發(fā)布時間：2018-10-18 09:13

【摘要】：隨著近幾年來我國地震頻發(fā)以及人們對房屋安全性的要求越來越高,鋼筋混凝土框架結(jié)構(gòu)梁柱節(jié)點的加固成為了一個必要的研究方向。國內(nèi)外學者對框架結(jié)構(gòu)節(jié)點加固后的受力及抗震性能進行了大量的試驗研究,但對不同方法加固效果進行對比的理論研究還較少。本文主要介紹了節(jié)點的受力機理和兩種目前常用的節(jié)點加固方法：粘貼鋼板加固法和粘貼碳纖維加固法。以成都某公司辦公樓邊節(jié)點為工程背景,根據(jù)有限元思想,采用有限元軟件MIDAS/FEA對兩種方法加固后節(jié)點的抗震性能進行對比,并且通過對節(jié)點抗剪承載力的驗算驗證了有限元分析的結(jié)果。研究發(fā)現(xiàn),兩種加固方法均能夠不同程度的優(yōu)化節(jié)點的抗震性能和提高節(jié)點的抗剪能力,粘貼鋼板加固法顯示出了更強的優(yōu)勢。本文重點研究了軸壓比、混凝土強度等級、鋼板厚度、碳纖維布置層數(shù)、不同碳纖維型號等關(guān)鍵因素對加固效果的影響程度。結(jié)果表明：軸壓比在一定限值的情況下能夠?qū)庸绦Ч鸬接欣饔?當超過一定值則會起到不利作用；存在一個最經(jīng)濟合理的混凝土等級,本文建議在C35～C45之間選用；鋼板厚度在2-6mm、碳纖維層數(shù)在2-3層之間選用對加固最為有效；在選擇加固方法和加固材料時,還應(yīng)進行經(jīng)濟性方面的考慮。本文的研究成果,對節(jié)點加固工程實踐能夠起到一定的參考作用。
[Abstract]:With the frequent occurrence of earthquakes in China and the increasing demand for building safety in recent years, the reinforcement of Liang Zhu joints of reinforced concrete frame structure has become a necessary research direction. Scholars at home and abroad have carried out a large number of experimental studies on the strength and seismic behavior of frame structure joints after reinforcement, but there are few theoretical studies on the comparison of the effects of different reinforcement methods. This paper mainly introduces the mechanical mechanism of the joint and two commonly used strengthening methods of the joint: the method of bonding steel plate and the method of strengthening with carbon fiber. Based on the idea of finite element method, the seismic behavior of the joints strengthened by the two methods is compared by using the finite element software MIDAS/FEA, taking the side joints of a company office building in Chengdu as the engineering background. The results of finite element analysis are verified by checking the shear capacity of joints. It is found that the two reinforcement methods can improve the seismic performance of joints and the shear resistance of joints to varying degrees. In this paper, the key factors such as axial compression ratio, strength grade of concrete, thickness of steel plate, number of layers of carbon fiber arrangement and different types of carbon fiber are studied. The results show that the axial compression ratio can play a beneficial role in the reinforcement effect under the condition of certain limit value, and when the axial compression ratio exceeds a certain value, there is a most economical and reasonable concrete grade, which is suggested to be selected between C35~C45. The thickness of steel plate is 2-6 mm and the number of carbon fiber layers is 2-3 layers. The research results of this paper can play a certain reference role in the practice of joint reinforcement engineering.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU375.4

【參考文獻】

相關(guān)期刊論文 前1條

1 張繼文,呂志濤,滕錦光,S.T.Smith;外部粘貼碳纖維或鋼板加固梁中粘結(jié)界面應(yīng)力分析[J];工業(yè)建筑;2001年06期

相關(guān)會議論文 前1條

1 王真龍;趙世春;;RC梁——SRC柱框架節(jié)點傳力機理分析[A];中國鋼協(xié)鋼-混凝土組合結(jié)構(gòu)分會第十一次年會論文集[C];2007年

相關(guān)碩士學位論文 前1條

1 魯效堯;CFRP與角鋼組合加固框架節(jié)點有限元分析[D];武漢理工大學;2013年

，

本文編號：2278672