（昆明理工大学建筑工程学院， 昆明 650500）

［摘要］通过对钢筋混凝土板温度场进行数值模拟，研究了钢筋混凝土板的耐火极限与混凝土保护层厚度、板厚及受荷水平之间的关系。结果表明：耐火极限随混凝土保护层厚度的增大有显著的提高，而钢筋混凝土板厚对楼板的耐火极限基本没有影响；钢筋混凝土板承受的荷载水平越高，其耐火极限越低。

［关键词］钢筋混凝土板；温度场模拟；保护层厚度；板厚；荷载水平；耐火极限

中图分类号：TU375文献标识码：A文章编号：1002-848X(2021)08-0066-05

Influence of protective layer thickness, slabs thickness and load level on the refractory limit of reinforced concrete slabs

LIU Lixian, DENG Mingkang, LI Wei, ZHAO Guangshu

（Faculty of Civil Engineering,  Kunming University of Science and Technology， Kunming 650500， China）

Abstract:Through numerical simulation of the temperature field of reinforced concrete slabs, the relationship between the refractory limit of reinforced concrete slabs and the concrete protective layer thickness, the thickness of the slab and the load level of the slab was studied. The results show that the refractory limit increases significantly as the concrete protective layer thickness increases, while the reinforced concrete slab thickness has no effect on the refractory limit of the slabs; the higher the load level the reinforced concrete slab bears, the lower the refractory limit.

Keywords:reinforced concrete slab;temperature field simulation;protective layer thickness;slab thickness;load level;refractory limit

作者简介：刘利先，博士，副教授，Email:1773535933@qq.com；

通信作者：邓明康，硕士研究生，Email:305976203@qq.com。