【摘要】：人行橋振動(dòng)問(wèn)題由來(lái)已久，但直到英國(guó)千禧橋發(fā)生的橋梁過(guò)度振動(dòng)事件，大量的研究才投入到人行橋的人致振動(dòng)及其舒適度標(biāo)準(zhǔn)上。隨著土木工程技術(shù)的發(fā)展，輕質(zhì)、大跨度、低阻尼比的橋梁結(jié)構(gòu)越來(lái)越多，這樣的新型橋梁方便了人民群眾的出行，也美化了城市景觀，但也正是人致振動(dòng)問(wèn)題最嚴(yán)重的橋梁結(jié)構(gòu)。目前，國(guó)內(nèi)外已經(jīng)形成了大量的科研成果，并在很多國(guó)家最新的人行橋設(shè)計(jì)規(guī)范得到了應(yīng)用，取得了顯著的社會(huì)和經(jīng)濟(jì)效益。隨著我國(guó)土木工程建設(shè)的發(fā)展，人行橋的建設(shè)日益增多，人行橋的人致振動(dòng)也成了我國(guó)橋梁建設(shè)中的一個(gè)重要問(wèn)題，需要認(rèn)真研究如何將已有的科學(xué)研究成果和外國(guó)規(guī)范的先進(jìn)經(jīng)驗(yàn)融入到我國(guó)人行橋設(shè)計(jì)中。目前國(guó)內(nèi)的研究大多集中在人行橋的人致振動(dòng)計(jì)算理論和套用國(guó)外規(guī)范的規(guī)定進(jìn)行計(jì)算方面，少有涉及人行橋人致振動(dòng)的實(shí)橋測(cè)試結(jié)果，難以了解這些理論和計(jì)算方法對(duì)于國(guó)內(nèi)人行橋的適用情況。因此，本文依托一座人行橋?qū)嵗瑢?duì)人行橋人致振動(dòng)的計(jì)算方法、人行橋人致振動(dòng)舒適性測(cè)試方法、人行橋人致振動(dòng)實(shí)測(cè)等進(jìn)行了研究，內(nèi)容主要如下： 1.使用ANSYS建立橋梁的有限元模型，通過(guò)多種方法計(jì)算橋梁的人致振動(dòng)響應(yīng)。并對(duì)不同方法的計(jì)算結(jié)果進(jìn)行對(duì)比。 2.通過(guò)單人和多人的人行橋行走試驗(yàn)，測(cè)試行人行走時(shí)橋梁的振動(dòng)響應(yīng)。與計(jì)算結(jié)果進(jìn)行對(duì)比，驗(yàn)證行走試驗(yàn)測(cè)試方法的實(shí)用性，同時(shí)評(píng)估不同加速度條件下的行人舒適度感受。 3.測(cè)試日常使用中橋梁的振動(dòng)響應(yīng)，與理論計(jì)算的結(jié)果進(jìn)行對(duì)比。評(píng)估理論計(jì)算方法的適用性。
[Abstract]:The vibration problem of pedestrian bridge has a long history, but it is not until the excessive vibration of bridge occurred at Millennium Bridge in England that a great deal of research has been devoted to the standard of human induced vibration and its comfort degree of pedestrian bridge. With the development of civil engineering technology, there are more and more bridges with light weight, large span and low damping ratio. This new type of bridge facilitates the travel of the people and beautifies the urban landscape. But it is also the most serious problem of the bridge structure caused by human vibration. At present, a large number of scientific research achievements have been formed at home and abroad, and have been applied in many countries in the latest pedestrian bridge design code, and achieved remarkable social and economic benefits. With the development of civil engineering construction in our country, the construction of pedestrian bridge is increasing day by day. It is necessary to carefully study how to integrate the existing scientific research results and the advanced experience of foreign norms into the design of pedestrian bridges in China. At present, most of the domestic researches are focused on the calculation theory of artificial vibration of footbridge and the application of the rules of foreign codes for calculation. There are few real bridge test results related to the man-made vibration of footbridge. It is difficult to understand the applicability of these theories and calculation methods to domestic footbridges. Therefore, based on an example of a pedestrian bridge, this paper studies the calculation method of the human-induced vibration of the footbridge, the testing method of the human-induced vibration comfortableness of the footbridge, the measurement of the human-induced vibration of the footbridge, and so on. The main contents are as follows: 1. The finite element model of the bridge is established by using ANSYS, and the human vibration response of the bridge is calculated by a variety of methods. The calculation results of different methods are compared. 2. The vibration response of the bridge was tested by walking test of single and multi-person footbridge. Compared with the calculated results, the practicability of the walking test method is verified, and the pedestrian comfort feeling under different acceleration conditions is evaluated at the same time. 3. The vibration response of the bridge in daily use is tested and compared with the theoretical results. To evaluate the applicability of the theoretical calculation method.
【學(xué)位授予單位】：北京市市政工程研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.11

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本文編號(hào)：2312386