地铁振动实测及结构与桩土响应规律研究

发布时间：2018-10-25 16:21

【摘要】：随着城市化进程的加快以及城市交通网密度的不断增加,交通系统带来的环境振动和噪声问题日益显现。在城市交通系统问题层出不穷的同时,地铁交通系统可以输送大量的客流,同时具备准时、快速、高效、卫生的特点,但是地铁交通带来的振动副作用问题也越演越烈,严重影响人们的日常生活与工作。我国地铁交通系统的发展呈现出“先有建筑,后有地铁”的趋势。城市内部高楼林立,立体交通纵横交错,地铁运行时间每天从上午6点开始直到晚上11点左右停止,有的甚至更长时间,产生的振动和噪声对环境影响持续时间长达17小时以上。地铁列车引起的环境振动问题愈发地引起了民众的关注,其振动传播规律研究也成为现今研究的热点。基于上述原因,本文将从如下角度开展研究工作：第一章、概述了地铁振动的研究意义并归纳总结了现今国内外地铁振动在现场实测、有限元模拟、考虑土结动力相互作用的研究概况,基于以上研究提出有待进一步分析的问题及本文的研究方向。第二章、对广州地铁一号线地面振动——坑口至花地湾路段,进行地表振动实测。测线分为两条,分别测量不同距离处振动的时程；从时域、频域以及1/3倍频分频角度分析振动的传播规律及是否对人们生活与工作造成影响。第三章、根据实际工程图纸,利用有限元软件MIDAS/GEN建立建筑的三维有限元模型,以实测数据为激励输入,分析振动在各层楼板、梁柱中的传播规律,在构件层次上分析振动是否超限以及提出如何在构件层次上做好减隔震的建议。第四章、通过对实际工程数据的收集,建立道床-土层-桩基-上部建筑的MIDAS/GTS/NX三维有限元模型,选用合理的已有研究地铁振动振源模型和参数获得与本文相似的振源输入,分析有无桩基础、有桩基在协调接触、非线性接触作用下建筑物的振动响应规律及其对比分析,为后续研究者建立动力土结相互作用模型研究地铁振动传播规律提供参考。
[Abstract]:With the acceleration of urbanization and the increasing density of urban traffic network, the environmental vibration and noise caused by traffic system are becoming more and more obvious. While the problems of the urban transportation system emerge in endlessly, the subway traffic system can transport a large number of passengers, and it has the characteristics of punctuality, rapidity, efficiency and hygiene. However, the vibration side effects brought by the subway traffic are becoming more and more serious. Seriously affect people's daily life and work. The development of subway transportation system in our country shows the trend of "building first, subway later". The city's interior is full of tall buildings, three-dimensional traffic crisscrossing, and the subway runs from 6 a.m. to about 11:00 every day, some even longer. The impact of vibration and noise on the environment lasts for more than 17 hours. The environmental vibration caused by subway trains has attracted more and more attention, and the study of its vibration propagation law has become a hot topic. For the above reasons, this paper will carry out the research work from the following angles: chapter 1, summarizes the research significance of subway vibration and summarizes the field measurement and finite element simulation of subway vibration at home and abroad. Considering the general situation of soil dynamic interaction, based on the above research, the problems that need to be further analyzed and the research direction of this paper are put forward. In the second chapter, the ground vibration from Hang Hou to Huadi Bay of Guangzhou Metro Line 1 is measured. The measuring lines are divided into two sections, which measure the time history of vibration at different distances, and analyze the propagation law of vibration and whether it will affect people's life and work from time domain, frequency domain and 1 / 3 frequency division angle. In the third chapter, according to the actual engineering drawings, using the finite element software MIDAS/GEN to establish the three-dimensional finite element model of the building, taking the measured data as the excitation input, the propagation law of the vibration in each floor slab and Liang Zhu is analyzed. This paper analyzes whether the vibration is beyond the limit at the component level and puts forward some suggestions on how to reduce the vibration isolation at the component level. In the fourth chapter, through the collection of practical engineering data, the MIDAS/GTS/NX three-dimensional finite element model of roadbed, soil layer, pile foundation and upper building is established, and the reasonable vibration source model and parameters of existing research subway are selected to obtain the vibration source input similar to this paper. This paper analyzes the vibration response law of buildings under the action of coordinated contact and nonlinear contact with or without pile foundation, and provides a reference for further researchers to establish dynamic soil-junction interaction model to study the vibration propagation law of subway.
【学位授予单位】：广东工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U211.3;TU435

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