地鐵周邊建筑物的豎向減振措施研究
發(fā)布時間：2018-08-05 19:58
【摘要】：為緩解全球大氣變暖及交通擁堵的情況,地鐵由于其環(huán)保、快捷、舒適、安全、高效的優(yōu)勢,在近年來得到迅速發(fā)展。但是因為地鐵要不可避免的穿越城市中心,以及軌道密度、行車密度越來越高,其運行誘發(fā)的振動對建筑物內(nèi)部的人們的生活產(chǎn)生重大影響。在結合國內(nèi)外對地鐵周邊建筑物減振研究的基礎上,采用碟形彈簧隔振裝置對一框架結構進行減振,通過模態(tài)分析和時程分析,分析隔振前后的振動特性表以及對比隔振前后每層的豎向加速度及層間位移,以驗證碟形彈簧隔振支座的隔振效果。論文主要成果如下:1)對已有研究成果進行總結,探討列車運行引起的振動的機理、傳播途經(jīng)及規(guī)律、建筑物對振動的響應以及減振措施。了解碟形彈簧特性,并以此為基礎結合本框架結構設計不同組合的隔振支座。2)以ADINA有限元軟件為基礎建立土體模型,分析了不同黏土層對振動特性的影響以及振動在土體中的傳播規(guī)律,得出以下結論:黏土層的彈性模量越大,其峰值加速度越小,衰減也較快,并且高強度的振動持續(xù)時間相對較短,然而彈性模量較小的黏土層中,加速度幅值較大,振動衰減較慢。3)采用SAP2000有限元軟件建立一框架結構模型,然后用整體輸入的方式,分析了當黏土層彈性模量為20 MPa時,地鐵運行引起的振動波對其的影響,得出以下結論:框架結構的底層和頂部振動較為強烈,中間樓層較弱,同時建筑結構對振動的響應主要以2~15 Hz的低頻振動為主,并且樓層越高,低頻振動的影響越明顯。4)建立了有隔振支座和無隔振支座的兩個框架模型,通過計算分析,得出以下結論:碟形彈簧隔振支座可使上部結構的周期變長,豎向加速度大幅減少,豎向隔振效率可達51.23%~93.81%,隔振后的樓層層間位移變化平緩,同時復合后的碟簧剛度越小,隔振效果越明顯。
[Abstract]:In order to alleviate global warming and traffic congestion, the subway has developed rapidly in recent years because of its environmental, fast, comfortable, safe and efficient advantages. But because the subway must inevitably cross the center of the city, and the density of the track, the density of the driving is getting higher and higher. The vibration induced by the subway runs to the people in the building. On the basis of the study of vibration damping of the surrounding buildings around the subway, the disc spring vibration isolation device is used to reduce the vibration damping of a frame structure. Through modal analysis and time history analysis, the vibration characteristic table before and after vibration isolation and the vertical acceleration and interlayer displacement of each layer before and after isolation are compared to verify the disc shape. The main achievements of this paper are as follows: 1) the main achievements of the paper are as follows: the existing research results are summarized, the mechanism of vibration caused by the train operation, the propagation path and the law, the response of the building to vibration and the damping measures are discussed. The characteristics of the disc spring are understood, and the vibration isolation of different combinations based on this frame structure is designed on the basis of this frame structure. Base.2) based on the ADINA finite element software, the soil model was established. The influence of different clay layers on the vibration characteristics and the propagation law of vibration in the soil were analyzed. The following conclusion was drawn: the larger the modulus of the clay layer, the smaller the peak acceleration, the faster the attenuation, and the relatively short duration of the high intensity vibration. However, the elastic modulus of the high strength is relatively short. In the clay layer with small modulus, the acceleration amplitude is larger, the vibration attenuation is slow.3), a frame structure model is established by the SAP2000 finite element software. Then the influence of the vibration wave caused by the subway operation when the elastic modulus of the clay layer is 20 MPa is analyzed. The following conclusions are drawn: the bottom and the top of the frame structure. The vibration is strong and the middle floor is weak. At the same time, the response of the building structure to the vibration is mainly based on the low frequency vibration of 2~15 Hz, and the higher the floor is, the more obvious the influence of the low frequency vibration is.4). The two frame models of the vibration isolation bearing and the non isolating support are established. The following conclusion is drawn by the calculation and analysis: the disc spring isolation bearing can make the following conclusion The period of the superstructure becomes longer, the vertical acceleration is reduced greatly, the vertical vibration isolation efficiency can reach 51.23%~93.81%, and the interlayer displacement of the floor after vibration isolation is slow. At the same time, the smaller the disc spring stiffness is, the more obvious the vibration isolation effect is.
【學位授予單位】：華北理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU352.1
[Abstract]:In order to alleviate global warming and traffic congestion, the subway has developed rapidly in recent years because of its environmental, fast, comfortable, safe and efficient advantages. But because the subway must inevitably cross the center of the city, and the density of the track, the density of the driving is getting higher and higher. The vibration induced by the subway runs to the people in the building. On the basis of the study of vibration damping of the surrounding buildings around the subway, the disc spring vibration isolation device is used to reduce the vibration damping of a frame structure. Through modal analysis and time history analysis, the vibration characteristic table before and after vibration isolation and the vertical acceleration and interlayer displacement of each layer before and after isolation are compared to verify the disc shape. The main achievements of this paper are as follows: 1) the main achievements of the paper are as follows: the existing research results are summarized, the mechanism of vibration caused by the train operation, the propagation path and the law, the response of the building to vibration and the damping measures are discussed. The characteristics of the disc spring are understood, and the vibration isolation of different combinations based on this frame structure is designed on the basis of this frame structure. Base.2) based on the ADINA finite element software, the soil model was established. The influence of different clay layers on the vibration characteristics and the propagation law of vibration in the soil were analyzed. The following conclusion was drawn: the larger the modulus of the clay layer, the smaller the peak acceleration, the faster the attenuation, and the relatively short duration of the high intensity vibration. However, the elastic modulus of the high strength is relatively short. In the clay layer with small modulus, the acceleration amplitude is larger, the vibration attenuation is slow.3), a frame structure model is established by the SAP2000 finite element software. Then the influence of the vibration wave caused by the subway operation when the elastic modulus of the clay layer is 20 MPa is analyzed. The following conclusions are drawn: the bottom and the top of the frame structure. The vibration is strong and the middle floor is weak. At the same time, the response of the building structure to the vibration is mainly based on the low frequency vibration of 2~15 Hz, and the higher the floor is, the more obvious the influence of the low frequency vibration is.4). The two frame models of the vibration isolation bearing and the non isolating support are established. The following conclusion is drawn by the calculation and analysis: the disc spring isolation bearing can make the following conclusion The period of the superstructure becomes longer, the vertical acceleration is reduced greatly, the vertical vibration isolation efficiency can reach 51.23%~93.81%, and the interlayer displacement of the floor after vibration isolation is slow. At the same time, the smaller the disc spring stiffness is, the more obvious the vibration isolation effect is.
【學位授予單位】：華北理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU352.1
【參考文獻】
相關期刊論文 前10條
1 樓夢麟;賈旭鵬;俞潔勤;;地鐵運行引起的地面振動實測及傳播規(guī)律分析[J];防災減災工程學報;2009年03期
2 宋晶;郝s，
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