本文選題：大跨樓蓋結(jié)構(gòu) + 步行特征參數(shù)��； 參考：《東南大學(xué)》2015年碩士論文

【摘要】：隨著大跨樓蓋結(jié)構(gòu)建設(shè)量的日益增多,超過人體舒適度限值要求的工程案例時(shí)有發(fā)生,此類結(jié)構(gòu)越來越引起人們的關(guān)注。目前對(duì)于這類大跨樓蓋結(jié)構(gòu)的振動(dòng)響應(yīng)規(guī)律研究工作開展較少,工程設(shè)計(jì)實(shí)踐尚缺乏理論的指導(dǎo),特別是在人群荷載激勵(lì)下的振動(dòng)響應(yīng)和控制研究還尚未完善,主要集中表現(xiàn)在對(duì)人群步行規(guī)律的不確定性上,因此建立合理的人行荷載荷載模型對(duì)于大跨樓蓋結(jié)構(gòu)的合理設(shè)計(jì)與正常使用具有重要的理論意義和工程實(shí)踐意義。本文以高鐵站房大跨樓蓋結(jié)構(gòu)人群為主要研究對(duì)象,主要研究工作和成果如下：1,人群步行特征參數(shù)的統(tǒng)計(jì)分析。本文利用MATLAB視頻分析程序?qū)δ暇┠险�、上海虹橋站、北京南站、武漢站和廣州南站候車大廳內(nèi)的人群步行特征參數(shù)進(jìn)行了統(tǒng)計(jì)分析,得到了這五大高鐵站房人群步行特征參數(shù)的分布規(guī)律；統(tǒng)計(jì)得出總體人群自由行走時(shí)步頻服從f～N(1.8811,0.17662)的正態(tài)分布,相位角服從φ～U(0,2π)之間的均勻分布：同時(shí)對(duì)影響人群行走的因素進(jìn)行了統(tǒng)計(jì)分析,利用隨機(jī)概率分布的方法統(tǒng)計(jì)得出進(jìn)站大廳人群步行同步調(diào)概率服p～N(0.2516,0.06722)的正態(tài)分布,候車大廳人群步行同步調(diào)概率服從p～N(0.1880,0.05712)的正態(tài)分布；最后利用不同人群密度之間的統(tǒng)計(jì)參數(shù),擬合得到了人群步行特征參數(shù)與人群密度之間的關(guān)系。2.隨機(jī)人群荷載的模擬�；诮y(tǒng)計(jì)得到的步行特征參數(shù),參考IABSE建議的單人步行荷載模型,利用MATLAB自編程序生成了隨機(jī)人群步行荷載時(shí)程曲線。3.對(duì)閔行博物館大跨懸挑樓蓋結(jié)構(gòu)進(jìn)行了振動(dòng)響應(yīng)分析及計(jì)算,得到了在確定性荷載、隨機(jī)荷載和同步調(diào)概率三種情況下懸挑樓蓋結(jié)構(gòu)的人致振動(dòng)響應(yīng),并對(duì)三者的計(jì)算結(jié)果進(jìn)行對(duì)比分析,分析表明了本文所提隨機(jī)人群荷載模擬方法的合理性以及人群步行同步調(diào)概率統(tǒng)計(jì)的準(zhǔn)確性。4.進(jìn)行了大跨樓蓋結(jié)構(gòu)的現(xiàn)場(chǎng)測(cè)試及理論分析。以閔行區(qū)生態(tài)博物館大跨懸挑樓蓋為工程背景,進(jìn)行了現(xiàn)場(chǎng)動(dòng)力特性測(cè)試、減振前后人群步行荷載激勵(lì)下的振動(dòng)響應(yīng)測(cè)試；同時(shí)采用與現(xiàn)場(chǎng)測(cè)試時(shí)相同的荷載工況進(jìn)行了人致振動(dòng)的有限元計(jì)算分析,計(jì)算結(jié)果與現(xiàn)場(chǎng)測(cè)試結(jié)果基本吻合,為后續(xù)計(jì)算分析奠定了基礎(chǔ)。5.對(duì)大跨樓蓋結(jié)構(gòu)進(jìn)行了振動(dòng)響應(yīng)控制�，F(xiàn)場(chǎng)測(cè)試與理論計(jì)算表明,閔行區(qū)生態(tài)博物館大跨懸挑樓蓋結(jié)構(gòu)在人群行走激勵(lì)下的加速度響應(yīng)峰值超過了規(guī)范限值,應(yīng)進(jìn)行振動(dòng)控制。通過優(yōu)化計(jì)算,決定采用6套TMD-黏滯流體阻尼器消能減振系統(tǒng)對(duì)結(jié)構(gòu)豎向振動(dòng)響應(yīng)進(jìn)行控制,理論計(jì)算與實(shí)測(cè)結(jié)果都表明振動(dòng)控制效果非常明顯。
[Abstract]:With the increasing amount of construction of long-span floor structure, the engineering cases which exceed the limit of human comfort occur from time to time, and more people pay attention to this kind of structure. At present, there are few researches on the vibration response law of this kind of long-span floor structure, and the engineering design practice is still lack of theoretical guidance, especially the research on vibration response and control under crowd load is not perfect. The main focus is on the uncertainty of the walking law of the crowd, so it is of great theoretical and engineering significance to establish a reasonable pedestrian load model for the rational design and normal use of the long-span floor structure. This paper takes the large span floor structure of high-speed railway station as the main research object. The main research work and results are as follows: 1. Statistical analysis of the walking characteristic parameters of the crowd. In this paper, the characteristic parameters of walking in the waiting halls of Nanjing South Station, Shanghai Hongqiao Station, Beijing South Station, Wuhan Station and Guangzhou South Station are analyzed by MATLAB video analysis program. The distribution law of the walking characteristic parameters of the five high-speed railway stations is obtained, and the normal distribution of the walking characteristics of the whole population is obtained from fen Nu 1.8811 ~ 0.17662). The uniform distribution of phase angle suit from 蠁 ~ (2 蟺): at the same time, the factors affecting the walking of people were statistically analyzed, and the normal distribution of synchronously adjusting probability of walking in the lobby was obtained by using the method of random probability distribution. The normal distribution of the synchronous adjustment probabilistic clothing of the waiting hall was obtained from pHN 0.1880 0. 05712). Finally, the relationship between the walking characteristic parameters and the population density was obtained by using the statistical parameters of different population densities, and the relationship between the walking characteristic parameters and the population density was obtained. Simulation of random crowd loads. Based on the characteristic parameters of walking, and referring to the single person walking load model suggested by IABSE, the time-history curve of walking load of random population is generated by MATLAB program. The vibration response of the long-span cantilevered floor structure of Minhang Museum is analyzed and calculated, and the human-induced vibration response of the cantilever floor structure under deterministic load, random load and synchronous adjustment probability is obtained. The results show that the method proposed in this paper is reasonable and accurate. Field test and theoretical analysis of long span floor structure are carried out. Taking the long-span cantilevered floor of Minhang Ecological Museum as the engineering background, the field dynamic characteristics were tested, and the vibration response of the crowd under the excitation of walking load before and after the vibration reduction was tested. At the same time, the finite element analysis of human-induced vibration is carried out under the same load condition as in the field test. The calculated results are in good agreement with the field test results, which lays a foundation for the subsequent calculation and analysis. The vibration response of long span floor structure is controlled. The field test and theoretical calculation show that the acceleration response peak of the long-span cantilevered floor structure of Minhang Eco-Museum under the excitation of the crowd walking exceeds the standard limit, so vibration control should be carried out. Through optimization calculation, it is decided to adopt six sets of TMD-viscous fluid damper energy dissipation system to control the vertical vibration response of the structure. The theoretical calculation and the measured results show that the vibration control effect is very obvious.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU311.3

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本文編號(hào)：2007869