首页|Effect of trigger system on experimental dispersion characteristics of active surface wave testing

Effect of trigger system on experimental dispersion characteristics of active surface wave testing

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A trigger system is typically employed in active seismic testing to trigger and synchronize multichannel surface wave data acquisition.The effect of the trigger system on the dispersion image of surface waves is empirically known to be negligible,however,theoretical explanation regarding the effect of the trigger system is insufficient.This study systematically examines the theory for surface wave dispersion analysis and proves that the effect of the trigger system on a dispersion image is negligible via a solid theoretical explanation.Subsequently,based on the new theoretical explanation,an alternative method that uses only the relative phase difference between sensors to extract dispersion characteristics with better conceptual clarity is proposed.Two active surface wave testing cases are considered to validate the theory and method.The results indicate that(1)an accurate trigger system is not necessary for surface wave data acquisition,and(2)it is unnecessary to assume that the impact point is the generation point of the surface waves for the experimental dispersion analysis.

site investigationsurface wavesdata acquisitiondispersion

Lin Shibin、Jeramy C.Ashlock、Zhu Liming、Qin Zexiang、Li Bo、Zhu Xingji、Zhai Changhai

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State Key Laboratory of Precision Blasting,Jianghan University,Wuhan 430056,China

Hubei Key Laboratory of Blasting Engineering,Jianghan University,Wuhan 430056,China

Department of Civil,Construction&Environmental Engineering,Iowa State University,Ames,IA 50010,USA

Wuhan Airport Road Development Co.,Ltd.,Wuhan 430065,China

School of Civil and Environmental Engineering,Harbin Institute of Technology,Shenzhen 518055,China

Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology,Harbin 150090,China

Key Lab of Smart Prevention and Mitigation of Civil Engineering Disaster of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150090,China

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Natural Science Foundation of Hubei Province of China for Distinguished Young ScholarsNatural Science Foundation of Hubei Province of China for Key Projects(Innovation Group)National Natural Science Foundation of China

2023AFA0992023AFA03052178471

2024

10.1007/s11803-024-2237-9

地震工程与工程振动(英文版)
中国地震局工程力学研究所

地震工程与工程振动(英文版)

EI
影响因子：0.476
ISSN：1671-3664
年,卷(期)：2024.23(2)
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