學(xué)學(xué)報(自然科學(xué)版);2015年05期

2 胡思晨;;光纖通信技術(shù)的應(yīng)用及發(fā)展分析[J];電子技術(shù)與軟件工程;2015年05期

3 張博明;孫新楊;李嘉;;電阻法在單絲碳纖維復(fù)合材料體系界面相傳載能力評價中的應(yīng)用[J];哈爾濱工程大學(xué)學(xué)報;2013年04期

4 朱四榮;鄭華升;李卓球;;樹脂基搭接碳纖維智能層的力阻特性[J];復(fù)合材料學(xué)報;2010年03期

5 劉軍;岳興蓮;何國國;羅石;吳碩開;;基于FPGA的數(shù)據(jù)采集系統(tǒng)的設(shè)計[J];微型機與應(yīng)用;2009年19期

6 何浩祥;閆維明;馬華;王卓;;結(jié)構(gòu)健康監(jiān)測系統(tǒng)設(shè)計標準化評述與展望[J];地震工程與工程振動;2008年04期

7 劉榮桂;李成績;龔向華;蔣峰;;碳纖維斜拉索的動力參數(shù)特性分析[J];哈爾濱工業(yè)大學(xué)學(xué)報;2008年08期

8 劉榮桂;李成績;蔣峰;龔向華;;碳纖維斜拉索的靜力參數(shù)特性分析[J];哈爾濱工業(yè)大學(xué)學(xué)報;2008年04期

9 李宏男;高東偉;伊廷華;;土木工程結(jié)構(gòu)健康監(jiān)測系統(tǒng)的研究狀況與進展[J];力學(xué)進展;2008年02期

10 鄭立霞;李卓球;宋顯輝;呂泳;;連續(xù)碳纖維單絲的應(yīng)變電阻效應(yīng)[J];功能材料;2008年03期

相關(guān)博士學(xué)位論文 前2條

1 季小勇;納米炭黑環(huán)氧樹脂基復(fù)合材料應(yīng)變和裂縫感知特性研究[D];哈爾濱工業(yè)大學(xué);2009年

2 張小玉;碳纖維智能層的特性及其場域監(jiān)測[D];武漢理工大學(xué);2007年

相關(guān)碩士學(xué)位論文 前2條

1 孔劉林;基于樹脂基碳纖維智能材料板結(jié)構(gòu)應(yīng)變監(jiān)測研究[D];武漢理工大學(xué);2013年

2 鄭立霞;機敏混凝土及其結(jié)構(gòu)的壓敏性研究[D];武漢理工大學(xué);2003年

，

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