基墩高度对强震动记录的影响及应用研究

周宝峰; 宋泉; 任叶飞; 温瑞智; 陈相兆

doi:10.3799/dqkx.2023.149

Volume 49 Issue 2

Feb. 2024

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Zhou Baofeng, Song Quan, Ren Yefei, Wen Ruizhi, Chen Xiangzhao, 2024. The Study on the Influence and Application of Foundation Pier Height on Strong Motion Records. Earth Science, 49(2): 414-424. doi: 10.3799/dqkx.2023.149

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Zhou Baofeng, Song Quan, Ren Yefei, Wen Ruizhi, Chen Xiangzhao, 2024. The Study on the Influence and Application of Foundation Pier Height on Strong Motion Records. Earth Science, 49(2): 414-424. doi: 10.3799/dqkx.2023.149

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The Study on the Influence and Application of Foundation Pier Height on Strong Motion Records

doi: 10.3799/dqkx.2023.149

Key Laboratory of Earthquake Engineering and Engineering Motion, Institute of Engineering Mechanics, China Earthquake Administration, Key Laboratory of Earthquake Disaster Mitigation, Ministry of Emergency Management, Harbin 150080, China

Received Date: 2023-02-22
Publish Date: 2024-02-25

Abstract

Abstract

The accelerometer for strong motion observation is usually fixed on the concrete pier at a certain height, and the ground motion of ideal free field cannot be reflected completely. In order to study the influence of pier height on the strong motion records, three piers with different heights and the same cross-sectional dimension are designed, and the effect of the pier height on the time-frequency characteristics of the strong motion records is analyzed through seismic simulation shaking table tests, bedrock records are selected as the ground motion input, and numerical simulations are applied to verify the research results, at the same time, the strong motion records of station 51SMM in Luding earthquake is modified to standard pier by filtering. It shows that the effect of the piers on the horizontal PGA, PGV and PGD increases with the increasing height, while the PGA and PGV amplitudes decrease for the vertical ground motion. Fourier amplitude spectrum in the range of 0.5-7 Hz shows that 0.6 m and 1.2 m high piers have less influence than other frequency bands, while 2.0 m high piers have the greatest influence. The experiments above show the filtering effect is better for modifying the pier with different heights, and it is better used in strong motion records of station coded by 51SMM.The piers with the height exceeding 1.2m should be avoided for strong motion observations.
- strong motion records,
- shaking table test,
- foundation piers,
- fourier amplitude spectrum,
- record correction,
- earthquake

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References(31)

References

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The Study on the Influence and Application of Foundation Pier Height on Strong Motion Records

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