本文關(guān)鍵詞：人行激勵下大跨度樓蓋結(jié)構(gòu)舒適度分析和振動控制　出處：《青島理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 大跨度樓蓋 人行激勵模型 TMD阻尼器 舒適度評價標準 振動控制

【摘要】：隨著經(jīng)濟的快速發(fā)展,城市建設(shè)的步伐越來越快,一些大跨度建筑結(jié)構(gòu)不斷出現(xiàn),例如大型體育場館,人行天橋等。大跨度結(jié)構(gòu)的質(zhì)量輕、剛度大、自振頻率小,在人行激勵作用下的振動問題漸漸受到人們的重視,當(dāng)外部激勵頻率與結(jié)構(gòu)自振頻率相近時容易激發(fā)共振。將TMD裝置應(yīng)用到結(jié)構(gòu)中來減小振動效應(yīng)是恰當(dāng)好處的辦法。本文以某體育場為研究對象,研究大跨度樓蓋結(jié)構(gòu)在人行激勵作用下的豎向振動舒適度和振動控制問題,主要的工作如下： 1.總結(jié)對比前人對人行激勵模型和相應(yīng)舒適度的研究成果,選取最適合本工程實際情況的人行走、跑步、跳躍激勵模型和舒適度評價標準。 2.將人行、跑步、跳躍激勵模型施加在樓蓋結(jié)構(gòu)上計算結(jié)構(gòu)動力效應(yīng),和相應(yīng)舒適度標準進行對比。 3.對樓蓋結(jié)構(gòu)施加TMD阻尼器,以位移和加速度作為對比對象,通過不斷優(yōu)化TMD的阻尼、剛度參數(shù)控制減振效果；改變TMD的布置方案計算最優(yōu)減振效果。對比施加TMD前后結(jié)構(gòu)的振動情況,證明安裝TMD之后樓蓋的減振效果滿足舒適度的要求。
[Abstract]:With the rapid development of economy, the pace of urban construction is getting faster and faster, and some long-span building structures appear constantly, such as large stadiums, footbridges and so on. Since the natural vibration frequency is small, people pay more and more attention to the vibration problem under the action of pedestrian excitation. It is easy to excite resonance when the external excitation frequency is close to the natural frequency of the structure. It is an appropriate method to reduce the vibration effect by applying the TMD device to the structure. In this paper, a stadium is taken as the research object. The problems of vertical vibration comfort and vibration control of long-span floor structure under pedestrian excitation are studied. The main work is as follows: 1. To summarize and compare the previous research results of pedestrian incentive model and corresponding comfort degree, select the most suitable for the actual situation of the project people walking, running, jumping incentive model and comfort evaluation criteria. 2. The excitation model of pedestrian, running and jumping is applied to the floor structure to calculate the dynamic effect of the structure, and the corresponding comfort criterion is compared. 3. Apply TMD damper to floor structure, take displacement and acceleration as the contrast object, through continuously optimize the damping of TMD, the stiffness parameter controls the damping effect; By changing the layout of TMD to calculate the optimal damping effect, comparing the vibration of the structure before and after the application of TMD, it is proved that the damping effect of floor after installing TMD meets the requirement of comfort.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU311.3;TU352.1

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本文編號：1389876