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Seismic Performance Evaluation of Improved Jet Grouted Grid Form with Horizontal Slab in Liquefaction Mitigation

Open Journal of Civil Engineering 2020年第3期10卷 301-320页

作者： myat myat phyo phyo Hemanta Hazarika Li Shi Hiroaki Kaneko Tadashi Akagawa Department of Civil and Structural Engineering Kyushu University Fukuoka Japan Department of Civil Engineering Kyushu University Fukuoka Japan Japan Foundation Engineering Co. Ltd. Tokyo Japan

A chain event of the 2016 Kumamoto earthquakes caused considerable geotechnical damage related to liquefaction in many places around Kumamoto plain. Many low-rise houses and traditional Japanese style houses, which were constructed on shallow foundation, suffered differential settlement and tilting due to liquefaction. To mitigate the building damages due to the liquefaction, a new countermeasure method of jet grout grid form with a horizontal slab is introduced in this study. The effectiveness of the proposed technique was evaluated through physical modelling and numerical modelling. As a part of the physical modelling, a set of 1 g shaking table tests for unimproved case and improved case were performed, in which the mitigation effects of the grid form with a horizontal reinforcing slab were examined based on the acceleration, excess pore water pressure ratio as well as ground settlement. Numerical simulation was also performed for assessing the effect of improved method on soil-structure

关键词： Liquefaction Mitigation Jet Grouting Shaking Table Tests Numerical Simulation

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Computerized FDTD Method for Longitudinal Optical Phonon Energy on Semiconductor Hybrid Structure for High Power Devices Fabrication

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Journal of Computer Science Research 2021年第2期3卷 39-51页

作者： phyo Sandar Win Hsu myat Tin Swe Hla Myo Tun Department of Electronic Engineering Technological University(Taungoo)BagoMyanmar Faculty of Electrical and Computer Engineering Yangon Technological UniversityYangonMyanmar

The research problem in this study is the longitudinal optical phonon energy on metal/semiconductor interface for high performance semiconductor *** research solution is to make the software model with finite difference time domain(FDTD)solution for transmission and reflection pulse between metal and semiconductor interface for carrier dynamics *** objective of this study is to find the quantum mechanics understanding on interface engineering for fabricating the high performance device for future semiconductor technology *** analysis was carried out with the help of *** quantum mechanical spatial field on metal-semiconductor stripe structure has been analyzed by FDTD *** emission reveals a characteristic polar radiation distribution of electric dipoles and a wavelength independent of the structure size or the direction of emission;consequently,it is attributed to thermally generate electric dipoles resonating with the longitudinal optical phonon *** energy occurs lattice vibration of material by the polarization of light,if the material has rigid structure reflect back the incident ***,high reflective metal-semiconductor structure always use as photodectors devices in optical fiber *** lattice vibration material structure has no phonon effect,so this structure based devices can get high performance any other structure based *** transmission and reflection coefficient of metal-semiconductor GaN/Au layer structure compare with GaN/Ti and GaN/Pt ***(P)and transverse(S)polarization of light incident on a metal-semiconductor nanolayer structure with IR *** use of the layer by layer(LbL)method to fabricate nanofilms requires meeting certain conditions and limitations that were revealed in the course of research on model systems.

关键词： FDTD Semiconductor structure Computer simulation Computer programming MATLAB

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