本文選題：CFRP + 加固��； 參考：《湘潭大學(xué)》2017年碩士論文

【摘要】：當(dāng)前許多建筑物由于受到材料老化、地震損傷等多方面因素影響,其功能已經(jīng)無法滿足使用要求。對(duì)已經(jīng)震損的鋼筋混凝土結(jié)構(gòu),將其全部推倒重建并不合理也不經(jīng)濟(jì),因此對(duì)其采用適當(dāng)?shù)募夹g(shù)手段進(jìn)行加固修復(fù)處理可解決這一問題。在地震中短柱所受的震損最為嚴(yán)重,本次試驗(yàn)主要針對(duì)震后短柱進(jìn)行研究,使用CFRP布對(duì)嚴(yán)重震損的短柱進(jìn)行加固,并通過試驗(yàn)探究其加固后的承載力恢復(fù)情況。本文主要開展了以下幾方面的工作:(1)通過查閱國(guó)內(nèi)外相關(guān)研究的文獻(xiàn),介紹了CFRP布加固柱的相關(guān)理論分析以及試驗(yàn)研究現(xiàn)狀,通過總結(jié)提出本文研究目的和意義。(2)設(shè)計(jì)制作了5個(gè)鋼筋混凝土短柱,采用位移控制加載方式對(duì)其進(jìn)行了擬靜力試驗(yàn),得到了5根短柱的震損現(xiàn)象及滯回曲線和骨架曲線。(3)對(duì)5個(gè)嚴(yán)重震損的鋼筋混凝土短柱加固,試驗(yàn)參數(shù)為軸壓比和CFRP布加固量。通過對(duì)修復(fù)后的短柱進(jìn)行低周往復(fù)加載,研究經(jīng)CFRP布加固后的鋼筋混凝土短柱的抗震性能。(4)將試驗(yàn)所得數(shù)據(jù)進(jìn)行處理并分析,繪出試件的水平荷載-位移滯回曲線、骨架曲線。分析不同參數(shù)情況下試驗(yàn)曲線的變化規(guī)律,并分析其延性、承載力、剛度等抗震性能。將修復(fù)前后的試驗(yàn)數(shù)據(jù)進(jìn)行對(duì)比分析,研究其抗剪承載力恢復(fù)情況。(5)本文采用《混凝土結(jié)構(gòu)加固設(shè)計(jì)規(guī)范》和《碳纖維片材加固混凝土結(jié)構(gòu)技術(shù)規(guī)程》兩規(guī)范中規(guī)定的計(jì)算公式,對(duì)加固后試件的承載力進(jìn)行計(jì)算,將計(jì)算結(jié)果與實(shí)驗(yàn)結(jié)果進(jìn)行比較分析。對(duì)本次試驗(yàn)數(shù)據(jù)進(jìn)行整理并分析,CFRP布可以提高試件的承載力、延性等抗震性能,但對(duì)于重度震損的鋼筋混凝土短柱僅通過CFRP布加固難以修復(fù)至其原有承載力。
[Abstract]:At present, many buildings have been affected by many factors, such as material aging, earthquake damage and so on. It is not reasonable or economical to push down and reconstruct reinforced concrete structures which have been damaged by earthquake. Therefore, it is possible to solve this problem by using appropriate technical means to reinforce and repair reinforced concrete structures. The short columns suffered the most serious earthquake damage in the earthquake. This test mainly focused on the short columns after the earthquake. CFRP cloth was used to strengthen the short columns with severe earthquake damage, and the recovery of the bearing capacity after the reinforcement was investigated through the test. The main work of this paper is as follows: (1) by referring to the relevant research literature at home and abroad, this paper introduces the relevant theoretical analysis and experimental research status of CFRP reinforced columns. Through summing up the purpose and significance of this paper. (2) five short reinforced concrete columns are designed and manufactured, and the quasi-static test is carried out by means of displacement-controlled loading. The seismic damage phenomenon, hysteretic curve and skeleton curve of five short columns are obtained. (3) the experimental parameters are axial compression ratio and CFRP reinforcement for five reinforced concrete short columns with severe earthquake damage. The seismic behavior of reinforced concrete short columns strengthened with CFRP sheets is studied by low-cycle reciprocating loading. (4) the horizontal load-displacement hysteretic curves and skeleton curves are drawn by processing and analyzing the experimental data. The variation law of test curve under different parameters is analyzed, and the seismic performance such as ductility, bearing capacity and stiffness are analyzed. Compare and analyze the test data before and after repair, (5) in this paper, the calculation formulas of concrete structural strengthening design code and CFRP reinforced concrete structure technical specification are used to calculate the bearing capacity of the strengthened specimens. The calculated results are compared with the experimental results. The data of this experiment can be sorted out and analyzed that CFRP cloth can improve the bearing capacity, ductility and seismic performance of the specimen, but it is difficult to repair the reinforced concrete short column with severe earthquake damage only by CFRP cloth reinforcement to its original bearing capacity.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU375.3;TU352.11

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