Experimental and Numerical Investigations on Fire-Resistance Performance of Precast Concrete Hollow-Core Slabs

Applied Sciences

Khaliunaa Darkhanbat¹  Hoseong Jeong¹  Kang Su Kim¹  Seung-Ho Choi²  Sun-Jin Han²  Inwook Heo² 

[1] Department of Architectural Engineering and Smart City Interdisciplinary Major Program, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul 02504, Korea;Department of Architectural Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul 02504, Korea;

关键词: hollow-core slab;    precast concrete;    prestressed concrete;    fire resistance performance;    nonlinear finite element analysis;   

DOI  :  10.3390/app112311500

来源: DOAJ

【 摘 要 】

In this study, full-scale fire tests and finite element (FE) analyses are conducted to investigate the fire resistance performance of hollow-core slabs (HCSs) manufactured using the extrusion method. The deflection of the HCS specimens and the temperature distribution in the section according to the fire exposure time are measured and analyzed comprehensively, and the test results are compared with the FE analysis results. In addition, parametric analyses are conducted on 21 cases with the HCS depth, span length, hollow ratio in a section, cover thickness of concrete, and load ratio (i.e., the ratio of the external load to the ultimate load) as variables, based on which the fire resistance performance of the HCS according to each variable is investigated. The analysis results show that the load ratio is a key factor governing the fire resistance behavior of HCSs, whereas the effects of the cover thickness of concrete and the hollow ratio in a section are relatively slight within the range of variables examined in this study.

【 授权许可】

Unknown