本文選題：阻尼填充墻　切入點(diǎn)：高烈度區(qū)　出處：《合肥工業(yè)大學(xué)》2017年碩士論文

【摘要】：框架核心筒結(jié)構(gòu)由于具有很好的抗震性能,是國(guó)內(nèi)外高層建筑和超高層建筑廣泛采用的結(jié)構(gòu)形式之一。在高烈度地區(qū)采用框架核心筒結(jié)構(gòu)體系,為了滿足結(jié)構(gòu)抗震設(shè)計(jì)的要求,結(jié)構(gòu)的受力構(gòu)件需要較大的截面尺寸和配筋,不僅成本增加,還增加施工的難度,同時(shí)結(jié)構(gòu)自重的增加又不利于抗震。阻尼填充墻作為一種新型的耗能減震體系,利用其阻尼層的剪切滯回變形,耗散輸入結(jié)構(gòu)的地震能量,為提高結(jié)構(gòu)的抗震性能提供新的方法。本文在分析以往學(xué)者關(guān)于阻尼填充墻研究成果的基礎(chǔ)上,從多個(gè)角度對(duì)阻尼填充墻在框架核心筒結(jié)構(gòu)中的應(yīng)用進(jìn)行研究,提出了一些建議和結(jié)論。主要研究?jī)?nèi)容如下:(1)對(duì)阻尼填充墻進(jìn)行了理論研究,介紹了阻尼填充墻的工作機(jī)理和阻尼填充墻的簡(jiǎn)化力學(xué)模型,并給出模擬單元在有限元軟件中參數(shù)的取值;(2)以某25層框架核心筒結(jié)構(gòu)的實(shí)際工程為研究對(duì)象,利用有限元軟件建立原結(jié)構(gòu)和阻尼填充墻加固后整體結(jié)構(gòu)的三維空間模型。通過(guò)對(duì)結(jié)構(gòu)進(jìn)行靜力分析可知,阻尼填充墻可為結(jié)構(gòu)提供一定的抗側(cè)剛度和附加阻尼,使樓層層間位移和層間位移角都減小,結(jié)構(gòu)的動(dòng)力反應(yīng)降低,結(jié)構(gòu)的抗震性能得到改善。同時(shí),框架核心筒主體結(jié)構(gòu)承擔(dān)的樓層剪力減小,有效保護(hù)了主體結(jié)構(gòu)免受地震作用破壞;(3)通過(guò)對(duì)結(jié)構(gòu)進(jìn)行時(shí)程分析可知,設(shè)置阻尼填充墻后,可有效降低結(jié)構(gòu)的位移響應(yīng),減小層間位移角并使之滿足規(guī)范要求,阻尼填充墻耗散輸入地震的大部分能量,起到了充當(dāng)耗能減震第一道防線的作用,同時(shí)由于阻尼填充墻的特殊構(gòu)造形式,地震時(shí)墻體平面內(nèi)不會(huì)提前破壞;(4)建立另外兩種不同阻尼填充墻布置形式的結(jié)構(gòu)體系,通過(guò)對(duì)結(jié)構(gòu)進(jìn)行反應(yīng)譜分析和時(shí)程分析可知,阻尼填充墻的位置和數(shù)量都會(huì)影響整體結(jié)構(gòu)的抗震性能,合理的布置阻尼填充墻,不僅能夠提高經(jīng)濟(jì)性,還能增加結(jié)構(gòu)的安全性。
[Abstract]:Because of its good seismic performance, frame core tube structure is one of the widely used structural forms in high-rise buildings and super high-rise buildings at home and abroad.In order to meet the requirements of seismic design of frame core tube structure system in high intensity area, the structural members need larger section size and reinforcement, which not only increase the cost, but also increase the difficulty of construction.At the same time, the increase of structural weight is not conducive to earthquake resistance.As a new type of energy dissipation and seismic absorption system, the damping infill wall provides a new method for improving the seismic performance of the structure by using the shear hysteretic deformation of the damping layer and dissipating the seismic energy of the input structure.On the basis of analyzing the previous research achievements of damped infilled wall, this paper studies the application of damped infilled wall in frame core tube structure from several angles, and puts forward some suggestions and conclusions.The main research contents are as follows: (1) A theoretical study on the damping infill wall is carried out, and the working mechanism of the damped infill wall and the simplified mechanical model of the damped infill wall are introduced.Taking the actual engineering of a 25-story frame-tube structure as the research object, the three-dimensional spatial model of the original structure and the whole structure strengthened by damped infilled wall is established by using the finite element software.Through the static analysis of the structure, it can be known that the damping infill wall can provide certain lateral stiffness and additional damping for the structure, reduce the interstory displacement and the interstory displacement angle, reduce the dynamic response of the structure, and improve the seismic performance of the structure.At the same time, the floor shear force of the main structure of the frame core tube is reduced, which effectively protects the main structure from earthquake damage. Through the time-history analysis of the structure, it is known that the displacement response of the structure can be effectively reduced by setting the damped infilled wall.Reducing the interstory displacement angle to meet the requirements of the specifications, the damping fill wall dissipates most of the input energy of the earthquake, which acts as the first line of defense for the energy dissipation and shock absorption. At the same time, because of the special structural form of the damping filled wall,During the earthquake, the wall plane will not be destroyed in advance) the other two kinds of structural systems with different damping infill wall arrangement are established. The response spectrum analysis and time history analysis of the structure can be concluded by means of the analysis of the response spectrum and the time history of the structure.The location and quantity of damped infill wall will affect the seismic performance of the whole structure. The reasonable arrangement of damped infilled wall can not only improve the economy but also increase the safety of the structure.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU973

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