利用电磁引力和斥力原理的桥梁隔震

IF 0.1 Q4 ENGINEERING, CIVIL Romanian Journal of Transport Infrastructure Pub Date : 2017-07-01 DOI:10.1515/rjti-2017-0050
Silviu Alexandru Constantinescu, I. Răcănel
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引用次数: 0

摘要

摘要本文提出了一种新型的隔振器,它利用电磁吸引和排斥原理来控制地震中两个电磁铁之间的摩擦力。两个电磁铁与二次高摩擦耗散和阻尼机构结合使用,二次高摩擦力耗散和阻尼机制由10mm厚的氯丁橡胶环层和两个涂有Si3N4的钢表面组成,用于在某些最大地面加速度下耗散桥面中的动能。隔离器采用嵌入支座中的三轴加速度计、大电流可充电电池和自动控制单元。所提出的隔离器是专门为跨度36米的混凝土桥面开发的,采用时程电磁和结构分析,在两个桥台上进行简单支撑。本文介绍了与经典被动装置相比,使用这种主动隔震系统的优点,以及在降低下部结构元件截面上的内力以及降低两个电磁铁之间的相对位移方面取得的重要成果。
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Seismic Isolation of Bridges Using the Principle of Electromagnetic Attraction and Repulsion
Abstract This paper presents a new type of seismic isolator that uses the principle of electromagnetic attraction and repulsion, to control the friction force between two electromagnets during earthquakes. The two electromagnets are used in conjunction with a secondary high friction dissipating and damping mechanism composed from a 10mm thick neoprene ring layer and two steel surfaces coated with Si3N4 that are used to dissipate the kinetic energy in the bridge deck at some maximum ground accelerations. The isolator utilizes tri-axial accelerometers embedded in the abutments, high current rechargeable batteries and an automated controlling unit. The presented isolator was developed specifically for a concrete bridge deck with a span of 36 meters and simple supported on two abutments, using time history electromagnetic and structural analyses. The paper presents the advantages of using this active seismic isolation system, compared to classical passive devices and the important results obtained in terms of decreasing internal forces on the substructure elements cross sections together with the reduction of relative displacements between the two electromagnets.
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审稿时长
10 weeks
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