【摘要】 根据梁截面火灾温度场,将梁截面混凝土分为弹性区和塑性区2部分计算火灾场梁极限承载力,并采用等效楼面活荷载描述火灾场高温对梁极限承载力的削弱,推导了相关的计算公式。通过算例与目前的梁极限承载力计算方法作了对比分析,详细论述了火灾场不同混凝土强度等级简支梁极限承载力和等效楼面活荷载的变化规律。更多还原

【Abstract】 In the calculations of ultimate bearing capacity,the section of RC beam was divided into the elastic zone and the plastic zone based on the fire temperature field of the beam’s section,the equivalent-floor-live-load was presented to describe the weakening of the bearing capacity of structure members in fire,the correlation expressions were established.In the computational example,the changing rules of bearing capacity and equivalent-floor-live-load were analyzed.更多还原