Cellular beams provide architects and engineers with lightweight structural solutions for spanning large areas. However, web cut-outs may lead to a significant decrease in mechanical properties at elevated temperatures.. An experimental model and near full-scale fire testing have been conducted for the first time in Turkey to better estimate fire performances of steel-concrete composite floor beams with and without circular web openings. Within the context of this experimental work, two composite beams made of IPE 140 rolled sections with solid and open webbed configurations and under assumed service loading are tested to failure following the ISO 834 fire conditions. Additionally, variations in mechanical properties of the materials used are determined after testing. As a result, unprotected solid webbed DK-R specimen provided a longer fire resistance than the unprotected cellular beam GBK-YS as expected. This reveals that web openings in composite beams have a pronounced impact on fire resistance of such beams, leading to premature failures. Therefore, such beams may not reach the predetermined fire strengths without implementing an appropriate protection against fire.
Primary Language | Turkish |
---|---|
Journal Section | Articles |
Authors | |
Publication Date | June 30, 2019 |
Published in Issue | Year 2019 Volume: 34 Issue: 2 |