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Influence of Long-term Climate on Fatigue Life of Bridge Pier Concrete and a Reinforcement Method

Hydro Science & Marine Engineering 2019年第1期1卷 2-8页

作者： Nam-Hyok ri kum-Hyok So Yong-Sop ri Zhiyao Ma Yong-Ae Kim Hui-Gwang Yun School of Architecture Tianjin UniversityTianjin300072China Faculty of Mechanics Engineering Kim Il Sung UniversityPyongyangDPR of Korea School of Civil Engineering Tianjin UniversityTianjin300072China Department of Resources Exploration Engineering Kim Chaek University of technologyPyongyangDPR of Korea

This paper quantitatively evaluated the fatigue life of concrete around the air-water boundary layer of bridge piers located in inland rivers,considering the long-term *** paper suggests a method to predict the low-cycle fatigue life by demonstrating a thermal-fluid-structural analysis of bridge pier concrete according to long-term climate such as temperature,velocity and pressure of air and water in the process of freezing and thawing in *** addition,it proposes a reinforcing method to increase the life of damaged piers and proves the feasibility of the proposed method with numerical comparison experiment.

关键词： Hydraulic concrete Bridge pier Concrete depression failure Scour phenomenon Low-cycle fatigue life Long-term climate Thermal-structural analysis Fluid-structural analysis ANSYS

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Anomalous plasmon coupling and Fano resonance under structured light

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光子学研究:英文版 2023年第8期11卷 1423-1430页

作者： DA-JIE YANG SONG-JIN IM HAI-WEN HUANG CHOL-SONG ri kum-DONG KIM KIL-SONG SONG JI-CAI LIU QU-QUAN WANG Mathematics and Physics Department North China Electric Power UniversityBeijing 102206China Hebei Key Laboratory of Physics and Energy Technology North China Electric Power UniversityBaoding 071000China Department of Physics Kim Il Sung University02-381-4410 PyongyangRepublic of Korea Department of Physics Southern University of Science and TechnologyShenzhen 518055China

Structured light carrying orbital angular momentum(OAM)opens up a new physical dimension for studying light–matter *** this,the complex fields created by OAM beams still remain largely unexplored in terms of their effects on surface *** paper presents a revelation of anomalous plasmon excitations in single particles and plasmon couplings of neighboring nanorods under OAM beams,which are forbidden using non-OAM *** plasmon excitation of single nanoparticles is determined both by photon spin angular momentum(SAM)and OAM and influenced by the locations of the ***,when SAM and OAM are equal in magnitude and opposite in direction,a pure plasmon excitation along light propagation direction is *** plasmon dipoles show end-to-end antibonding coupling and side-by-side bounding coupling,which are the opposite of the typical ***,we observe Fano resonance with a nanorod dimer:one aligned along light propagation direction acting as the bright mode and the other aligned along the global polarization direction of light acting as the dark mode,which is the opposite of the usual plasmonic Fano *** taking advantage of the unique property of the OAM source,this investigation presents a novel way to control and study surface plasmons,and the research of plasmon behavior with OAM would open new avenues for controlling electromagnetic waves and enriching the spectroscopies with more degrees of freedom.

关键词： polarization coupling plasmon

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