시간-등가 방법을 이용한 필로티 구조물의 차량화재에 대한 공간온도평가 = Time-Equivalent Method for Evaluating Spatial Temperatures in Piloti Structures Against Vehicle Fire

국문 초록 (Abstract)

본 연구에서는 차량화재의 노출된 필로티건축물의 CFRP기둥을 대상으로 표준화재와 차량화재의 크기를 비교하기 위하여FDS-ABAQUS Coupling을 이용한 열해석을 진행하였다. 열해석 모델은 INS-10mm 모델과 , Non-INS 모델로 평가를 진행하였다. 이후 차량화재와 표준화재의 크기를 비교하였고, 표준화재를 이용한 성능기반 내화설계를 진행하기 위하여 시간-등가방법 중, 등가면적개념, 최대온도 개념을 이용하여 등가노출시간을 구하였다. 등가 노출 시간은 우선적으로 파괴기준이 명확한 부재 FRP와 철근을 대상으로 비교하였으며, FRP는 60분, 철근은 75분으로 등가시간이 나타났다. 이는 표준화재를 60분, 75분동안 화재를 노출시킬 경우 차량화재의 노출된 것과 동일한 값을 얻을 수 있는 것으로 판단된다. 정확한 등가노출시간을 구하기 위해서는 등가에너지개념 및 최소강도개념을 이용하여 등가노출시간을 구한 뒤 시간-등가 방법들 간의 비교를 진행하여 효율적인 시간-등가방법을 찾는 것이 중요하다고 판단된다.

다국어 초록 (Multilingual Abstract)

This study presents a thermal analysis conducted using FDS-ABAQUS coupling to assess the effect of vehicle fire compared to a standard fire on exposed CFRP columns of a piloti structure. The thermal analysis model was evaluated with a 10mm insulation model and a non-insulation model. Subsequently, the temperature effects of the vehicle fire and standard fire were compared. To conduct performance-based fire-resistant design using the standard fire, equivalent exposure times were determined using the time-equivalent method, employing the concepts of equivalent exposure area and maximum temperature.
The equivalent exposure times were initially compared for FRP and steel reinforcement, both of which have clear failure criteria. The equivalent exposure time for FRP was found to be 60 minutes, while for steel reinforcement, it was 75 minutes. This suggests that exposing the standard fire for 60 or 75 minutes would yield equivalent results to those observed in a vehicle fire. To accurately determine equivalent exposure times, it is crucial to use the concepts of equivalent energy and minimum strength to calculate the equivalent exposure times and then compare various time-equivalent methods to find an efficient approach.

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