本文選題：FRP + GFRP套管�。� 參考：《湖南大學》2015年碩士論文

【摘要】：近年來,纖維增強復合材料(Fiber Reinforced Plastics/Polymers,簡稱FRP),因其高比強度、良好的耐腐蝕性等優(yōu)勢成為土木工程界炙手可熱的新型材料,因其施工便捷,近年來被廣泛應用于城市基礎設施以及橋梁等結(jié)構(gòu)的修補、加固,并寄望應用于結(jié)構(gòu)抗震及結(jié)構(gòu)抗爆、抗沖擊領(lǐng)域,然而,FRP約束混凝土在爆炸及沖擊荷載作用下的性能研究目前還處在初級階段,面對頻頻發(fā)生的因爆炸、沖擊致使結(jié)構(gòu)失效的事件,針對FRP約束混凝土抗沖擊性能的研究變得十分必要。FRP是一種線彈性材料,破壞呈脆性,這對于結(jié)構(gòu)抗震及抗沖擊都十分不利,玻璃纖維管-螺旋箍筋復合約束混凝土是一種復合結(jié)構(gòu),由螺旋箍筋(Steel Spiral reinforcement,簡稱SR)約束混凝土及其外部玻璃纖維(Glass Fiber Reinforced Plastics/Polymers,簡稱GFRP)管組成,這是一種很有發(fā)展前景的復合材料,其優(yōu)點包括:可在提高GFRP套管結(jié)構(gòu)塑性性能的同時提高SR的抗腐蝕能力,預制的GFRP套管既可為核心混凝土提供約束也可作為澆筑混凝土的模板,同時也保護內(nèi)部結(jié)構(gòu)不受到外部惡劣環(huán)境影響。本文在前人所做關(guān)于FRP-橫向鋼筋復合約束混凝土在靜載、沖擊荷載作用下的力學性能研究及FRP約束混凝土、鋼筋混凝土基本力學性能基礎上,采用壓力機和湖南大學高性能落錘試驗機分別對GFRP-螺旋箍筋復合約束混凝土的靜載和沖擊力學性能做了試驗研究,同時采用理論計算對試驗進行了模擬分析。本文主要研究工作包括以下幾部分:(1)GFRP-螺旋箍筋復合約束混凝土在靜力作用下的試驗研究。利用10,000KN剛性壓力試驗機對12個不同GFRP層數(shù)、不同螺旋箍筋體積配筋率的GFRP-螺旋箍筋復合約束混凝土圓柱試件進行軸壓試驗,得到其在軸向靜力作用下的應力-應變曲線,探究三種材料的協(xié)同工作特點,分析試驗變量對復合約束混凝土受力性能的影響。(2)提出GFRP-螺旋箍筋復合約束混凝土在軸向靜載作用下的應力-應變模型,并將模擬結(jié)果與試驗結(jié)果進行對比,分析模型的適用性及試驗不足之處�；�18個混凝土強度為C30的GFRP-螺旋箍筋復合約束混凝土試件靜載試驗結(jié)果,提出其應力-應變理論模型,并將模型模擬結(jié)果與12個混凝土強度為C40的GFRP-螺旋箍筋復合約束混凝土試件靜載試驗結(jié)果進行對比,分析模型的適用性,同時討論試驗的不足之處。(3)GFRP-螺旋箍筋復合約束混凝土在沖擊荷載作用下的試驗研究。采用落錘試驗機對24個GFRP-螺旋箍筋復合約束混凝土圓柱試件進行軸向沖擊荷載試驗,得到其沖擊應力時程曲線及應變時程曲線,探究三種材料的協(xié)同工作特點,探究試驗變量對其沖擊受力性能的影響。(4)GFRP-螺旋箍筋復合約束混凝土在沖擊荷載作用下的理論分析。將沖擊試驗結(jié)果與靜載試驗結(jié)果進行對比,得出強度增大系數(shù),收集整理同類試驗結(jié)果,探討沖擊能量及約束比對增大系數(shù)的影響,同時采用理論強度模型模型試驗結(jié)果并與試驗結(jié)果進行對比,分析模型的試用性及試驗的不足之處。
[Abstract]:In recent years, fiber reinforced composites (Fiber Reinforced Plastics/Polymers, referred to as FRP), because of its high strength, good resistance to corrosion and other advantages to become the new hot material in the field of civil engineering, because of its convenient construction, has been widely used in city infrastructure and bridge repair, reinforcement, and applied to hope the seismic structure and anti explosion, impact, however, the performance study on the action of the explosion and impact loading of FRP confined concrete is still in the initial stage, in the face of the frequent occurrence of explosion shock, resulting in structural failure events, to study the impact resistance performance of concrete confined by FRP is necessary for.FRP is a linear elastic the material, brittle failure, the structural seismic and shock resistance are very negative, glass fiber tube concrete composite spiral hoop constraint is a kind of composite structure, a spiral The stirrup (Steel Spiral reinforcement, referred to as SR) confined concrete and external glass fiber (Glass Fiber Reinforced Plastics/Polymers, referred to as GFRP) tube, which is a kind of composite material with good prospect of development, its advantages include: can improve the plastic properties of GFRP casing structure and improve the corrosion resistance of SR, GFRP prefabricated casing not only is the core concrete to provide constraints can also be used as a concrete template, but also protect the internal structure from the external adverse environmental impact. Based on the previous work on FRP- transverse reinforcement composite confined concrete under static load, the performance of FRP and mechanical constraints of concrete under impact loading, the basic mechanical properties of reinforced concrete the press, and the Hunan University high performance drop testing machine of concrete composite spiral hoop constraint GFRP- static load and impact mechanical properties The experimental study and calculation were simulated and analyzed by using test theory. The main research work includes the following parts: (1) experimental study under static loads GFRP- compound spiral stirrups confined concrete. On 12 different layers of GFRP using 10000KN rigid pressure testing machine, different volume of spiral hoop reinforcement ratio GFRP- compound spiral stirrups confined concrete cylinder specimens were tested under axial compression, the axial static stress strain curve, collaborative work to explore the characteristic of three kinds of materials, test and analysis of influence of variable composite confined concrete stress performance. (2) proposed the concrete composite spiral hoop in the axial static constraint GFRP- load stress strain model under the action, and the simulation results were compared with the test results, the applicability and shortcomings of the model is analyzed. The test of 18 concrete strength based on C30 GFRP-. The concrete composite specimen rotation constraint stirrup loading test, the stress-strain model and the specimens of static load test results were compared with the simulation results of 12 concrete strength of C40 GFRP- composite spiral stirrup confined concrete, the applicability of the analysis model, and discuss the shortcomings (3 trials.) experimental study under impact load GFRP- spiral stirrup confined concrete composite. The drop testing machine of 24 GFRP- spiral stirrup confined concrete composite cylindrical specimens under axial impact load test, the impact stress time curves and strain time curve, collaborative work to explore the characteristic of three kinds of materials, to explore the impact of performance the test variable force on the impact. (4) theoretical analysis of GFRP- spiral stirrup confined concrete composite under impact load. The results will impact tests and static load test results By comparing the strength increasing coefficient, we collect and sort out the same kind of test results, and discuss the impact of impact energy and restraint ratio on the enlarging coefficient. Meanwhile, the theoretical strength model test results are compared with the experimental results, and the feasibility and the shortcomings of the test are analyzed.

【學位授予單位】：湖南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU398.9

【參考文獻】

相關(guān)期刊論文 前9條

1 蔡紹懷;我國鋼管混凝土結(jié)構(gòu)技術(shù)的最新進展[J];土木工程學報;1999年04期

2 蔡紹懷,焦占拴;鋼管混凝土短柱的基本性能和強度計算[J];建筑結(jié)構(gòu)學報;1984年06期

3 韓林海,陶忠;方鋼管混凝土軸壓力學性能的理論分析與試驗研究[J];土木工程學報;2001年02期

4 韓林海,楊有福;矩形鋼管混凝土軸心受壓構(gòu)件強度承載力的試驗研究[J];土木工程學報;2001年04期

5 韓林海;圓鋼管混凝土柱耐火極限的理論計算結(jié)果及其工程實踐[J];消防科學與技術(shù);2000年01期

6 王宏偉;徐國林;鐘善桐;;空心率對空心鋼管混凝土軸壓短柱工作性能及承載力影響的研究[J];工程力學;2007年10期

7 張常光;趙均海;馮紅波;;CFRP-鋼管混凝土軸壓短柱的力學性能[J];建筑結(jié)構(gòu);2008年03期

8 王慶利;車媛;譚鵬宇;邵永波;;CFRP-鋼管混凝土結(jié)構(gòu)研究的進展與展望[J];工程力學;2010年S2期

9 李杉;盧亦焱;李娜;黃銀q，

本文編號：1731464