本文選題：混凝土圓柱 + 預(yù)應(yīng)力碳纖維條帶　； 參考：《北京交通大學(xué)》2013年碩士論文

【摘要】：摘要：我國(guó)是地震災(zāi)害最嚴(yán)重的國(guó)家之一。為有效減少人員傷亡和經(jīng)濟(jì)損失,對(duì)現(xiàn)有安全性、可靠性不滿足規(guī)范要求的結(jié)構(gòu)進(jìn)行抗震加固顯得尤為重要。傳統(tǒng)碳纖維條帶(Carbon Fiber Reinforced Polymer,以下簡(jiǎn)寫為CFRP)加固混凝土圓柱技術(shù)存在應(yīng)力滯后問題,而預(yù)應(yīng)力CFRP加固混凝土圓柱能夠?qū)诵幕炷潦┘又鲃?dòng)約束,充分發(fā)揮CFRP材料的高強(qiáng)性能,避免CFRP的應(yīng)力滯后,從而得到更好的加固效果�；谖灰频目拐鹪O(shè)計(jì)方法能夠給結(jié)構(gòu)抗震設(shè)計(jì)、開展未來(lái)震害預(yù)測(cè)和現(xiàn)有結(jié)構(gòu)評(píng)估提供有效依據(jù),已被世界大多數(shù)國(guó)家所認(rèn)可。這一方法的核心就是建立結(jié)構(gòu)的損傷評(píng)估模型,定量計(jì)算結(jié)構(gòu)在地震過程中的損傷指標(biāo)。目前對(duì)基于位移抗震設(shè)計(jì)方法的研究主要集中于普通鋼筋混凝土結(jié)構(gòu),對(duì)預(yù)應(yīng)力CFRP加固后的結(jié)構(gòu)損傷模型鮮有人研究。本課題進(jìn)行了預(yù)應(yīng)力CFRP主動(dòng)約束混凝土圓柱的試驗(yàn)研究、主動(dòng)約束機(jī)理分析,建立了預(yù)應(yīng)力CFRP主動(dòng)約束情況下混凝土圓柱的損傷模型,以指導(dǎo)實(shí)際工程。具體內(nèi)容包括： (1)通過對(duì)預(yù)應(yīng)力CFRP加固混凝土圓柱在低周往復(fù)荷載作用下抗震性能試驗(yàn)研究,分析了在CFRP主動(dòng)約束下,混凝土圓柱的損傷破壞機(jī)理。 (2)基于前期低周往復(fù)荷載作用下CFRP加固鋼筋混凝土圓柱抗震性能試驗(yàn)的數(shù)據(jù),建立預(yù)應(yīng)力CFRP加固后鋼筋混凝土圓柱的損傷模型。 (3)參照我國(guó)規(guī)范及現(xiàn)有研究成果,確定預(yù)應(yīng)力CFRP加固鋼筋混凝土圓柱的5個(gè)抗震性能等級(jí)劃分標(biāo)準(zhǔn)。 (4)利用有限元軟件ABAQUS對(duì)預(yù)應(yīng)力CFRP加固混凝土圓柱在低周往復(fù)荷載作用及單調(diào)加載作用下分別進(jìn)行有限元模擬,將有限元模擬得到的荷載一位移曲線、骨架曲線與試驗(yàn)結(jié)果進(jìn)行比較,從而驗(yàn)證數(shù)值模型的合理性和可靠性。并使用有限元分析結(jié)果對(duì)本文所建立損傷模型及抗震性能等級(jí)劃分標(biāo)準(zhǔn)進(jìn)行驗(yàn)證,計(jì)算出的損傷指標(biāo)基本符合試驗(yàn)結(jié)果,證明了該損傷模型及等級(jí)劃分的合理性。
[Abstract]:Abstract: China is one of the countries with the most serious earthquake disaster. In order to effectively reduce casualties and economic losses, it is particularly important to strengthen structures which are safe and reliable, which do not meet the requirements of the code. Traditional carbon Fiber reinforced Polymer (CFRP) technique for strengthening concrete columns has the problem of stress hysteresis, and prestressed CFRP reinforced concrete columns can exert active restraint on the core concrete and give full play to the high strength properties of CFRP materials. The stress hysteresis of CFRP can be avoided and better reinforcement effect can be obtained. The displacement-based seismic design method can provide an effective basis for seismic design of structures, prediction of future earthquake damage and evaluation of existing structures, which has been recognized by most countries in the world. The core of this method is to establish the damage assessment model of the structure and to quantitatively calculate the damage index of the structure during the earthquake. At present, the research on displacement-based seismic design is mainly focused on ordinary reinforced concrete structures, and the damage model of prestressed CFRP reinforced concrete structures is rarely studied. In this paper, the experimental study of prestressed CFRP concrete columns with active confinement is carried out, and the mechanism of active confinement is analyzed. The damage model of prestressed CFRP concrete columns under active restraint is established to guide the practical engineering. The main contents are as follows: (1) the seismic behavior of concrete columns strengthened by prestressed CFRP under low cyclic load is studied, and the active restraint of CFRP is analyzed. Damage and failure mechanism of concrete columns. (2) based on the experimental data of seismic behavior of reinforced concrete columns strengthened with CFRP under low-cycle reciprocating loads, The damage model of reinforced concrete columns strengthened with prestressed CFRP is established. (3) referring to the code of our country and the existing research results, Five grades of seismic behavior of reinforced concrete columns strengthened by prestressed CFRP were determined. (4) the low cycle reciprocating load and monotonic loading of prestressed CFRP reinforced concrete columns were subjected to finite element software Abaqus. The finite element simulation is carried out under the finite element method. The load-displacement curve and skeleton curve obtained by finite element simulation are compared with the experimental results to verify the rationality and reliability of the numerical model. The results of finite element analysis are used to verify the damage model established in this paper and the classification standard of seismic performance. The calculated damage index is basically in line with the experimental results, which proves the rationality of the damage model and the classification of the grade.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU375.3

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