發(fā)布時間：2018-10-11 19:12

【摘要】：地震造成的結(jié)構(gòu)毀壞是因為地震引起地面運動進而使得建筑物受迫振動所致,采用基礎(chǔ)隔震技術(shù)便通過采用隔震系統(tǒng),使得結(jié)構(gòu)在基礎(chǔ)層與上部結(jié)構(gòu)之間發(fā)生有限的柔性滑動,進而減小結(jié)構(gòu)的水平剛度、延長結(jié)構(gòu)的自振周期、有效地降低結(jié)構(gòu)在地震作用中的加速度反應(yīng)。采用傳統(tǒng)的工程抗震設(shè)計方法有時不能適應(yīng)工程實際的需要,尤其是一些平面較為復(fù)雜和不規(guī)則的結(jié)構(gòu)。為此,各國的地震工程學(xué)家開展了隔震、減震的理論研究和工程實踐,并取得了迅速的發(fā)展。本論文主要進行了如下的幾項工作:(1)使用有限元軟件Midas Gen基于一平面較為復(fù)雜的實際工程,建立了傳統(tǒng)抗震和基礎(chǔ)隔震下兩種鋼筋混凝土框架結(jié)構(gòu)的模型;(2)對建立的模型進行模態(tài)分析和反應(yīng)譜分析;(3)選擇合適的地震波,對這兩種結(jié)構(gòu)進行動力作用下的時程分析;(4)根據(jù)上述幾種不同的分析方法,對比驗證這種平面相對復(fù)雜的結(jié)構(gòu)在基礎(chǔ)加了隔震支座之后的抗震性能。通過對該復(fù)雜平面框架結(jié)構(gòu)實例模型計算結(jié)果的分析與對比,來評判隔震結(jié)構(gòu)的減震、抗震性能。結(jié)果表明,在輸入地震動的記錄之后,基礎(chǔ)隔震結(jié)構(gòu)的加速度、層間位移及層間剪力值相比于非隔震傳統(tǒng)抗震結(jié)構(gòu)都有著明顯的減小,很好地削弱了該復(fù)雜結(jié)構(gòu)的水平地震作用,增強了結(jié)構(gòu)的整體抗震性能。最后,基于Midas Gen中的Pushover的方法,對兩種結(jié)構(gòu)進行靜力非線性分析,并且通過Pushover分析結(jié)果它們的譜關(guān)系曲線,進而找出結(jié)構(gòu)性能點,通過對性能點處的特征值分析,也再次驗證了基礎(chǔ)隔震結(jié)構(gòu)抗震性能的增強,為今后復(fù)雜結(jié)構(gòu)的隔震設(shè)計提供參考。
[Abstract]:The destruction of structure caused by earthquake is caused by ground motion caused by earthquake and forced vibration of buildings. By adopting the isolation system of foundation, the structure has a limited flexible sliding between the foundation layer and the superstructure. Furthermore, the horizontal stiffness of the structure is reduced, the natural vibration period of the structure is prolonged, and the acceleration response of the structure in earthquake is effectively reduced. The traditional engineering seismic design method can not meet the needs of engineering, especially some complex and irregular structures. For this reason, seismologists all over the world have carried out theoretical research and engineering practice of isolation and shock absorption, and have made rapid development. The main work of this thesis is as follows: (1) the finite element software Midas Gen is used to base on the complicated engineering of one plane. Two kinds of reinforced concrete frame structure models under traditional earthquake resistance and foundation isolation are established; (2) modal analysis and response spectrum analysis are carried out on the established model; (3) appropriate seismic waves are selected. The time history analysis of the two structures under dynamic action is carried out. (4) according to the above several different analysis methods, the seismic performance of this kind of plane relatively complex structure is verified after the isolation support is added to the foundation. Through the analysis and comparison of the calculation results of the example model of the complex plane frame structure, the seismic absorption and seismic performance of the isolated structure is evaluated. The results show that after recording the input ground motion, the acceleration, interstory displacement and interstory shear force of the base-isolated structure are obviously reduced compared with the non-isolated traditional seismic structure. The horizontal seismic action of the complex structure is weakened well, and the overall seismic performance of the structure is enhanced. Finally, based on the method of Pushover in Midas Gen, the static nonlinear analysis of two kinds of structures is carried out, and the spectral relation curves of the two structures are obtained by Pushover analysis, and then the performance points of the structures are found out, and the eigenvalues of the performance points are analyzed through the analysis of the eigenvalues of the two kinds of structures. It also verifies the enhancement of seismic performance of foundation isolated structure again, and provides reference for the design of complex structure in the future.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU352.1

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本文編號：2264946