通过振动台试验对带有单向抗震支座系统(Uni-RIBS)的桥梁模型进行试验研究

IF 4.3 2区 工程技术 Q1 ENGINEERING, CIVIL
Xinhao He, Yoshihiro Tajiri, Shigeki Unjoh, Shinsuke Yamazaki, Tadayuki Noro
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引用次数: 0

摘要

本研究介绍了在振动台上使用新提出的单向抗震支座系统(简称 Uni-RIBS)的按比例桥梁模型的实验结果。该桥梁模型具有一个上部结构梁和四个支座。实验输入包括各种记录的、设计的和谐波的地面运动,其特点是峰值加速度不同,有或没有垂直分量和时间刻度属性。上部结构大梁的质量在两种条件下(全质量和半质量)发生了变化。测试结果验证了 Uni-RIBS 固有的摇摆机制,并证明了分析模型在预测系统动态方面的准确性,包括其负刚度、质量无关性和支座旋转反转时的能量耗散特性。此外,本研究还检验了不同复杂程度的简化数值模型在预测桥梁模型地震响应方面的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Experimental study of a scaled bridge model with a unidirectional rocking isolation bearing system (Uni-RIBS) through shaking table tests

Experimental study of a scaled bridge model with a unidirectional rocking isolation bearing system (Uni-RIBS) through shaking table tests

This study presents the experimental results on a scaled bridge model with a newly proposed unidirectional rocking isolation bearing system (referred to as Uni-RIBS) on a shaking table. The bridge model features one superstructure girder and four bearings. The experimental input encompassed a variety of recorded, design, and harmonic ground motions, characterized by differing peak accelerations, with or without vertical components, and time-scaled attributes. The superstructure girder's mass was altered for two conditions (full and half). The test results validate the rocking mechanism inherent in the Uni-RIBS and demonstrate the analytical model's accuracy in predicting the system's dynamics, including its negative stiffness, mass-independent, and energy dissipation characteristics during bearing rotation reversals. Additionally, this study examines the effectiveness of a simplified numerical model in varying complexities for predicting the seismic responses of the bridge model.

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来源期刊
Earthquake Engineering & Structural Dynamics
Earthquake Engineering & Structural Dynamics 工程技术-工程:地质
CiteScore
7.20
自引率
13.30%
发文量
180
审稿时长
4.8 months
期刊介绍: Earthquake Engineering and Structural Dynamics provides a forum for the publication of papers on several aspects of engineering related to earthquakes. The problems in this field, and their solutions, are international in character and require knowledge of several traditional disciplines; the Journal will reflect this. Papers that may be relevant but do not emphasize earthquake engineering and related structural dynamics are not suitable for the Journal. Relevant topics include the following: ground motions for analysis and design geotechnical earthquake engineering probabilistic and deterministic methods of dynamic analysis experimental behaviour of structures seismic protective systems system identification risk assessment seismic code requirements methods for earthquake-resistant design and retrofit of structures.
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