地鐵周邊建筑物的豎向減振措施研究
發(fā)布時(shí)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(shì),在近年來(lái)得到迅速發(fā)展。但是因?yàn)榈罔F要不可避免的穿越城市中心,以及軌道密度、行車密度越來(lái)越高,其運(yùn)行誘發(fā)的振動(dòng)對(duì)建筑物內(nèi)部的人們的生活產(chǎn)生重大影響。在結(jié)合國(guó)內(nèi)外對(duì)地鐵周邊建筑物減振研究的基礎(chǔ)上,采用碟形彈簧隔振裝置對(duì)一框架結(jié)構(gòu)進(jìn)行減振,通過(guò)模態(tài)分析和時(shí)程分析,分析隔振前后的振動(dòng)特性表以及對(duì)比隔振前后每層的豎向加速度及層間位移,以驗(yàn)證碟形彈簧隔振支座的隔振效果。論文主要成果如下:1)對(duì)已有研究成果進(jìn)行總結(jié),探討列車運(yùn)行引起的振動(dòng)的機(jī)理、傳播途經(jīng)及規(guī)律、建筑物對(duì)振動(dòng)的響應(yīng)以及減振措施。了解碟形彈簧特性,并以此為基礎(chǔ)結(jié)合本框架結(jié)構(gòu)設(shè)計(jì)不同組合的隔振支座。2)以ADINA有限元軟件為基礎(chǔ)建立土體模型,分析了不同黏土層對(duì)振動(dòng)特性的影響以及振動(dòng)在土體中的傳播規(guī)律,得出以下結(jié)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(qiáng)度的振動(dòng)持續(xù)時(shí)間相對(duì)較短,然而彈性模量較小的黏土層中,加速度幅值較大,振動(dòng)衰減較慢。3)采用SAP2000有限元軟件建立一框架結(jié)構(gòu)模型,然后用整體輸入的方式,分析了當(dāng)黏土層彈性模量為20 MPa時(shí),地鐵運(yùn)行引起的振動(dòng)波對(duì)其的影響,得出以下結(jié)論:框架結(jié)構(gòu)的底層和頂部振動(dòng)較為強(qiáng)烈,中間樓層較弱,同時(shí)建筑結(jié)構(gòu)對(duì)振動(dòng)的響應(yīng)主要以2~15 Hz的低頻振動(dòng)為主,并且樓層越高,低頻振動(dòng)的影響越明顯。4)建立了有隔振支座和無(wú)隔振支座的兩個(gè)框架模型,通過(guò)計(jì)算分析,得出以下結(jié)論:碟形彈簧隔振支座可使上部結(jié)構(gòu)的周期變長(zhǎng),豎向加速度大幅減少,豎向隔振效率可達(dá)51.23%~93.81%,隔振后的樓層層間位移變化平緩,同時(shí)復(fù)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(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：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(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.1
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 樓夢(mèng)麟;賈旭鵬;俞潔勤;;地鐵運(yùn)行引起的地面振動(dòng)實(shí)測(cè)及傳播規(guī)律分析[J];防災(zāi)減災(zāi)工程學(xué)報(bào);2009年03期
2 宋晶;郝s，
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