Abstract
The shaking table model test mainly focuses on the study of seismic response law, aseismic performance and seismic damping and isolation effect of bridges with a single or multi-platform shaking table. Basically, the plane principal axis direction is adopted for the seismic input of structural models. Little research effort considering multi-angle seismic input has been reported in the structural model test. In this paper we designed and conducted a small-scale shaking table model test to study the seismic response law of the curved girder bridges with seismic input at different angles, and provided experimental verification for the theoretical method of the most unfavorable angle of seismic input. The experimental results show that the variation trend of component response to variation of the seismic input direction is consistent with that of the numerical analysis, which indicates that the designed device is effective.
Highlights
Shaking table simulation is one of the important means to study the dynamic response of bridge structures
The sliding phenomenon of plate rubber bearing subjected to earthquake was studied by experiment on a single-dimensional shaking table by Wang Kairui and Xu Xiuli (2017) [9] et al Xiang Nailiang and Li Jianzhong (2018) [10] carried out a series of research on the EXPERIMENTAL DETERMINATION ON THE CRITICAL ANGLE OF SEISMIC INCIDENCE OF CURVED BRIDGE
Rigid base shall be designed to ensure the reliable connection between the model and the shaking table, enabling the seismic wave to transfer into the structure effectively. The purpose of this experiment is to verify the critical angle of seismic incidence by exploring the seismic response of curved girder bridge with multi-direction input
Summary
Shaking table simulation is one of the important means to study the dynamic response of bridge structures. Liu Yanhui and Tan Ping et al (2015) [5] used a three-way six-degree-of-freedom shaking table to study the anti-seismic and damping performance of the with high pier isolated continuous beam bridge. Using a single dimensional shaking table, Wen Jianian and Li Hongying et al (2016) [6] studied the response characteristics and isolation effect of three kinds of isolation bridges with single spherical friction pendulum bearing, double concave friction pendulum bearing and multi-spherical sliding friction bearing. He Lixiang and Ren Weixin et al (2016) [7] used two shaking tables with three-way six-degreeof-freedom to investigate the impact response of adjacent bridge structures under multi-dimensional multi-point earthquake. This paper designs and conducts a small-scale shaking table model test to study the seismic response rule of curved girder bridge with seismic input at different angles
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