中文摘要：

为考查本构模型对混凝土双向板火灾行为的影响,建立不考虑骨料类型影响的混凝土高温本构模型,编程对混凝土试验板火灾行为进行分析,验证了本构模型的有效性。在此基础上,基于EC2、ASCE和该文模型,分析本构模型、火灾工况、板厚和骨料类型等参数对混凝土双向板火灾行为的影响规律。结果表明,与EC2和ASCE模型计算结果相比,该文模型所得结果均趋于保守。

英文摘要：

To investigate the effect of constitutive models on the fire behavior of reinforced concrete slabs, this paper proposed the concrete constitutive models without considering the influence of aggregate type. The program was developed to trace the behavior of two-way reinforced concrete slab in fire. The reasonability of the proposed constitutive models was verified by comparing the predictions from the present program with data from fire tests. According to EC2, ASCE and present models, the program was applied to investigate the influence of the constitutive models, fire scenarios, thickness and aggregate type on the fire response of slabs. The results show that the proposed constitutive models tend to predict conservative results, compared with those obtained from EC2 and ASCE models.