軟鋼阻尼器在鋼結(jié)構(gòu)加層改造中的減震性能研究
本文選題:鋼結(jié)構(gòu)直接加層 切入點(diǎn):框剪結(jié)構(gòu) 出處:《青島理工大學(xué)》2013年碩士論文
【摘要】:鋼結(jié)構(gòu)直接加層技術(shù)以其獨(dú)特的優(yōu)點(diǎn),在房屋加層改造中的應(yīng)用最為常見(jiàn),但是鋼結(jié)構(gòu)直接加層后結(jié)構(gòu)普遍存在著下剛上柔的現(xiàn)象,并且加層部分鋼框架結(jié)構(gòu)的抗側(cè)剛度有限,因此在房屋高度較高及水平力較大的情況下,結(jié)構(gòu)的側(cè)向變形會(huì)較大,不易滿(mǎn)足相應(yīng)規(guī)范的要求,而我國(guó)又是一個(gè)多發(fā)地震國(guó)家,因此對(duì)直接加層結(jié)構(gòu)的抗震性能研究顯得尤為重要,本文主要內(nèi)容: (1)闡述了加層結(jié)構(gòu)改造技術(shù)及國(guó)內(nèi)外應(yīng)用現(xiàn)狀和發(fā)展前景,鋼結(jié)構(gòu)直接加層存在的剛度突變及帶來(lái)的鞭梢效應(yīng),結(jié)構(gòu)減震技術(shù)的應(yīng)用及各類(lèi)控制方法,闡述了軟鋼阻尼器耗能減震的原理及其開(kāi)發(fā)和解決的問(wèn)題。 (2)框剪結(jié)構(gòu)不同加層體系的時(shí)程反應(yīng)分析:對(duì)一幢10層框剪結(jié)構(gòu)的既有建筑擴(kuò)展到鋼結(jié)構(gòu)直接加層結(jié)構(gòu)、未設(shè)支撐、設(shè)有普通支撐和安裝有耗能減震裝置(軟鋼阻尼器)的加層鋼結(jié)構(gòu),對(duì)其進(jìn)行罕遇地震下的時(shí)程反應(yīng),,比較分析得出軟鋼耗能減震裝置在不同加層體系中發(fā)揮的重要作用。 (3)闡述了軟鋼耗能減震裝置在加層鋼結(jié)構(gòu)中不同布置位置下,在罕遇地震下時(shí)程反應(yīng)減震效果的影響,計(jì)算結(jié)果為實(shí)際工程中軟鋼阻尼器在結(jié)構(gòu)加層改造中的應(yīng)用提供初步的判斷,科學(xué)合理的布置軟鋼阻尼器,使軟鋼阻尼器發(fā)揮最大的耗能減震作用。 (4)耗能阻尼器與結(jié)構(gòu)結(jié)合,一般都是通過(guò)支撐,不同的支撐形式在受力性能上有不同之處,會(huì)影響到阻尼器的減震效果,也會(huì)影響到建筑的使用功能,合理的支撐形式會(huì)使軟鋼阻尼器在框剪結(jié)構(gòu)加層中發(fā)揮更好的減震效果。鑒于以上因素,本課題研究了不同支撐形式對(duì)軟鋼阻尼器在框剪結(jié)構(gòu)加層體系中減震效果的影響,為軟鋼阻尼器在框剪結(jié)構(gòu)加層改造中的應(yīng)用提供一定參考。
[Abstract]:Because of its unique advantages, the direct layer adding technology of steel structure is the most common application in the retrofitting of buildings. However, the phenomenon of inflexion and upper flexibility is common in the steel structure after adding layer directly, and the lateral stiffness of the steel frame structure is limited.Therefore, when the building height is high and the horizontal force is large, the lateral deformation of the structure will be larger, and it is difficult to meet the requirements of the corresponding code. And China is a country with multiple earthquakes.Therefore, it is very important to study the seismic behavior of the direct adding story structure. The main contents of this paper are as follows:This paper expounds the retrofit technology of adding layer structure, the present situation and development prospect of its application at home and abroad, the sudden change of rigidity and the whipping effect of steel structure directly adding layer, the application of structural shock absorption technology and various control methods.The principle, development and solution of energy dissipation of mild steel dampers are described.The time-history response analysis of different story adding system of frame shear structure: the existing building of a 10-story frame shear structure is extended to the steel structure directly adding story structure without support.(3) the effect of time-history response on the damping effect of soft steel energy dissipation devices under rare earthquakes in different positions of steel structures with additional layers is expounded.The results provide a preliminary judgement for the application of soft steel dampers in the retrofitting of structures, and a scientific and reasonable arrangement of soft steel dampers, so that the flexible steel dampers can play the greatest role in energy dissipation and seismic absorption.4) the combination of energy dissipation dampers and structures is generally through bracing. Different forms of support have different mechanical properties, which will affect the damping effect of dampers and the use of buildings.The reasonable bracing form will make the soft steel damper play a better effect in the frame-shear structure adding layer.In view of the above factors, the effect of different bracing forms on the damping effect of soft steel dampers in frame-shear structures is studied in this paper, which provides a certain reference for the application of soft steel dampers in the retrofitting of frame-shear structures.
【學(xué)位授予單位】:青島理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類(lèi)號(hào)】:TU352.1;TU391
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