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Analysis and behaviour of FRP-confined short concrete columns subjected to eccentric loading

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第1期9卷 38-49页

作者： Xing-fei YUAN Shao-hua XIA l. lAM S.t. SMItH Department of Civil Engineering Zhejiang University Hangzhou 310027 China School of Civil and Environmental Engineering The University of Adelaide Adelaide SA 5005 Australia Department of Civil and Structural Engineering The Hong Kong Polytechnic University Hong Kong China Department of Civil Engineering Hong Kong University Hong Kong China

Fibre-reinforced polymer (FRP) composites were widely utilized in civil engineering structures as the retrofit of reinforced concrete (RC) columns. to design FRP jackets safely and economically, the behaviour of such columns should be predicted first. this paper is concerned with the analysis and behaviour of FRP-confined RC circular and rectangular short col- umns subjected to eccentric loading. A simple design-oriented stress-strain model for FRP-confined concrete in a section analysis was first proposed. the accuracy was then proved by two test data. Following that, a parametric study including amount of FRP confinement, FRP strain capacity, unconfined concrete strength and shape of column section is provided. Some conclusions were obtained at the end of the paper. the work here will provide a comprehensive understanding of the behaviour of FRP-confined concrete columns. the simplicity of the model also enables a simple equivalent stress block to be developed for direct use in practical design.

关键词： Column FRP confinement Stress-strain model Section analysis Strength Ductility

local structure and luminescent properties of lead phosphate glasses containing rare earth ions

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Journal of Rare Earths 2011年第12期29卷 1157-1160页

作者： J.Pisarska l.Zur t.Goryczka W.A.Pisarski Institute of Chemistry University of Silesia Institute of Materials Science University of Silesia

local structure and luminescent properties of lead phosphate glasses containing rare earth ions were studied. Optically active ions such as Eu^3＋, Dy^3＋, tb^3＋ and Er^3＋ were chosen as dopants. the local structure was verified using X-ray diffraction and Fourier transform inflared （Ft-IR） spectroscopy. the visible luminescence bands recorded for the studied samples corresponded to ^5D0→^7Fj （J=0÷4） transitions of Eu^3＋, ^4F9/2→^6Hj/2 （J=11÷15） transitions of Dy^3＋, ^5D3→^7FJ, （J＇=1÷6） and ^5Da→^7FJ （J=3÷6） transitions of tb^3＋, and ^4S1/2→^4I15/2 transitions of Er^3＋.

关键词： lead phosphate glasses rare earth ions local structure luminescent properties

Superconductivity in antiperovskites

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npj Computational Materials 2022年第1期8卷 1424-1433页

作者： Noah Hoffmann tiago F.t.Cerqueira Jonathan Schmidt Miguel A.l.Marques Institut für Physik Martin-Luther-Universität Halle-WittenbergD-06099HalleGermany CFisUC Department of PhysicsUniversity of CoimbraRua Larga3004-516CoimbraPortugal

We present a comprehensive theoretical study of conventional superconductivity in cubic antiperovskites materials with composition XYZ_(3) where X and Z are metals,and Y is H,B,C,N,O,and *** starting point are electron–phonon calculations for 397 materials performed with density-functional perturbation *** 43%of the materials are dynamically unstable,we discovered 16 compounds close to thermodynamic stability and with t_(c) higher than 5 *** these results to train interpretable machine-learning models,leads us to predict a further 57(thermodynamically unstable)materials with superconducting transition temperatures above 5 K,reaching a maximum of 17.8 K for ***,the models give us an understanding of the mechanism of superconductivity in *** combination of traditional approaches with interpretable machine learning turns out to be a very efficient methodology to study and systematize whole classes of materials and is easily extendable to other families of compounds or physical properties.

关键词： properties theory perovskite

the evolving landscape in the therapy of acute myeloid leukemia

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Protein & Cell 2013年第10期4卷 735-746页

作者： Grace l.Peloquin Yi-Bin Chen Amir t.Fathi Massachusetts General Hospital Cancer Center Harvard Medical SchoolBostonMA 02114USA

Acute myeloid leukemia(AMl)is a heterogeneous clonal disorder of myeloid precursors arrested in their matura-tion,creating a diverse disease entity with a wide range of responses to historically standard treatment *** signifi cant progress has been made in character-izing and individualizing the disease at diagnosis to op-timally inform those affected,progress in treatment to reduce relapse and induce remission has been limited thus *** addition to a brief summary of the factors that shape prognostication at diagnosis,this review attempts to expand on the current therapies under investigation that have shown promise in treating AMl,including hy-pomethylating agents,gemtuzumab ozogamicin,Flt3 ty-rosine kinase inhibitors,antisense oligonucleotides,and other novel therapies,including aurora kinases,mtOR and PI3 kinase inhibitors,PIM kinase inhibitors,HDAC inhibitors,and IDH targeted *** these,and undoubtedly many others in the future,it is the hope that by combining more accurate prognostication with more effective therapies,patients will begin to have a different,and more complete,outlook on their disease that allows for safer and more successful treatment strategies.

关键词： acute myeloid leukemia hypomethylating Flt3 gemtuzumab ozogamicin

training β relaxation to rejuvenate metallic glasses

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Journal of Materials Science & technology 2023年第27期158卷 53-62页

作者： l.t.Zhang Yun-Jiang Wang Y.Yang J.C.Qiao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an 710072China State Key laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China Department of Mechanical Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong Kong SARChina Department of Materials Science and Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong Kong SARChina Innovation Center NPU-ChongqingChongqing 401135China

In the current work,we demonstrated that the rejuvenation of metallic glasses can be achieved through training theβrelaxation *** the increase in the training frequency,a transition from structural relaxation to rejuvenation can be *** rejuvenation treatment is unexpected due to it occurs at a relatively small cyclic strain of 0.2%.Rejuvenation is beneficial to increase the relaxation enthalpy and promotes the decoupling of theβrelaxation process andαrelaxation process.A cluster ofβrelaxation time curves are formulated to describe any energetic state between ultrastable and ultimately rejuvenated metallic *** addition,rejuvenation expands the distribution ofβrelaxation process,anelastic and viscoplastic components during the deformation process.

关键词： Metallic glass βrelaxation Rejuvenation Structural heterogeneity

Reply to the note by li Piani et al.

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Defence technology（防务技术） 2024年第1期31卷 603-606页

作者： t.li Piani J.Weerheijm l.J.Sluys tU Delft Stevinweg 12628 CNDelftthe Netherlands tNO PO Box 452280 AARijswijkthe Netherlands NlDA Faculty of Military Sciences1781 CADen Helderthe Netherlands

In 2017,a ballistic phenomenological model was proposed by the authors of Ref.[1] to numerically simulate the experimental depths of small caliber projectiles impacting walls made of *** opportunity for a new model in the field revealed from the observation that two older models recently used by the authors of Ref.[2] shared a linear relationship between the penetration depth P and the impacting velocity v_(O).

关键词： Penetration Adobe Modeling

A cceleration of Ionospheric Out-Flowing Ions in the Substorm in Geo-magnetotail

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Chinese Physics letters 1999年第12期16卷 908-910页

作者： SHI Jian-kui lIU Zhen-Xing t.l.Zhang K.torkar Center for Space Science&Applied Research Chinese Academy of SciencesBeijing 100080 Space Research Institute Austrian Academy of SciencesA-8010 GrazAustria

Using dynamics equation, acceleration of out-flowing ion during dipolarization in a substorm in the magneto-tail is simulated. the main results show that: (1) the ion distribution function that is initially exponentially decreasing with increasing speed is turned into a single peak distribution, and with time the peak moves towards higher speed. (2) the peak moves along V⊥ faster than that along V||, and the ion acceleration mainly occurs in the middle of the dipolarization. (3) the higher the initial energy, the faster the peak moves, and the more energy is obtained by the ions. the ion energy theoretically calculated is as high as about 102 keV, this is consistent with the observation.

关键词： storm faster acceleration

Effect of two-step cooling process on mechanical properties of tRIP steel with high performance

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Journal of Iron and Steel Research International 2018年第4期25卷 426-432页

作者： M.l. li H. Jiang Y.l. He l.B. Chen G.t. Zhang H. Wang X.G. lu l. li School of Materials Science and Engineering Shanghai University Shanghai 200072 China State Key laboratory of Advanced Special Steel Shanghai University Shanghai 200072 China Pangang Group Research Institute Panzhihua 617000 Sichuan China

A novel two-step cooling experiment was established to simulate the slow cooling process of continuous annealing production line for transformation-induced plasticity （tRIP） steel. the microstructures and mechanical properties of tRIP steel soaked at 700℃ for different time were investigated by tensile test, scanning electron microscopy, X-ray diffraction, and thermodynamic and kinetic calculation. It is shown that the steel soaked for 15 s exhibits the optimal product of strength and elongation （PSE 〉 30,000 MPa%） due to the transformation of austenite to proeutectoid ferrite, which delays the bainite transformation and improves the stability of retained austenite. In addition, the mechanical properties of tRIP steel soaked over 30 s are much lower, resulting from the precipitation of cementite, which decreases the stability of retained austenite and weakens the tRIP effect.

关键词： transformation induced plasticity steel two-step cooling Microstructure Mechanical property

Observer design for a class of linear time-varying systems 36

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Observer design for a class of linear time-varying systems