交通激励下古建筑木结构速度响应取值方法的研究

发布时间：2018-01-07 15:33

本文关键词：交通激励下古建筑木结构速度响应取值方法的研究　出处：《聊城大学》2017年硕士论文　论文类型：学位论文

【摘要】：作为中华文明的重要组成部分之一,中国古建筑不仅仅是重要的文物,同时也在建筑艺术史上留下浓墨重彩的一笔,具有极高的文物、历史、艺术和科学价值。如今除了风雪侵蚀、地震及维修不善等多方面的因素导致古建筑在不同程度上受到损害,地面交通振动也成为了古建筑的“隐形杀手”。虽然目前的评估标准是以质点的速度或者加速度来评判,有关其量的确定方法却有诸多的不同。本文以国家重点文物保护单位——聊城光岳楼研究对象,对光岳楼进行实地振动监测,根据现场测试的振动数据,并结合相关概率统计的知识得出符合交通振动实际情况的光岳楼木结构速度响应取值方法。主要研究内容如下:(1)对交通激励作用下的光岳楼进行实地监测;利用Matlab软件对采集的数据进行去直流、滤波、平滑及消除趋势项的处理以便得到更符合实际情况的数据。同时,分析对比了光岳楼上部木结构各层柱顶的振动情况。(2)通过分析测试数据,依据随着振动时域理论,对相关测点的速度幅值运用统计学方法分析,可知其近似服从正态分布,采用概率统计的知识可以得出置信度为95%的速度幅值统计方法,对比与实测数据之间的误差,进而得出可以更好的反应交通振动特点的速度取值方法。(3)依据《古建筑防工业振动技术规范》得出光岳楼顶层柱顶水平振动速度的容许值,再根据规范中对相关规定分别得出实测数据下的顶层柱顶速度以及95%置信度的幅值统计数据下的顶层柱顶速度。对光岳楼进行实测结果安全评估后发现,无论是实测数据还是95%置信度的幅值统计数据其结果都大于规范规定的容许值,即在此次测试中光岳楼处于不安全的状态。
[Abstract]:As one of the important parts of Chinese civilization, Chinese ancient architecture is not only an important cultural relic, but also a very high historical relic in the history of architectural art. Art and scientific value. Today, apart from snow erosion, earthquakes and poor maintenance, many factors cause damage to ancient buildings to varying degrees. Ground traffic vibration has also become the "invisible killer" of ancient buildings, although the current assessment criteria are based on the speed or acceleration of particles. However, there are many differences in the method of determining its quantity. This paper takes the research object of Liaocheng Guangyue Tower, a national key cultural relic protection unit, to carry on the field vibration monitoring to the optical tower, and according to the vibration data of the field test. Combined with the knowledge of correlation probability and statistics, the method of choosing the velocity response of the wooden structure of the light-light building in accordance with the actual situation of traffic vibration is obtained. The main research contents are as follows: 1). Carry on the field monitoring to the light tower under the action of the traffic incentive; The Matlab software is used to dedirect, filter, smooth and eliminate the trend terms of the collected data in order to get more practical data. At the same time. Through the analysis of the test data, according to the time-domain theory of vibration, the velocity amplitude of the related measuring points is analyzed by statistical method. It is known that its approximate from the normal distribution, using the knowledge of probability and statistics can be obtained confidence degree of 95% speed amplitude statistical method, compared with the error between the measured data. And then get a better response to the characteristics of traffic vibration velocity value method. 3) according to the "ancient building anti-industrial vibration technical specification" to get the top of the light building horizontal vibration velocity of the horizontal value. According to the relevant regulations in the code, the top cylinder top velocity under the measured data and the top cylinder top velocity under the statistical data of 95% confidence degree are obtained respectively. The safety assessment of the measured results of the optical tower is found. Both the measured data and the statistical data of the amplitude of 95% confidence degree are larger than the allowable values stipulated in the specification, that is, the light tower is in an unsafe state in this test.
【学位授予单位】：聊城大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU-87

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