Energy‐based analysis of seismic damage mechanism of multi‐anchor piles in tunnel crossing landslide area

作     者：Hong Wei Honggang Wu Guojun Ren Lin Tang Kang Feng Hong Wei;Honggang Wu;Guojun Ren;Lin Tang;Kang Feng

作者机构：College of Resource and Environment EngineeringGuizhou UniversityGuiyangChina China Northwest Research Institute Co.Ltd.of CRECLanzhouChina College of Civil Engineering and ArchitectureSouthwest University of Science and TechnologyMianyangChina 

出 版 物：《Deep Underground Science and Engineering》 (深地科学（英文）)

年 卷 期：2023年第2卷第3期

页      面：245-261页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：Science and technology development project of China Railway Ninth Bureau Group Co.,Ltd,Grant/Award Number:DLF‐ML‐JSFW‐2021‐09 Science and Technology Development Project of China Railway Research Institute Co.Ltd,Grant/Award Number:2017‐KJ008‐Z008‐XB Gansu Province Youth Science and Technology Fund program,China,Grant/Award Number:21JR7RA739 Natural Science Foundation of Gansu Province,China,Grant/Award Number:21JR7RA738 National Key R&D Program of China,Grant/Award Number:2018YFC1504901 

主　　题：Hilbert-Huang transform marginal spectrum multi‐anchor piles seismic damage mechanism 

摘      要：To study the damage mechanism of multi‐anchor piles in tunnel crossing landslide area under earthquake,the damping performance of multi‐anchor piles was *** energy dissipation springs were used as the optimization device of the anchor head to carry out the shaking table comparison test on the reinforced *** Hilbert spectrum and Hilbert marginal spectrum were proposed to analyze the seismic damage mechanism of the multi‐anchor piles,and the peak Fourier spectrum amplitude(PFSA)was used to verify the effectiveness of the *** results show that the seismic energy is concentrated in the high‐frequency component(30-40Hz)of the Hilbert spectrum and the low‐frequency component(12-30 Hz)of the marginal *** indicates that they can be combined with the distribution law of the PFSA to identify the overall and local dynamic responses of the multi‐anchored piles,*** stretchable deformation of the energy‐dissipation springs improves the coordination of the multi‐anchor piles,resulting in better pile *** damage mechanism of the multi‐anchor piles is elucidated based on the energy method:local damage at the top and middle areas of the multi‐anchor piles is mainly caused by the low‐frequency component(12-30 Hz)of the marginal spectrum under the action of 0.15g and 0.20g seismic *** the seismic intensity increases to 0.30g,the dynamic response of the slope is further amplified by the high‐frequency component(30-40 Hz)of the Hilbert energy spectrum,which leads to the overall damage of the multi‐anchor piles.