本文選題：基礎隔震 + 隔震墩�。� 參考：《湖南大學》2015年碩士論文

【摘要】：近年來,我國地震更加頻繁,帶來了巨大的人員傷亡和財產(chǎn)損失。在眾多的抗震方法中,基礎隔震因為其清晰的概念和有效的減震能力脫穎而出,成為了抗震領域的研究熱點�；A隔震的隔震效果主要是通過隔震層較小的水平剛度實現(xiàn)的,因此對隔震層水平剛度的研究,以及上部結構抗側剛度與隔震層水平剛度比對減震效果的影響研究顯得尤為重要。本文首先提出了剛度比的概念,即上部結構抗側剛度與隔震層水平剛度的比值,并簡單介紹了測定剛度比的兩種思路。然后以鋼筋瀝青隔震墩作為隔震層,鋼框架模型作為上部結構,進行了剛度比的測定試驗。在實驗室進行了兩層與三層的鋼框架模型振動臺試驗。通過增加鋼斜撐改變鋼框架抗側剛度,通過不同層數(shù)改變鋼框架高寬比,測得各種工況下的鋼框架抗側剛度與隔震層水平剛度比。對各種工況下的鋼框架模型進行振動臺激振試驗,研究不同剛度比情況下的鋼框架模型動力特征及減震效果,并與不同高寬比情況下的減震效果進行比較。通過鋼框架振動臺試驗數(shù)據(jù)分析,發(fā)現(xiàn)剛度比對減震效果的影響顯著。剛度比越大,隔震系數(shù)與頂層相對位移越小,減震效果越好。擬合了隔震系數(shù)均值與剛度比的關系,分析得到為了發(fā)揮隔震體系的減震效果,剛度比存在一個最小限定值。同時分析對比數(shù)據(jù),發(fā)現(xiàn)剛度比對減震效果的影響比高寬比更為顯著。
[Abstract]:In recent years, earthquakes in China have become more frequent, resulting in huge casualties and property losses.Among many seismic methods, foundation isolation has become a hot research area because of its clear concept and effective damping ability.The isolation effect of base isolation is mainly achieved by the small horizontal stiffness of the isolation layer, so the horizontal stiffness of the isolation layer is studied.It is particularly important to study the effect of lateral stiffness and horizontal stiffness ratio of isolation layer on the damping effect of superstructure.This paper first puts forward the concept of stiffness ratio, that is, the ratio of lateral stiffness of superstructure to horizontal stiffness of isolation layer, and briefly introduces two ideas for measuring stiffness ratio.Then, the stiffness ratio of steel frame model and reinforced asphalt isolation pier are measured by using the reinforced asphalt isolation pier as the isolation layer and the steel frame model as the superstructure.The shaking table tests of two and three layers of steel frame model were carried out in the laboratory.The lateral stiffness of the steel frame and the horizontal stiffness ratio of the isolation layer were measured by increasing the steel diagonal brace and changing the ratio of height to width of the steel frame with different stories.The dynamic characteristics and damping effect of steel frame model under different stiffness ratios were studied by shaking table excitation test under various working conditions, and the results were compared with those under different aspect ratio.Through the analysis of the test data of steel frame shaking table, it is found that the stiffness ratio has a significant effect on the damping effect.The greater the stiffness ratio, the smaller the isolation coefficient and the relative displacement of the top floor, and the better the damping effect.The relationship between the mean value of isolation coefficient and the ratio of stiffness is fitted. In order to give full play to the effect of the isolation system, the stiffness ratio has a minimum limit value.At the same time, it is found that the effect of stiffness ratio is more significant than that of aspect ratio.
【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】：TU352.12

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