本文關鍵詞： FRP 橋墩 抗震性能 Opensees　出處：《大連理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：我國是一個地震頻發(fā)的國家,橋梁作為生命線工程的重要組成部分,加強其抗震能力對地震后續(xù)的生命救援、物資的運輸?shù)汝P乎生命的行動的展開是極其必要。橋墩是橋梁的主要抗側力構件,在地震作用下,水平地震力主要作用在橋墩的上部,并通過橋墩向下傳遞,而且橋墩是支撐著橋體的主要構件,同時也承擔者軸向的荷載作用,所以橋墩極其關鍵。要想橋梁在地震中屹立不倒,首先要增強橋墩的抗震性能。對纖維增強復合材料(Fiber Reinforced Plastics, FRP)的研究發(fā)現(xiàn),將其應用于鋼筋混凝土結構的加固會對結構的抗震性能有很大的提高。加之具備輕質、高強、耐腐蝕的特性,因此應用FRP來提高橋墩的抗震性能是個不錯的選擇。而Opensees軟件作為開放的地震工程模擬實驗室,在模擬地震作用下的結構響應分析方面有著很強大的功能,有著豐富的材料模型庫和很好的非線性數(shù)值模擬精度。因此本文應用Opensees來進行FRP約束鋼筋混凝土橋墩抗震性能的分析。主要的研究內容如下：(1)對國內外FRP約束混凝土的本構關系的研究現(xiàn)狀分析總結,選擇適合本文模擬分析情況的本構模型。(2)應用Opensees對FRP不同包裹方式的橋墩施加低周往復荷載做滯回性能分析,對各滯回曲線對比研究,分析確定不同的包裹部位對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系。(3)應用Pushover方法對不同包裹厚度的橋墩做靜力彈塑性分析,來評價結構的抗震性能,進一步研究FRP厚度對橋墩抗震性能的影響,輸入地震波對橋墩進行了動力時程分析,評價不同的約束方案對橋墩的位移時程的影響。
[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.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U442.55

【參考文獻】

相關期刊論文 前1條

1 高劍飛;;OpenSees:一個專用于土木工程的分析軟件[J];四川水利;2007年05期

相關博士學位論文 前1條

1 涂文戈;建筑結構靜力彈塑性分析方法及其減震控制[D];湖南大學;2003年

相關碩士學位論文 前1條

1 龔河濱;CFRP布加固非延性鋼筋混凝土橋墩抗震性能分析[D];西南交通大學;2014年

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