基于某城市地鐵激勵(lì)的鄰近建筑振動(dòng)響應(yīng)預(yù)測(cè)
發(fā)布時(shí)間：2019-06-27 21:14
【摘要】：研究目的:某城市地鐵正在建設(shè),為取得較為可靠的地鐵運(yùn)行對(duì)鄰近建筑振動(dòng)影響的預(yù)測(cè)精度,有必要對(duì)地質(zhì)條件較為特殊的該城市地鐵沿線開(kāi)展特定研究。本文針對(duì)該城市中軟Ⅲ類場(chǎng)地土,建立地鐵列車-軌道垂向耦合振動(dòng)數(shù)值模型及隧道-土體-建筑有限元模型,參考該城市地鐵參數(shù),對(duì)鄰近地鐵的一般建筑在地鐵運(yùn)行時(shí)的振動(dòng)響應(yīng)作出理論預(yù)測(cè)。研究結(jié)論:(1)地鐵鄰近建筑的振動(dòng)主頻體現(xiàn)為結(jié)構(gòu)的自振頻率,且建筑低層存在地鐵激勵(lì)的中高頻反彈區(qū);(2)列車車速和單雙線運(yùn)行將顯著干預(yù)鄰近建筑的振動(dòng)響應(yīng)峰值,但對(duì)建筑的振動(dòng)形態(tài)無(wú)明顯影響;(3)多層建筑至隧道中心水平距離在5 m范圍內(nèi),小高層與高層建筑在10 m范圍內(nèi)或30~40 m的振動(dòng)放大區(qū)內(nèi),車速超過(guò)60 km/h時(shí),鄰近建筑全部或部分樓層振動(dòng)響應(yīng)可能超越相關(guān)振動(dòng)限值,需進(jìn)一步考慮減振控制;(4)該研究結(jié)論可為地質(zhì)條件相似地區(qū)的地鐵設(shè)計(jì)施工及未來(lái)的振動(dòng)控制提供理論和技術(shù)支持。
[Abstract]:Research purpose: a city subway is under construction. In order to obtain more reliable prediction accuracy of the influence of subway operation on the vibration of adjacent buildings, it is necessary to carry out specific research along the subway line with special geological conditions. In this paper, aiming at the soft class III site soil in this city, the vertical coupling vibration numerical model of subway train and track and the finite element model of tunnel soil building are established. Referring to the parameters of the city subway, the vibration response of the general building adjacent to the subway during subway operation is predicted theoretically. The conclusions are as follows: (1) the main vibration frequency of the adjacent subway building is the natural vibration frequency of the structure, and there is a middle and high frequency rebound area excited by the subway in the lower floor of the building. (2) the train speed and single and double lane operation will significantly interfere with the peak value of the vibration response of the adjacent building, but have no obvious effect on the vibration form of the building. (3) the horizontal distance from the multi-storey building to the center of the tunnel is in the range of 5 m, and the vibration control of the small high-rise building and the high-rise building is in the range of 10 m or 30 鈮，
本文編號(hào)：2507151
[Abstract]:Research purpose: a city subway is under construction. In order to obtain more reliable prediction accuracy of the influence of subway operation on the vibration of adjacent buildings, it is necessary to carry out specific research along the subway line with special geological conditions. In this paper, aiming at the soft class III site soil in this city, the vertical coupling vibration numerical model of subway train and track and the finite element model of tunnel soil building are established. Referring to the parameters of the city subway, the vibration response of the general building adjacent to the subway during subway operation is predicted theoretically. The conclusions are as follows: (1) the main vibration frequency of the adjacent subway building is the natural vibration frequency of the structure, and there is a middle and high frequency rebound area excited by the subway in the lower floor of the building. (2) the train speed and single and double lane operation will significantly interfere with the peak value of the vibration response of the adjacent building, but have no obvious effect on the vibration form of the building. (3) the horizontal distance from the multi-storey building to the center of the tunnel is in the range of 5 m, and the vibration control of the small high-rise building and the high-rise building is in the range of 10 m or 30 鈮，
本文編號(hào)：2507151
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