本文選題：框架結構 + L形平面�。� 參考：《安徽建筑大學》2013年碩士論文

【摘要】：改革開放以來我國經(jīng)濟得到了長足發(fā)展，各種體型復雜、不規(guī)則的建筑逐漸成為人們的追求。但是從結構角度講，建筑結構越是平面、立面形狀復雜、體型豐富，，就越易產(chǎn)生震害，易造成重大的人員傷亡和經(jīng)濟損失，其抗震分析和設計一直受到各國學者高度重視和廣泛研究。因此，對體型復雜、不規(guī)則的建筑結構進行抗震性能的研究有著重要的理論價值和實際意義。 本文選取一重點設防類的平面L型幼兒園框架結構為研究對象，確定合理的計算模型，以有限元為主要研究手段進行抗震性能化設計的研究。本文主要研究工作如下： （1）運用SAP2000結構分析軟件，進行多遇地震下的振型分解反應譜分析； （2）運用SAP2000結構分析軟件，選取三條地震波，進行地震作用下的彈性時程分析，對比、分析了該結構在彈性階段的反應譜分析和動力時程分析結果。結果表明：該結構滿足“小震不壞”的抗震性能指標，所選三條地震波滿足《建筑抗震設計規(guī)范》的選波要求； （3）運用SAP2000結構分析軟件，選擇合理的計算模型，對結構進行非線性動力分析，分析結構在三條地震波作用下的動力特性及地震時的受力變形情況，并與彈性時程分析的結果進行對比。結果表明：罕遇地震下，結構的最大層間位移角小于規(guī)范彈塑性層間位移角限值1/50，結構整體性能滿足“大震不倒”的設防水準；構件損傷情況表明梁出鉸較多，框架柱僅底層柱腳屈服，邊榀框架破壞相對嚴重，扭轉邊榀效應較明顯，這與結構扭轉效應相一致；結構構件滿足“強柱弱梁”的屈服機制，整體破壞符合框架預期損傷機制； （4）結構平面凹凸不規(guī)則，采用SAP2000對多遇地震及罕遇地震下各層樓板應力進行分析，應力云圖可直觀地觀察到結構樓面的相對薄弱部位； （5）考慮工程應用，按中國地震局文件規(guī)定復核，并進行抗震加強措施研究。 綜上分析結果表明：在地震作用下，該平面L型建筑結構雖然形體不規(guī)則，但通過合理的結構布置和一些抗震加強措施，可使結構具備一定的承載與變形能力，使達到“小震彈性”、“大震不倒”的抗震設防目標及抗震性能指標。通過在罕遇地震下的彈塑性計算分析，找到結構的潛在抗震薄弱部位，提出了相應的結構抗震加強措施，為工程設計提供參考。
[Abstract]:Since the reform and opening up, China's economy has been greatly developed, various complex, irregular buildings have gradually become the pursuit of people. But from a structural point of view, the more plane the building structure, the more complex the facade and the richer the shape, the more likely it is to cause earthquake damage and cause heavy casualties and economic losses. Its seismic analysis and design has been highly valued and widely studied by scholars all over the world. Therefore, it is of great theoretical and practical significance to study the seismic behavior of complex and irregular building structures. In this paper, a plane L-type kindergarten frame structure is chosen as the research object, a reasonable calculation model is determined, and the seismic performance-based design is studied by means of finite element method. The main work of this paper is as follows: (1) using SAP2000 structure analysis software to analyze the mode decomposition response spectrum under frequent earthquakes; (2) selecting three seismic waves by using SAP2000 structure analysis software. The results of response spectrum analysis and dynamic time history analysis of the structure in the elastic stage are analyzed by comparing the elastic time history analysis of the structure under seismic action. The results show that the structure meets the seismic performance index of "small earthquake is not bad", and three seismic waves are selected to meet the requirements of seismic design code for buildings. (3) using SAP2000 structural analysis software, selecting a reasonable calculation model, The nonlinear dynamic analysis of the structure is carried out. The dynamic characteristics of the structure under the action of three seismic waves and the stress and deformation of the structure during the earthquake are analyzed, and the results are compared with the results of the elastic time-history analysis. The results show that under rare earthquake, the maximum interstory displacement angle of the structure is less than 1 / 50 of the limit value of the standard elastic-plastic interstory displacement angle, and the overall performance of the structure meets the level of fortification of "strong earthquake does not fail", and the damage of the member indicates that the beam has more hinges out of the structure. The frame columns yield only at the bottom of the column, the edge frame is damaged seriously, the torsional edge effect is obvious, which is consistent with the structural torsional effect, the structural members satisfy the yield mechanism of "strong column and weak beam", and the whole failure accords with the expected damage mechanism of the frame. (4) the plane of the structure is irregular, the stress of each floor under the frequent earthquake and rare earthquake is analyzed by SAP2000, the stress cloud diagram can directly observe the relative weak position of the structure floor; (5) considering the engineering application, Review according to the documents of China Seismological Bureau, and carry out seismic strengthening measures. The results of the above analysis show that, under earthquake action, the plane L-shaped building structure has a certain bearing capacity and deformation capacity through reasonable structure arrangement and some seismic strengthening measures, although the shape of the structure is irregular. The seismic fortification target and seismic performance index of "small earthquake elasticity" and "large earthquake will not fail" are achieved. Through the elastic-plastic calculation and analysis under rare earthquake, the potential seismic weak part of the structure is found, and the corresponding anti-seismic strengthening measures are put forward, which can provide a reference for engineering design.
【學位授予單位】：安徽建筑大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU352.11

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本文編號：2068429