CONSTRUCTION AND APPLICATION OF ROBUST MODELING METHOD OF SUBSURFACE SOIL LAYERS FOR NUMERICAL ANALYSIS OF URBAN AREA GROUND MOTION DISTRIBUTION

2020 ◽  
Vol 76 (2) ◽  
pp. I_543-I_552
Author(s):  
Hiroki MOTOYAMA ◽  
Kahori IIYAMA ◽  
Yoshiyuki KANEDA ◽  
Wataru SHIRAKI ◽  
Kazuhito FUJISAWA ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Urban Area ◽  
Ground Motion ◽  
Modeling Method ◽  
Soil Layers ◽  
Robust Modeling ◽  
Subsurface Soil

scholarly journals Estimation of Subsurface Soil Layers using H/V Spectrum of Densely Measured Microtremor Observations (Case Study: Yogyakarta City, Central Java-Indonesia)

2014 ◽  
Vol 2 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Zaw Lin Kyaw ◽  
◽  
Subagyo Pramumijoyo ◽  
Salahuddin Husein ◽  
Teuku Faisal Fathani ◽  
...  
Keyword(s):  
Soil Layers ◽  
Central Java ◽  
Subsurface Soil ◽  
Yogyakarta City

307 Numerical Analysis of Blood Flow in A Left Ventricle shaped by 2 Chamber Modeling Method

2001 ◽  
Vol 2001.14 (0) ◽  
pp. 275-276
Author(s):  
Hidehito Iwase ◽  
Hao Liu ◽  
Shinichi Fujimoto ◽  
Ryutaro Himeno ◽  
Tomoaki Hayasaka
Keyword(s):  
Blood Flow ◽  
Numerical Analysis ◽  
Left Ventricle ◽  
Modeling Method

scholarly journals Numerical analysis of a pollutant dispersion in subsurface soil

2011 ◽  
Vol 54 (11-12) ◽  
pp. 3197-3203 ◽  
Author(s):  
Kyung-Suk Suh ◽  
Ki-Chul Kim ◽  
Geon-Hyeong Park ◽  
Sung-Hee Jung ◽  
Jung-Lyul Lee
Keyword(s):  
Numerical Analysis ◽  
Pollutant Dispersion ◽  
Subsurface Soil

scholarly journals Experimental and Numerical Analysis of Photovoltaics System Improvements in Urban Area

2018 ◽  
Vol 28 (4) ◽  
pp. 13-24 ◽  
Author(s):  
Maciej Żołądek ◽  
Krzysztof Sornek ◽  
Karolina Papis ◽  
Rafał Figaj ◽  
Mariusz Filipowicz
Keyword(s):  
Energy Efficiency ◽  
Numerical Analysis ◽  
Urban Area ◽  
Distributed Generation ◽  
Environmental Analysis ◽  
Urban Areas ◽  
Science And Technology ◽  
Significant Part ◽  
Pv System ◽  
Improve Energy Efficiency

Abstract Nowadays, photovoltaic systems installed in urban areas have to be an essential part of distributed generation systems, and lead to improve energy efficiency of buildings. The paper describes the operation aspects of the 7,5 kWp photovoltaic installation located on the roof of the didactic building of AGH University of Science and Technology. The significant part of the roof Is occupied by HVAC installation, so the periodic shading is occurring. It makes, that a level of energy generated in the PV system is lower than expected. The first part of the test was focused on the validating model of the installation and determine its impact on the CO2 emissions. Then, modifications in the arrangement of the panels were considered (redirecting of additional light stream). Moreover, an economic and environmental analysis of proposed improvements were conducted.

scholarly journals An Improved Method for Automatic Identification and Assessment of Potential Geohazards Based on MT-InSAR Measurements

2021 ◽  
Vol 13 (17) ◽  
pp. 3490
Author(s):  
Shuran Luo ◽  
Guangcai Feng ◽  
Zhiqiang Xiong ◽  
Haiyan Wang ◽  
Yinggang Zhao ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Urban Area ◽  
Ground Motion ◽  
Large Scale ◽  
Synthetic Aperture ◽  
Interferometric Synthetic Aperture Radar ◽  
Improved Method ◽  
Spatial Coverage ◽  
High Instability ◽  
Aperture Radar

Multi-temporal Interferometric Synthetic Aperture Radar (MT-InSAR) has been widely used for ground motion identification and monitoring over large-scale areas, due to its large spatial coverage and high accuracy. However, automatically locating and assessing the state of the ground motion from the massive Interferometric Synthetic Aperture Radar (InSAR) measurements is not easy. Utilizing the spatial-temporal characteristics of surface deformation on the basis of the Small Baseline Subsets InSAR (SBAS-InSAR) measurements, this study develops an improved method to locate potential unstable or dangerous regions, using the spatial velocity gradation and the temporal evolution trend of surface displacements in large-scale areas. This method is applied to identify the potential geohazard areas in a mountainous region in northwest China (Lajia Town in Qinghai province) using 73 and 71 Sentinel-1 images from the ascending and descending orbits, respectively, and an urban area (Dongguan City in Guangdong province) in south China using 32 Sentinel-1 images from the ascending orbit. In the mountainous area, 23 regions with potential landslide hazards have been identified, most of which have high to very high instability levels. In addition, the instability is the highest at the center and decreases gradually outward. In the urban area, 221 potential hazards have been identified. The moderate to high instability level areas account for the largest proportion, and they are concentrated in the farmland irrigation areas, and construction areas. The experiment results show that the improved method can quickly identify and evaluate geohazards on a large scale. It can be used for disaster prevention and mitigation.

scholarly journals SOURCE MODELING METHOD OF INTRA-PLATE EARTHQUAKES FOR DESIGN GROUND MOTION

2015 ◽  
Vol 71 (2) ◽  
pp. I_718-I_723
Author(s):  
Masayuki YAMADA ◽  
Yoshihiro ITO ◽  
Atsushi NOZU ◽  
Takashi NAGAO
Keyword(s):  
Ground Motion ◽  
Modeling Method ◽  
Source Modeling

Experimental and analytical study on sliding vibration of a solid body

2019 ◽  
Vol 25 (18) ◽  
pp. 2480-2493 ◽  
Author(s):  
Hakan Yerlikaya ◽  
Satsuya Soda
Keyword(s):  
Numerical Analysis ◽  
Ground Motion ◽  
Computer Model ◽  
Structural Model ◽  
Base Isolation ◽  
Earthquake Ground Motion ◽  
Friction Behavior ◽  
Maximum Acceleration ◽  
Isolation System ◽  
Concrete Base

It is accepted that the use of base isolation systems within a structure offers a decreased amount of maximum acceleration value throughout the structure and provides a higher level of comfort and safety to the residents even during extremely strong ground motions. We want to propose a new low-cost structural system with the aforementioned benefits of the base isolation. A structural model was developed using an ultra-high-molecular-weight polyethylene film as a friction surface for the whole concrete base of a residential house, creating a friction-based base-isolation system. To understand the friction behavior between the two materials, a computer model was developed in SAP2000 software, and experiments were conducted to confirm the computer model’s proposed behavior. The created computer model is capable of accounting for the adjustments of the dynamic and static friction parameters depending on the velocity of the block. It is possible to conduct the numerical analysis with three-directional input to the system as well as nonlinear solving capabilities. The results of the numerical analysis are compared with the experiment results on a one-directional wave, along with the 1995 Kobe Earthquake ground motion record that had an input in three directions. The results confirm the reproducibility and predictable behavior of the proposed base-isolation method. The maximum acceleration of the concrete base will be no greater than nearly 30% of gravity acceleration regardless of the maximum acceleration of the ground motion.

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