三维复合隔震墩研究

发布时间：2018-10-30 20:38

【摘要】：我国是地震高发国家,历年以来地震对人民的财产和生命安全有着巨大的威胁,随着防震技术的发展,结构已经不仅仅仅限于“硬抗”,近年来随着隔震理论的发展和运用,基础隔震技术已经得到更多人的关注和研究,有望成为今后结构抗震方向的主流。基于早期对地震波的认识,人们对大部分普通结构抗震仅仅考虑水平方向地震波的影响,普遍认为只有大跨度、高耸建筑,才需考虑竖向地震的影响,因此在隔震技术上大多数人基本只考虑了在水平方向进行隔震的方法,对于竖向隔震的研究相对缺失。然而,随着专家学者对地震的深入研究以及近年来的地震现象发现,竖向地震的影响对于结构是不容忽视的,国内外已经监测到一些地震记录显示在近震时竖向加速度往往达到甚至超过水平加速度,这充分说明隔震技术对竖向地震研究的必要性。本文针对国内外现有隔震装置在竖向隔震研究方向的空白,以基础隔震原理为依据,在钢筋沥青复合隔震层的基础上,开发了一种新型三维隔震装置—三维复合隔震墩,在减轻水平地震的同时也能有效进行竖向隔震,同时考虑我国村镇地区的特点,还有着造价低廉、构造简单等特点。本文首先介绍了三维复合隔震墩的基本隔震原理以及创新点,并将三维复合隔震墩结构特点、计算模型以及设计理论作为重点,阐述三维复合隔震墩的施工工艺和制作流程,最后进行振动台模拟试验,通过布置在上部结构以及振动台面上的拾振器测出振动台输入以及上部结构输出的加速度峰值,通过两者的比值来判断隔震效果。试验结果表明,无论是在水平方向或是竖向方向上,三维复合隔震墩均有较好的隔震效果,加速度有极大的衰减,为三维复合隔震墩的推广应用提供了充分了理论基础。
[Abstract]:China is a country with high incidence of earthquakes. Earthquake has a great threat to people's property and life safety in the past years. With the development of earthquake prevention technology, the structure has not only been limited to "hard resistance", but also with the development and application of isolation theory in recent years. The foundation isolation technology has been paid more attention and research, and it is expected to become the mainstream of seismic direction in the future. Based on the early understanding of seismic waves, people only consider the influence of horizontal seismic waves on the earthquake resistance of most common structures. It is generally believed that only large span and towering buildings need to consider the influence of vertical earthquakes. Therefore, in isolation technology, most people only consider the method of isolation in horizontal direction, and the research on vertical isolation is relatively missing. However, with the in-depth study of earthquakes by experts and scholars and the earthquake phenomena in recent years, it is found that the influence of vertical earthquakes on structures can not be ignored. Some seismic records at home and abroad show that the vertical acceleration usually reaches or even exceeds the horizontal acceleration in near earthquakes, which fully shows the necessity of seismic isolation technology for vertical seismic research. In this paper, aiming at the blank in the research direction of vertical isolation of the existing isolation devices at home and abroad, based on the principle of base isolation and on the basis of reinforced asphalt composite isolation layer, a new three-dimensional isolation device, three-dimensional composite isolation pier, is developed. At the same time, the horizontal earthquake can be reduced and the vertical isolation can be effectively carried out. At the same time, the characteristics of villages and towns in our country are considered, and the cost is low and the structure is simple and so on. In this paper, the basic isolation principle and innovation of 3D composite isolation pier are introduced, and the structural characteristics, calculation model and design theory of 3D composite isolation pier are taken as the emphases, and the construction technology and production flow of 3D composite isolation pier are expounded. Finally, the vibration table simulation test is carried out, and the peak acceleration of the input and output of the vibration table is measured by the vibration pick-up arranged on the upper structure and the vibration table surface, and the isolation effect is judged by the ratio of the two. The experimental results show that both horizontal and vertical direction, the three-dimensional composite isolation pier has better isolation effect, and the acceleration has great attenuation, which provides a sufficient theoretical basis for the popularization and application of three-dimensional composite isolation pier.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.12

【参考文献】