【摘要】：隨著社會進(jìn)步,人們對于建筑的功能要求越來越高,下部作為公共場所需要大空間,而上部作為住宅或者辦公樓則需要小空間,因此常常設(shè)置轉(zhuǎn)換層來滿足受力要求和功能要求。梁式轉(zhuǎn)換具有其特殊優(yōu)勢,在工程中廣泛采用,發(fā)展空間很大。本文介紹了本課題的研究背景和現(xiàn)實(shí)意義,闡述了轉(zhuǎn)換結(jié)構(gòu)的研究現(xiàn)狀,總結(jié)了結(jié)構(gòu)抗震理論及其計(jì)算方法。算例為一帶梁式轉(zhuǎn)換的結(jié)構(gòu),分析了轉(zhuǎn)換位置和結(jié)構(gòu)外圍落地剪力墻厚度不同時(shí)高層結(jié)構(gòu)的抗震性能。首先使用SATWE對比分析了不同模型結(jié)構(gòu)的地震反應(yīng),比如剪力、位移等;再使用Midas/gen采用振型反應(yīng)譜與動(dòng)力彈性時(shí)程分析法,將二者結(jié)果進(jìn)行對比。對不設(shè)轉(zhuǎn)換和在第1、3、5層分別設(shè)梁式轉(zhuǎn)換時(shí)的高層結(jié)構(gòu),比較分析其抗震性能(包括自振周期、剪力、位移和位移角等),發(fā)現(xiàn)無轉(zhuǎn)換層和轉(zhuǎn)換層設(shè)在第1層時(shí),結(jié)構(gòu)特性基本一致,其樓層剪力、層間位移、位移角等基本相同;隨著轉(zhuǎn)換位置改變,周期、樓層剪力、傾覆力矩、樓層位移沒有明顯的變化,而在高位轉(zhuǎn)換時(shí)層間剪力、層間位移、位移角在轉(zhuǎn)換位置發(fā)生突變,并且轉(zhuǎn)換位置越高,地震反應(yīng)就越劇烈,突變就越嚴(yán)重;外圍落地剪力墻越薄,各層剪力也越小,只是轉(zhuǎn)換結(jié)構(gòu)下面樓層要比上面樓層減小得更多,而層間位移則明顯增大,并且轉(zhuǎn)換結(jié)構(gòu)下面樓層比上面樓層增大得更多,從而在結(jié)構(gòu)設(shè)計(jì)時(shí),需要注意轉(zhuǎn)換層上下剛度比的控制;全樓板彈性假定較全樓板剛性假定和僅轉(zhuǎn)換層彈性假定下結(jié)構(gòu)的層間位移更大,抗震變形驗(yàn)算時(shí)應(yīng)按全樓板彈性假定驗(yàn)算結(jié)構(gòu)變形;根據(jù)地震動(dòng)的有效峰值、頻譜特性和持時(shí)來合理的選擇地震波,再將時(shí)程法與反應(yīng)譜法的結(jié)果對比,結(jié)果基本相同,即使控制所選地震波的峰值一致,由于其頻譜特性不同,造成不同的地震波所得到的動(dòng)力時(shí)程分析結(jié)果也存在一定的差異。
[Abstract]:With the progress of society, people have higher and higher demands on the function of buildings. The lower part of the building needs a large space as a public place, while the upper part of a building needs a small space as a residence or office building. Therefore, the conversion layer is often set to meet the stress requirements and functional requirements. Beam-type conversion has its special advantages, widely used in engineering, great space for development. This paper introduces the research background and practical significance of this subject, expounds the present research situation of the conversion structure, summarizes the seismic theory of the structure and its calculation method. The seismic behavior of high-rise structures with different thickness of floor shear wall and transfer position is analyzed. First, the seismic responses of different model structures, such as shear force, displacement, etc., are compared by SATWE, and then by Midas/gen, the modal response spectrum and dynamic elastic time-history analysis are used to compare the two results. The aseismic performance (including natural vibration period, shear force, displacement and displacement angle, etc.) of high-rise structures without conversion and with beam type transfer on the 1st floor is compared and analyzed. It is found that when the transfer layer and the transfer layer are located on the first floor, the seismic behavior of the high-rise structure is compared and analyzed, which includes the natural vibration period, the shear force, the displacement and the displacement angle, etc. The characteristics of the structure are basically the same, its floor shear force, interstory displacement, displacement angle and so on are basically the same; with the change of position, period, floor shear force, overturning moment and floor displacement, there is no obvious change. The interstory displacement, the angle of displacement changes in the transition position, and the higher the transition position, the more violent the earthquake response is, and the more serious the sudden change is, the thinner the surrounding shear wall is, the smaller the shear force is on each floor. It's just that the lower floor of the conversion structure is much smaller than the upper floor, while the interstory displacement is significantly increased, and the lower floor of the conversion structure is much larger than the upper floor, so that when the structure is designed, It is necessary to pay attention to the control of the ratio of the upper and lower stiffness of the transfer floor, the elastic assumption of the whole floor is larger than that of the rigid assumption of the whole floor and the interstory displacement of the structure under the elastic assumption of only the transfer floor, and the structural deformation should be checked according to the elastic assumption of the whole floor when checking the seismic deformation. According to the effective peak value of ground motion, the frequency spectrum characteristic and the duration of seismic wave, and then comparing the results of the time process method with the response spectrum method, the results are basically the same, even though the peak value of the seismic wave controlled by the selected seismic wave is the same, because of its different spectrum characteristics, There are also some differences in the results of dynamic time history analysis for different seismic waves.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU973.31

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