| Title |
A Development of Optimum Egress Modeling by Evenly Distributed Method Based on Flow Capacity of Each Floor Exit on Escape Simulation Application |
| Authors |
Shin Dong-Cheol ; Park Hyung-Joo |
| Keywords |
Egress Modeling ; Occupancy Density ; Actual Flow Rate ; Nearest Evacuation ; Well Guided Evacuation |
| Abstract |
As our modern society has evolved to incorporate people’s busy and complex styles, buildings have been evolved toward serving multiple purposes. While this characteristic resulted in an increase of population in these building, large population would takes lot of minutes for evacuation from a certain area to escape stair connecting with ground floor. Recently, Computer simulation software, SIMULEX has been used to come up with RSET(Required Safety Egress Time) in horizontal egress assessment. Most of program has applied a nearest path selection in order to calculate total evacuation time, however it has critical problem that resulted in serious congestion at a exit with high occupancy density. As congested flow numbers for the exit may affect on total horizontal egress time for a floor, this method may not be appropriate egress capacity for the building serving multiple occupancy in a floor. An evacuation method by the nearest exit selection as human characteristic generally happens in early stage, however, well guided methods would be taken by managerial officers in real situation. Therefore, ideal RSET could not be obtained unless this method could be properly simulated on software operation. This study succeeds to equate the stack time of all exits by suggesting a well-guided distribution method instead of nearest evacuation method. This method was designed on the basis of recalculated flow velocity of each exit using connected space’s density and total area’s density. Consequently new method has proved that RSET reduced by amount of 38.8% less than the nearest evacuation method. |