冷弯薄壁钢-陶粒混凝土组合楼板火灾响应试验研究  

Experimental study of fire response of composite slab of cold-formed thin-walled steel and ceramsite concrete

作　　者：孟郅恒 王新堂 刘链波 MENG Zhi-heng;WANG Xin-tang;LIU Lian-bo(School of Civil and Environmental Engineering,Ningbo University,Ningbo 315211.China;Collegeof Science and Technology.Ningbo University,Ningbo 315000,China)

机构地区：[1]宁波大学土木与环境工程学院,浙江宁波315211 [2]宁波大学科学技术学院,浙江宁波315000

出　　处：《空间结构》2021年第1期52-59,36,共9页Spatial Structures

基　　金：国家自然科学基金项目(51678312)。

摘　　要：楼板为建筑物的重要构件,对楼板在各种火灾条件下的火灾响应研究对于楼板的抗火与防火设计意义重大.对4块板厚60mm、遭受温度为700℃、持续90min烃类火灾作用的冷弯薄壁钢-陶粒混凝土组合楼板试件开展了火灾响应试验研究,得到了组合楼板的响应温度场、火灾下的位移响应及楼板的破坏特征.试验结果表明,不同构造特征的组合楼板,其火灾下的位移响应有明显的差异,其中4个组合楼板试件的最大竖向位移分别为54.2mm, 61.9mm, 48.7mm和59.9mm.预制板之间设置的钢条连接件是否固定对组合楼板的火灾下位移有一定影响,其中固定后的位移较不固定小14.2%.Floor is a crucial component of buildings. Study of fire response of floor under various fire conditions is of great significance for fire resistance and fire protection design of floor. Four cold-formed thin-walled steel-ceramsite concrete composite slabs with thickness of 60 mm, temperature of 700℃ and 90 minutes duration under hydrocarbon fire were tested for fire response. The response temperature field, displacement response under fire and failure characteristics of the composite slabs were obtained. The test results show that the displacement responses of composite slabs with different structural characteristics are significantly different under fire. The maximum vertical displacements of four composite slabs are 54.2 mm, 61.9 mm, 48.7 mm and 59.9 mm, respectively. Whether the steel bar connectors installed between prefabricated slabs are fixed or not has certain effect on the displacement of composite slabs under fire, and the displacement of the slabs with fixed connectors is 14.2% smaller than that of slabs with non-fixed ones.

关 键 词：装配式楼板 冷弯薄壁钢 陶粒混凝土 火灾响应 抗火试验 

分 类 号：TU398[建筑科学—结构工程]