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通过对 5个圆形截面钢管高强度混凝土(以下简称钢管高强混凝土 )柱的耐火试验 ,研究钢管高强混凝土柱在标准温升曲线下的力学性能和耐火极限。试验研究结果表明 ,钢管高强混凝土柱具有较好的耐火性能 ,在柱子外围只需进行适当的防火涂料保护 ,即可达到《高层民用建筑设计防火规范》(GB5 0 0 4 5 -95 )对柱结构所要求的耐火极限。
Through the fire resistance test of five columns of high strength concrete with circular steel tube (hereinafter referred to as steel tube), the mechanical properties and fire resistance of the high strength concrete filled steel tubular column under standard temperature rise curve were studied. The experimental results show that the high strength concrete filled steel tubular columns have good fire resistance. Only the proper protection of fire retardant coatings on the periphery of the columns can achieve the requirements of “Code for Fire Protection of High-Rise Civil Buildings” (GB5 0 0 4 5 -95) The required fire resistance of the structure.