Simulation of Ground Motions from Gyeongju Earthquake using Point Source Model

2016 ◽  
Vol 20 (7 Special) ◽  
pp. 537-543
Author(s):  
Seong Jin Ha ◽  
◽  
Hyun Woo Jee ◽  
Sang Whan Han
Keyword(s):  
Point Source ◽  
Ground Motions ◽  
Source Model ◽  
Gyeongju Earthquake

Analysis of Thermal Radiation Models for Large Open Pool Fire on Ship Deck

2013 ◽  
Vol 470 ◽  
pp. 259-262
Author(s):  
Li Bin Ding ◽  
Jin Yun Pu ◽  
Kai Ren
Keyword(s):  
Heat Flux ◽  
Thermal Radiation ◽  
Point Source ◽  
Engineering Design ◽  
Source Model ◽  
Heat Fluxes ◽  
Pool Fire

Three radiation models are discussed in the present paper. The heat fluxes vary considerably between different methods. In all models, fluxes vary highly on the position of nearing the flame and are almost identical on the far away position. Heat fluxes calculated from point source model is less than other two models, and Shokri-Beyler model is highest. Shokri-Beyler method is most applicable at heat fluxes greater than 5 KW/m2 and recommended in engineering design, and Mudan model is not applicable for calculating the heat flux nearing the flame.

scholarly journals Modelling the thermal radiation from kitchen hob fires

2020 ◽  
Vol 38 (4) ◽  
pp. 377-394
Author(s):  
Michael Spearpoint ◽  
Charlie Hopkin ◽  
Danny Hopkin
Keyword(s):  
Heat Flux ◽  
Point Source ◽  
Radial Distance ◽  
Source Model ◽  
View Factor ◽  
Calculation Methods ◽  
Fire Dynamics ◽  
Potential Threat ◽  
Computational Tools

Kitchen hob fires present a potential threat to occupants escaping from dwellings and calculations may be needed to assess the hazard. Determination of the thermal heat flux from flames to a target can be achieved through the use of hand calculation methods or computational tools. This article compares point source, parallel plane and cylindrical view factor hand calculations and computational simulations using B-RISK and Fire Dynamics Simulator of thermal heat flux with kitchen hob fire experiments presented in the literature. Knowing the level of accuracy of each method provides useful information to designers. Although the point source model is influenced by whether the radial distance is measured perpendicular to the heat flux target or is offset relative to the centre of the flame, the article concludes that it provides an adequate approach for the calculation of thermal heat flux in the case of kitchen hob fires.

From Source to Building Fragility: Post-event Assessment of the 2013 M7.1 Bohol Philippines Earthquake

2019 ◽  
pp. 101716EQS173M
Author(s):  
Muriel Naguit ◽  
Phil Cummins ◽  
Mark Edwards ◽  
Hadi Ghasemi ◽  
Bartolome Bautista ◽  
...  
Keyword(s):  
Ground Motion ◽  
Ground Motions ◽  
Source Model ◽  
Motion Prediction ◽  
Ground Motion Prediction Equations ◽  
Ground Motion Prediction ◽  
Effective Implementation ◽  
Ideal Candidate ◽  
Post Disaster ◽  
Disaster Exposure

We use ground motion simulations of the 2013 Bohol Philippines earthquake along with a new post-disaster exposure/damage database to constrain building fragility and vulnerability. The large number of damaged buildings (>70,000) and the wide spread of seismic intensities caused by this earthquake make it an ideal candidate for such a study. An extensive survey was conducted leading to a robust description of over 25,000 damaged and undamaged structures. Ground motion fields were simulated using ground motion prediction equations and stochastic modeling, and the estimated and observed values were compared. The finite source model used in the simulation was based on the analysis of aftershocks and SAR data. The ground motions were associated with the empirical database to derive fragility and vulnerability models. Results indicate that the pattern of damage is best captured in the stochastic simulation. Constraints were placed on seismic building fragility and vulnerability models, which can promote more effective implementation of construction regulations and practices.

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