發(fā)布時(shí)間：2018-05-30 03:12

  本文選題：動(dòng)力測(cè)試 + 框-剪結(jié)構(gòu)　； 參考：《中國(guó)地震局地震研究所》2013年碩士論文

【摘要】：我國(guó)是一個(gè)地震多發(fā)國(guó)家，地震中大部分人員傷亡是由房屋及構(gòu)筑體倒塌所造成的，做好房屋的抗震設(shè)防是保障人民生命財(cái)產(chǎn)安全的前提。隨著高層建筑的不斷增多，其結(jié)構(gòu)抗震分析成為一個(gè)熱點(diǎn)研究問題。實(shí)際在役建筑物動(dòng)力性的測(cè)定，對(duì)建筑物的抗震設(shè)計(jì)及其抗震性能的評(píng)價(jià)具有重要意義。文章以湖北省防震減災(zāi)信息綜合大樓框架剪力墻結(jié)構(gòu)為研究目標(biāo)，對(duì)其進(jìn)行結(jié)構(gòu)動(dòng)力特性測(cè)試和有限元抗震性能分析，以期得出一些有益的研究成果。 本文首先采用脈動(dòng)測(cè)試方法對(duì)結(jié)構(gòu)進(jìn)行動(dòng)力特性測(cè)試，通過數(shù)據(jù)頻譜分析，確定其模態(tài)參數(shù)。在動(dòng)力特性測(cè)試的基礎(chǔ)上，利用ETABS軟件對(duì)結(jié)構(gòu)進(jìn)行模態(tài)分析，對(duì)比分析二者的結(jié)果，并對(duì)具體數(shù)值差異做出分析。再基于模態(tài)分析，對(duì)其進(jìn)行地震反應(yīng)譜分析和動(dòng)力時(shí)程分析，研究其地震響應(yīng)性能。文章主要研究?jī)?nèi)容為： 1.結(jié)構(gòu)動(dòng)力特性測(cè)試。利用固定安裝在大樓上的Basalt8X型強(qiáng)震儀器，同步監(jiān)測(cè)環(huán)境振動(dòng)下結(jié)構(gòu)在三個(gè)方向上的加速度響應(yīng)，對(duì)加速度數(shù)據(jù)進(jìn)行頻譜分析，獲得結(jié)構(gòu)的前四階平動(dòng)振動(dòng)頻率和前兩階扭轉(zhuǎn)振動(dòng)頻率。 2.有限元模態(tài)分析。針對(duì)已有建筑物、結(jié)合設(shè)計(jì)院提供的圖紙，利用ETABS軟件建立結(jié)構(gòu)三維有限元模型，進(jìn)行模態(tài)分析，獲得結(jié)構(gòu)的自振頻率、振型等特性，再與脈動(dòng)所得結(jié)果進(jìn)行對(duì)比，發(fā)現(xiàn)測(cè)試所得結(jié)構(gòu)自振周期普遍小于有限元分析結(jié)果。經(jīng)分析發(fā)現(xiàn)，兩者之間的差異主要為：有限元模型參數(shù)的選取，如彈性模量等；非結(jié)構(gòu)構(gòu)件對(duì)結(jié)構(gòu)剛度的影響，如填充墻等。 3.結(jié)構(gòu)地震反應(yīng)分析。選用《武漢市主城規(guī)劃區(qū)地震動(dòng)參數(shù)小區(qū)劃》中規(guī)定的場(chǎng)地類型及地震動(dòng)參數(shù)，進(jìn)行不同超越概率地震作用下結(jié)構(gòu)的反應(yīng)譜分析，對(duì)樓層剛度、樓層位移、層間位移角等控制因素進(jìn)行分析，發(fā)現(xiàn)該大樓在各個(gè)方向剛度比較均勻，受力條件良好，變形滿足規(guī)范的要求；利用小區(qū)劃的地震影響系數(shù)曲線，，從美國(guó)PGMD數(shù)據(jù)庫(kù)中篩選五組實(shí)際地震波及兩組人工波，每個(gè)時(shí)程工況均輸入三個(gè)方向的地震波，得到結(jié)構(gòu)響應(yīng)位移、速度、加速度等時(shí)程曲線，各地震波作用下最大基底剪力均大于反應(yīng)譜法基底剪力的65%，所有時(shí)程分析下的基底剪力平均值大于反應(yīng)譜分析的80%，滿足抗震設(shè)計(jì)規(guī)范的要求。反應(yīng)譜分析和時(shí)程分析均顯示，該大樓結(jié)構(gòu)構(gòu)件布置合理、剛度分布比較均勻，抗震性能良好。
[Abstract]:China is an earthquake-prone country. Most of the casualties in the earthquake are caused by the collapse of buildings and structures. It is a prerequisite to ensure the safety of people's lives and property to do a good job of building seismic fortification. With the increasing of high-rise buildings, seismic analysis of their structures has become a hot topic. The measurement of the dynamic property of buildings in service is of great significance to the seismic design of buildings and the evaluation of their seismic performance. This paper takes the frame shear wall structure of earthquake prevention and disaster reduction information complex building in Hubei Province as the research goal, carries on the structural dynamic characteristic test and the finite element seismic performance analysis to it, in order to obtain some beneficial research results. In this paper, the dynamic characteristics of the structure are measured by pulsation test method, and the modal parameters are determined by the data spectrum analysis. On the basis of the dynamic characteristic test, the modal analysis of the structure is carried out by using ETABS software, the results of which are compared and analyzed, and the concrete numerical differences are analyzed. Based on modal analysis, seismic response spectrum analysis and dynamic time history analysis are carried out to study its seismic response performance. The main contents of this paper are as follows: 1. Testing of dynamic characteristics of structures. The acceleration response of the structure in three directions under the environment vibration is monitored synchronously by using the Basalt8X type strong earthquake instrument fixed on the building, and the acceleration data are analyzed in the frequency spectrum. The first four order translational vibration frequency and the first two order torsional vibration frequency of the structure are obtained. 2. Finite element modal analysis. In view of the existing buildings, combined with the drawings provided by the design institute, the three-dimensional finite element model of the structure was established by using ETABS software, and the modal analysis was carried out to obtain the characteristics of the structure, such as the natural vibration frequency, the mode shape, and so on, and then compared with the results obtained by the pulsation. It is found that the natural vibration period of the tested structures is generally smaller than that of the finite element analysis. It is found that the difference between them is the selection of finite element model parameters, such as elastic modulus, and the influence of non-structural members on structural stiffness, such as infilled walls, etc. 3. Structural seismic response analysis. The site types and ground motion parameters specified in "the ground motion parameter subdivision of the main urban planning area of Wuhan" are selected to analyze the response spectrum of the structure under the action of different transcendental earthquakes, and the floor stiffness and floor displacement are analyzed. Through the analysis of the control factors such as interstory displacement angle, it is found that the stiffness of the building is uniform in all directions, the stress condition is good, the deformation meets the requirements of the code, and the seismic influence coefficient curve of the microzonation is used. Five groups of actual earthquakes and two groups of artificial waves were screened from the PGMD database of the United States. The seismic waves in three directions were input into each time-history condition, and the time-history curves of displacement, velocity and acceleration of the structure were obtained. The maximum base shear force under the action of each seismic wave is greater than that of the base shear force of the response spectrum method, and the average value of the base shear force under all time-history analysis is greater than that of the response spectrum analysis, which meets the requirements of the seismic design code. Both the response spectrum analysis and the time history analysis show that the structural members of the building are reasonably arranged, the stiffness distribution is more uniform, and the seismic performance is good.
【學(xué)位授予單位】：中國(guó)地震局地震研究所
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU311.3;TU398.2

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