發(fā)布時(shí)間：2018-06-26 01:26

  本文選題：框架結(jié)構(gòu) + L形平面��； 參考：《安徽建筑大學(xué)》2013年碩士論文

【摘要】：改革開放以來我國(guó)經(jīng)濟(jì)得到了長(zhǎng)足發(fā)展，各種體型復(fù)雜、不規(guī)則的建筑逐漸成為人們的追求。但是從結(jié)構(gòu)角度講，建筑結(jié)構(gòu)越是平面、立面形狀復(fù)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(jì)損失，其抗震分析和設(shè)計(jì)一直受到各國(guó)學(xué)者高度重視和廣泛研究。因此，對(duì)體型復(fù)雜、不規(guī)則的建筑結(jié)構(gòu)進(jìn)行抗震性能的研究有著重要的理論價(jià)值和實(shí)際意義。 本文選取一重點(diǎn)設(shè)防類的平面L型幼兒園框架結(jié)構(gòu)為研究對(duì)象，確定合理的計(jì)算模型，以有限元為主要研究手段進(jìn)行抗震性能化設(shè)計(jì)的研究。本文主要研究工作如下： （1）運(yùn)用SAP2000結(jié)構(gòu)分析軟件，進(jìn)行多遇地震下的振型分解反應(yīng)譜分析； （2）運(yùn)用SAP2000結(jié)構(gòu)分析軟件，選取三條地震波，進(jìn)行地震作用下的彈性時(shí)程分析，對(duì)比、分析了該結(jié)構(gòu)在彈性階段的反應(yīng)譜分析和動(dòng)力時(shí)程分析結(jié)果。結(jié)果表明：該結(jié)構(gòu)滿足“小震不壞”的抗震性能指標(biāo)，所選三條地震波滿足《建筑抗震設(shè)計(jì)規(guī)范》的選波要求； （3）運(yùn)用SAP2000結(jié)構(gòu)分析軟件，選擇合理的計(jì)算模型，對(duì)結(jié)構(gòu)進(jìn)行非線性動(dòng)力分析，分析結(jié)構(gòu)在三條地震波作用下的動(dòng)力特性及地震時(shí)的受力變形情況，并與彈性時(shí)程分析的結(jié)果進(jìn)行對(duì)比。結(jié)果表明：罕遇地震下，結(jié)構(gòu)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(jié)構(gòu)整體性能滿足“大震不倒”的設(shè)防水準(zhǔn)；構(gòu)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(duì)嚴(yán)重，扭轉(zhuǎn)邊榀效應(yīng)較明顯，這與結(jié)構(gòu)扭轉(zhuǎn)效應(yīng)相一致；結(jié)構(gòu)構(gòu)件滿足“強(qiáng)柱弱梁”的屈服機(jī)制，整體破壞符合框架預(yù)期損傷機(jī)制； （4）結(jié)構(gòu)平面凹凸不規(guī)則，采用SAP2000對(duì)多遇地震及罕遇地震下各層樓板應(yīng)力進(jìn)行分析，應(yīng)力云圖可直觀地觀察到結(jié)構(gòu)樓面的相對(duì)薄弱部位； （5）考慮工程應(yīng)用，按中國(guó)地震局文件規(guī)定復(fù)核，并進(jìn)行抗震加強(qiáng)措施研究。 綜上分析結(jié)果表明：在地震作用下，該平面L型建筑結(jié)構(gòu)雖然形體不規(guī)則，但通過合理的結(jié)構(gòu)布置和一些抗震加強(qiáng)措施，可使結(jié)構(gòu)具備一定的承載與變形能力，使達(dá)到“小震彈性”、“大震不倒”的抗震設(shè)防目標(biāo)及抗震性能指標(biāo)。通過在罕遇地震下的彈塑性計(jì)算分析，找到結(jié)構(gòu)的潛在抗震薄弱部位，提出了相應(yīng)的結(jié)構(gòu)抗震加強(qiáng)措施，為工程設(shè)計(jì)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(xué)位授予單位】：安徽建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU352.11

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本文編號(hào)：2068429