|
Title |
Experimental Study on the Fire Performance of PC Slab by the Bearing Length
|
|
Authors |
박시영(Siyoung Park) ; 강현구(Thomas H.-K. Kang) ; 이호욱(Ho-Wook Lee) ; 곽시영(Si-Young Gwak) ; 박준규(Jun-Kyu Park) |
|
DOI |
https://doi.org/10.11112/jksmi.2022.26.6.14 |
|
Keywords |
걸침길이; 실외 화재실험; 고온 재료물성; PC 슬래브 Bearing length; Field fire test; High-temperature material properties; PC slab |
|
Abstract |
In this study, a fire test was conducted to evaluate the fire performance of precast concrete (PC) slabs in an outdoor environment in responseto the increase in fire incidents caused by the growth of warehouses. Prior to the field fire test, the tensile yield strength of the tendon at elevatedtemperatures was tested to analyze the mechanical properties. Also, by referring to previous studies, the thermal properties of tendon and the mechanicaland thermal properties of concrete were investigated. A field fire test was conducted to analyze the structural and fire performance of two identicalslabs with 50 and 150 mm bearing length. As the bearing length increased, deflection and horizontal displacement decreased. The fire test lasted for200 minutes without the collapse of slabs, validating current codes. Based on the structural performance which maintained even with concrete spallingand rupture of some tendons, the bonded method is assumed to be practical in pre-tensioned PC slabs. The results of fire test are expected to be utilizedin evaluating the fire performance of PC slabs in warehouses.
|