本文關(guān)鍵詞： FRP 橋墩 抗震性能 Opensees　出處：《大連理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：我國(guó)是一個(gè)地震頻發(fā)的國(guó)家,橋梁作為生命線工程的重要組成部分,加強(qiáng)其抗震能力對(duì)地震后續(xù)的生命救援、物資的運(yùn)輸?shù)汝P(guān)乎生命的行動(dòng)的展開(kāi)是極其必要。橋墩是橋梁的主要抗側(cè)力構(gòu)件,在地震作用下,水平地震力主要作用在橋墩的上部,并通過(guò)橋墩向下傳遞,而且橋墩是支撐著橋體的主要構(gòu)件,同時(shí)也承擔(dān)者軸向的荷載作用,所以橋墩極其關(guān)鍵。要想橋梁在地震中屹立不倒,首先要增強(qiáng)橋墩的抗震性能。對(duì)纖維增強(qiáng)復(fù)合材料(Fiber Reinforced Plastics, FRP)的研究發(fā)現(xiàn),將其應(yīng)用于鋼筋混凝土結(jié)構(gòu)的加固會(huì)對(duì)結(jié)構(gòu)的抗震性能有很大的提高。加之具備輕質(zhì)、高強(qiáng)、耐腐蝕的特性,因此應(yīng)用FRP來(lái)提高橋墩的抗震性能是個(gè)不錯(cuò)的選擇。而Opensees軟件作為開(kāi)放的地震工程模擬實(shí)驗(yàn)室,在模擬地震作用下的結(jié)構(gòu)響應(yīng)分析方面有著很強(qiáng)大的功能,有著豐富的材料模型庫(kù)和很好的非線性數(shù)值模擬精度。因此本文應(yīng)用Opensees來(lái)進(jìn)行FRP約束鋼筋混凝土橋墩抗震性能的分析。主要的研究?jī)?nèi)容如下：(1)對(duì)國(guó)內(nèi)外FRP約束混凝土的本構(gòu)關(guān)系的研究現(xiàn)狀分析總結(jié),選擇適合本文模擬分析情況的本構(gòu)模型。(2)應(yīng)用Opensees對(duì)FRP不同包裹方式的橋墩施加低周往復(fù)荷載做滯回性能分析,對(duì)各滯回曲線對(duì)比研究,分析確定不同的包裹部位對(duì)橋墩滯回性能的影響；研究FRP不同包裹層數(shù)的滯回性能,以此研究FRP厚度與橋墩抗震性能之間的關(guān)系。(3)應(yīng)用Pushover方法對(duì)不同包裹厚度的橋墩做靜力彈塑性分析,來(lái)評(píng)價(jià)結(jié)構(gòu)的抗震性能,進(jìn)一步研究FRP厚度對(duì)橋墩抗震性能的影響,輸入地震波對(duì)橋墩進(jìn)行了動(dòng)力時(shí)程分析,評(píng)價(jià)不同的約束方案對(duì)橋墩的位移時(shí)程的影響。
[Abstract]:Our country is a country with frequent earthquakes. As an important part of lifeline engineering, bridges strengthen their seismic capacity to save the lives of subsequent earthquakes. It is extremely necessary to carry out life-related actions such as transportation of materials. Piers are the main lateral force components of the bridge. Under earthquake, horizontal seismic forces mainly act on the upper part of the pier and are transmitted down through the pier. And the piers are the main components that support the bridge, and they are also subjected to axial loads, so the piers are extremely critical. If the bridge is to stand up in an earthquake, The research on fiber reinforced composite fiber Reinforced plastics (FRP) shows that the application of FRP to reinforced concrete structure will greatly improve the seismic performance of the structure, in addition, it has the advantages of light weight and high strength. Therefore, it is a good choice to use FRP to improve the seismic performance of bridge piers. As an open laboratory of earthquake engineering simulation, Opensees software has a very powerful function in structural response analysis under simulated earthquake. It has abundant material model base and good nonlinear numerical simulation precision. Therefore, this paper uses Opensees to analyze the seismic behavior of reinforced concrete pier confined by FRP. The main research contents are as follows: 1) mixing FRP constraint at home and abroad. Analysis and Summary of the Constitutive relationship of Condensed soil, Choosing the constitutive model suitable for the simulation and analysis of this paper. (2) using Opensees to analyze the hysteretic behavior of the pier with different wrapping modes of FRP under low cycle reciprocating load, and comparing the hysteretic curves. The effects of different wrapping positions on the hysteretic performance of bridge piers are analyzed, and the hysteretic properties of FRP with different number of wrapping layers are studied. The relationship between the thickness of FRP and the seismic behavior of pier is studied. The Pushover method is used to analyze the static elastoplastic behavior of the pier with different thickness to evaluate the seismic performance of the structure, and to further study the influence of the thickness of FRP on the seismic performance of the pier. The dynamic time history analysis of the pier is carried out by input seismic wave, and the influence of different constraint schemes on the displacement time history of the pier is evaluated.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U442.55

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本文編號(hào)：1508323