不同粒径比砂与橡胶粒隔震垫层振动台试验研究

发布时间：2018-04-20 19:29

本文选题：结构隔震 + 振动台试验　；参考：《安徽理工大学》2017年硕士论文

【摘要】：地震是地球内部的一种剧烈运动。地震带来的危害在广大的农村尤为严重。随着经济的发展,在全世界研究新的隔震技术的学者越来越多。隔震技术和传统抗震技术相比较具有更多有利之处:隔震方法的种类多、结构安全性显著增强、减震效果更明显等。在未来的时间里,需要加大对隔震技术的普及。砂和橡胶粒垫层隔震技术主要是在结构与基础之间或者在楼层之间设置一层混合垫层作为缓冲层。使得建筑物的自振周期和阻尼增大,避开场地卓越周期。隔震层通过阻尼能、滞回能以及弹性能来消耗地震能,从而控制地震的能量传入上部构筑物中。使得居住的房屋安全性得到提高。并且砂和橡胶粒隔震技术的成本低,施工方便,符合农村实际情况。本文中对隔震减震技术的现状和原理进行详细阐述。主要研究不同粒径之比的砂与橡胶粒隔震垫层技术。利用相似理论计算方法对模型制作中常用的物理量在满配和欠配重条件下的相似关系进行推导。通过相似原理对本振动台试验中的原型进行模型的配重和配筋计算。以砂与橡胶粒隔震垫层为研究对象,完成了 1:8框架模型设计和制作。筛选不同粒径的白石英砂和橡胶粒。在振动台模拟试验中,输入不同加速度峰值的EI-Centro波。来研究砂与橡胶粒隔震垫层在不同粒径比情况下的减震效果。通过加速度的反应来研究混合隔震垫层的减震效果。在本试验中初步表明:随着粒径之比增大,框架模型上部结构加速度响应呈现减小趋势。但并不是粒径之比越大越好,当石英砂与橡胶粒的粒径之比在1～1.5之间隔震垫层减震效果较好。
[Abstract]:Earthquakes are a violent movement in the interior of the earth. The damage caused by the earthquake is especially serious in the vast rural areas. With the development of economy, more and more scholars study new isolation technology all over the world. Compared with the traditional seismic technique, the isolation technique has more advantages, such as the variety of isolation methods, the safety of the structure and the effect of seismic absorption. In the future, the need to increase the spread of isolation technology. The isolation technology of sand and rubber cushion is to install a mixed cushion between structure and foundation or between floors as buffer layer. The natural vibration period and damping of the building are increased to avoid the outstanding period of the site. The seismic energy is consumed by damping energy, hysteretic energy and elastic energy in the isolation layer, and the energy of the earthquake is controlled into the upper structure. So that the housing security has been improved. And sand and rubber particle isolation technology is low cost, easy construction, in line with the actual situation in rural areas. In this paper, the current situation and principle of isolation and damping technology are described in detail. The technology of isolating cushion with sand and rubber particles with different particle size ratio is studied. The similarity relations of physical quantities commonly used in model making under the condition of full and underweight are deduced by using the method of similarity theory. The model weight and reinforcement of the prototype in the shaking table test are calculated by similarity principle. The 1:8 frame model was designed and made by taking the sand and rubber particle isolation cushion as the research object. Screen white quartz sand and rubber particles with different sizes. In the shaking table simulation test, EI-Centro waves with different acceleration peaks are input. To study the shock absorption effect of sand and rubber isolation cushion with different particle size ratio. The damping effect of mixed isolation cushion is studied by the response of acceleration. The experimental results show that the acceleration response of the superstructure decreases with the increase of the particle size ratio. However, the bigger the particle size ratio is, the better the damping effect is when the particle size ratio of quartz sand to rubber particle is between 1 and 1.5.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.12

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