本文選題：元胞自動(dòng)機(jī) + 行人流��； 參考：《昆明理工大學(xué)》2014年碩士論文

【摘要】：人群動(dòng)荷載是大跨度人行橋、大跨度樓板及大型建筑物的連廊與過道等結(jié)構(gòu)振動(dòng)的主要原因。目前,單人行人荷載的研究已經(jīng)相當(dāng)成熟,眾多學(xué)者對(duì)行人動(dòng)荷載進(jìn)行了大量的測(cè)試并在此基礎(chǔ)上構(gòu)建了多種步行力荷載模型。對(duì)于人群研究,由于存在行人與行人之間的相互作用以及行人與結(jié)構(gòu)之間的相互影響問題,一直都是研究的難點(diǎn)和重點(diǎn)。到目前為止,建立的人群荷載模型還比較少。因此,本文利用行人流仿真模擬結(jié)合單人動(dòng)荷載模型,在考慮了行人之間、行人與結(jié)構(gòu)之間的相互作用的基礎(chǔ)上,對(duì)六種不同行人流比例關(guān)系在不同人群密度下,結(jié)構(gòu)所承受的豎向動(dòng)荷載和橫向動(dòng)荷載進(jìn)行分析研究。主要的研究方法和成果如下： 1)建立了基于元胞自動(dòng)機(jī)的行人流動(dòng)態(tài)仿真模型,模型在充分考慮行人微觀特征的基礎(chǔ)上,以對(duì)向行人流為仿真對(duì)象,分析研究了行人流速度-密度、流量-密度的曲線關(guān)系,并與其他研究者的視頻觀測(cè)結(jié)果進(jìn)行了對(duì)比分析,證明了仿真模型在仿真行人流行為特征方面具有一定可靠性。并分析研究了對(duì)行人流仿真模型中,多種不同移動(dòng)方式、不同移動(dòng)軌跡行人分別占行人總數(shù)的比例。 2)基于仿真模型中行人的不同移動(dòng)方式,結(jié)合單人動(dòng)荷載模型,研究了作用于結(jié)構(gòu)上人群豎向、橫向動(dòng)荷載。單人動(dòng)荷載模型是在充分考慮了行人步行參數(shù)統(tǒng)計(jì)特征的基礎(chǔ)上建立起來(lái)的概率性模型。行人在行走過程中,由于受到其他行人和周圍環(huán)境的影響,行人步頻和相位都表現(xiàn)出不同程度的同步現(xiàn)象,因此,對(duì)行人步頻和相位的同步調(diào)概率需要按照不同人群密度分別取值。 本論文利用計(jì)算機(jī)仿真模擬求解人群荷載的方法,為實(shí)際工程中結(jié)構(gòu)的人致振動(dòng)荷載研究提供了一種新的思路,在對(duì)人群荷載的基礎(chǔ)研究和考慮人群荷載的結(jié)構(gòu)設(shè)計(jì)方面具有一定的理論和工程意義。 本論文屬于國(guó)家自然科學(xué)基金項(xiàng)目(編號(hào)：51168021)的組成部分。
[Abstract]:Crowd dynamic load is the main reason of vibration of long span footbridge, long span floor slab and corridor of large building. At present, the research of single pedestrian load has been quite mature. Many scholars have carried out a lot of tests on pedestrian dynamic load and constructed a variety of walking force load models on this basis. Because of the interaction between pedestrian and structure, the study of crowd is always difficult and important. Up to now, few crowd load models have been established. Therefore, based on the simulation of pedestrian flow and the dynamic load model of single person, taking into account the interaction between pedestrian and structure, the paper studies the relationship between six different pedestrian flows under different population density. The vertical dynamic load and transverse dynamic load on the structure are analyzed and studied. The main research methods and results are as follows: 1) the simulation model of pedestrian flow based on cellular automata is established. The relationship between the velocity density and flow density curves of pedestrian flow is analyzed and compared with the video observation results of other researchers. It is proved that the simulation model is reliable in simulating the characteristics of pedestrian flow behavior. The paper also analyzes and studies the proportion of pedestrians with different moving modes and different trajectory in the pedestrian flow simulation model. 2) based on the different moving modes of pedestrians in the simulation model, combined with the single person dynamic load model, The vertical and transverse dynamic loads acting on the structure are studied. The single person dynamic load model is a probabilistic model based on the full consideration of the statistical characteristics of pedestrian walking parameters. In the course of walking, due to the influence of other pedestrians and the surrounding environment, the pedestrian walking frequency and phase show different degrees of synchronization, so, The synchronization probability of pedestrian step frequency and phase should be determined according to different population density. In this paper, the computer simulation method is used to solve the crowd load, which provides a new way of thinking for the study of the human vibration load of the structure in the actual engineering. It has certain theoretical and engineering significance in the basic research of crowd load and the structural design considering crowd load. This thesis belongs to the project of National Natural Science Foundation (No.: 51168021).
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU312.1

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本文編號(hào)：2058717