中文摘要：

对3块简支组合楼板与4块连续组合楼板进行了恒载升温条件下的火灾试验研究，并对板的变形、破坏机构、内力重分布进行了研究分析。试验结果表明：简支板的耐火性能很差，而连续板由于负弯矩钢筋的显著作用，其耐火性能较好；升、降温阶段连续板均会出现剧烈的内力重分布，不同受火工况对连续板内力重分布的影响非常大；塑性铰的出现时间,位置与次序对连续板的火灾反应有很大影响。最后提出了升温阶段连续板支座反力变化的简化分析方法，其计算结果与试验结果相符合。

英文摘要：

The behaviors of three simply-supported composite slabs and four continuous composite slabs subjected to fire with constant load were experimented. The distortion, destruction form and internal force redistribution of the slabs were investigated. It can be shown from the experiments that the fire resistance Capability of simply-supported slabs is bad, while that of continuous slabs is good due to the positive effect of negative tensile reinforcement. It can also be shown that both in temperature-rise period and temperature-descent period, there is sharp redistribution of internal force in continuous slabs, and the different fire-suffering conditions have great effect on the behaviors of continuous slabs. At the same time, the time, positions and orders of the plastic hinges＇ appearance also have great effect on the response of the continuous slabs. At last, a simple method is proposed to analyze the variety of support reactions of continuous slabs during the temperature-rise period, and the calculated results fit well with the experimental results.