本文選題：近斷層地震 + 水平-豎向相關性��； 參考：《武漢理工大學》2015年碩士論文

【摘要】：基礎隔震技術廣泛的應用于當今的建筑結構的隔震減震設計中;有效的減輕結構在地震作用下的反應和破壞,顯著提高了建筑結構的防震減災能力。它是工程結構被動控制的主要形式之一,在基礎隔震技術發(fā)展的幾十年間,提出了應用于各種隔震支座的力學模型。其中,最重要的是鉛芯橡膠支座的彈簧剛架力學模型。它可以模擬支座的幾何非線性和材料非線性兩種特征,是迄今為止較為成熟的力學模型。然而,隨著國內(nèi)外學者對于基礎隔震結構地震響應研究的深入,發(fā)現(xiàn)了一些問題有待進一步的探討研究。在此背景下,本文主要進行了以下幾方面的研究:(1)本文利用前人提出的彈簧鋼架模型,結合上部結構組成的多自由度運動體系,建立運動平衡方程;并且利用Newmark??法求解雙質(zhì)點多自由度動力學運動方程。(2)水平--豎向相關性是本文的另一個重點;通過控制鉛芯橡膠隔震支座的力學模型參數(shù)來控制水平--豎向相關性的影響水平。隔震結構分為四種工況來計算基礎隔震結構的地震響應,并作了相應的對比分析工作。研究結果表明:當在罕遇地震作用下,豎向相關性的影響更加明顯;尤其是在近斷層罕遇地震作用下尤為突出。(3)常規(guī)地震與近斷層地震動的特征明顯不同,這種不同之處必然會通過地震加速度反應時程曲線的加載來影響到隔震結構的地震響應;并對不同類型地震作用下的地震響應作了對比分析得出了一些重要的結論;數(shù)值分析結果表明:近斷層地震作用下隔震結構的豎向加速度與豎向位移響應將會明顯增大,并且考慮豎向相關性后還會明顯影響到水平位移和水平加速度的最大值。(4)本文中以八層剪切型結構為研究對象,通過MATLAB編程求得了原結構和隔震結構在各種工況作用下的地震反應。并且通過有限元分析軟件Sap2000進行驗證MATLAB程序計算結果的有效性。通過這些地震反應的分析可知這對于以后修訂建筑抗震設計規(guī)范將給出有益的建議與要求。
[Abstract]:The technology of foundation isolation is widely used in the design of isolation and damping of building structures, which can effectively reduce the response and damage of structures under earthquake, and improve the ability of earthquake prevention and mitigation of building structures. It is one of the main forms of passive control in engineering structures. In the decades of the development of foundation isolation technology, the mechanical models applied to various isolation bearings are put forward. Among them, the most important is the mechanical model of spring frame of lead rubber bearing. It can be used to simulate the geometric nonlinearity and material nonlinearity of the bearing, and it is a mature mechanical model up to now. However, with the in-depth study of seismic response of base-isolated structures, some problems need to be further studied. In this context, this paper mainly studies the following aspects: 1) this paper uses the spring steel frame model proposed by the predecessors, combined with the upper structure of the motion system of multiple degrees of freedom to establish the motion balance equation, and use the Newmark? It is another important point in this paper to solve the dynamic equation of motion of double particle with multiple degrees of freedom. The horizontal vertical correlation is controlled by controlling the mechanical model parameters of the lead-core rubber isolation bearing. The isolated structure is divided into four working conditions to calculate the seismic response of the base isolated structure, and the corresponding comparative analysis work is done. The results show that the effect of vertical correlation is more obvious under rare earthquakes, especially in the case of rare earthquakes on near faults. The characteristics of conventional earthquakes are obviously different from those of near-fault ground earthquakes. This difference is bound to affect the seismic response of isolated structures by loading the time-history curve of seismic acceleration response, and some important conclusions are obtained by comparing and analyzing the seismic responses of different types of earthquakes. The results of numerical analysis show that the vertical acceleration and vertical displacement responses of isolated structures will increase obviously under the action of near-fault ground earthquakes. Considering the vertical correlation, the maximum value of horizontal displacement and horizontal acceleration will be significantly affected.) in this paper, the eight-story shear structure is taken as the research object. The seismic responses of the original structure and the isolated structure under various working conditions are obtained by MATLAB programming. The validity of the calculation results of the MATLAB program is verified by the finite element analysis software Sap2000. Through the analysis of these seismic responses, it can be seen that this will provide useful suggestions and requirements for revising the seismic design code of buildings in the future.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU352.12

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