Experimental study on fire-resistance performance of full-scale load-bearing cross-laminated timber walls
Full-scale experimental tests were carried out to study the fire-resistance performance of cross-laminated timber walls in load-bearing conditions.The tested wall specimens had sizes(width×height×thickness)of 3 600 mm×4 000 mm×175 mm,and subjected to a linear load of 120 kN/m.The two tested walls were protected with one-layer of 15 mm-thick fire-resistant gyp-sum board and two-layers of 12 mm-thick fire-resistant gypsum boards,respectively.Test results show that,for the specimen 5W-1 protected with one-layer of 15 mm-thick fire-resistant gypsum board,the gypsum board fell off at about 55 min,and no obvious char layer delamination was observed because this specimen was made using the heat-resistant PUR adhesive.For the specimen 5W-2 protected two-layers of 12 mm-thick fire-resistant gypsum boards,the 1st layer of gypsum board fell off at about 40 min and the 2nd layer fell off at about 85 min,and the char layer delami-nated after the furnace burner was terminated,because this speci-men was made using the ordinary PUR adhesive.At 121 min,the vertical displacements of the wall specimens were about-10.3 mm and-9.5 mm,respectively.The unexposed sides of the wall specimens showed intact,and the temperature rise on the unex-posed sides were less than 5℃for the both specimens.The final results show that the two tested wall specimens have lord-bearing capacity,fire integrity and insulation not less than 2.00 h.
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万方数据
维普
