钢筋混凝土梁火灾承载力及等效楼面荷载分析  

Analysis of Ultimate Bearing Capacity and Equivalent-floor-load of Reinforced Concrete Beam in Fire

作　　者：王振清[1] 韩玉来[1] 苏娟 乔牧 

机构地区：[1]哈尔滨工程大学建筑工程学院,哈尔滨150001

出　　处：《武汉理工大学学报》2007年第6期65-68,共4页Journal of Wuhan University of Technology

基　　金：高等学校博士学科点专项科研基金(2006027010)

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。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.

关 键 词：火灾场 钢筋混凝土梁 弹性区 塑性区 极限承载力 等效楼面活荷载 

分 类 号：TU312[建筑科学—结构工程]