Abstract:

The fire resistance performance of typical section glulam components was calculated by the residual section method, and a physical fire test was carried out on a glulam structure with plane size of 7.2 m×7.0 m and height of 4.5 m. The results showed that the fire resistance of the glulam components is greatly affected by the load ratio and the heating curve. At 90% load ratio, the fire resistance of a glulam beam with a crosssection size of 200 mm×400 mm is about 50 min. Under the ISO 834 standard heating curve and the large space heating curve for 75 minutes, the carbonization depth of the component section with a cross section size of 220 mm×280 mm is about 40 mm and 30 mm respectively. Without external fire source, the glulam structure is difficult to burn, and the fire spread range is limited. The results obtained from the calculation of the carbonization depth of the glulam cross section, the calculation of the fire resistance limit of the components, and the physical fire test of the glulam structure provide a reference for the analysis of the fire resistance performance of the glulam structure in the project. 

Key words: glulam structure, carbonization depth, fire resistance, fire test