火灾下型钢混凝土梁力学性能的研究  

RESEARCH ON BEHAVIOR OF STEEL REINFORCED CONCRETE (SRC) BEAMS IN FIRE

作　　者：郑永乾[1] 韩林海[2] 经建生[3] 

机构地区：[1]福建工程学院土木系,福州350007 [2]清华大学土木工程系,北京100084 [3]公安部天津消防科学研究所,天津300381

出　　处：《工程力学》2008年第9期118-125,148,共9页Engineering Mechanics

基　　金：国家重点基础研究专项课题<火灾动力学演化与防治技术>基金项目(2001CB40960306)

摘　　要：采用纤维模型法和有限元软件ABAQUS计算了火灾下型钢混凝土梁的变形以及耐火极限,初步了解了型钢混凝土梁的高温力学性能。在此基础上,利用纤维模型法分析了截面尺寸、截面含钢率、受拉钢筋配筋率、型钢屈服强度、钢筋屈服强度、混凝土强度、截面高宽比和钢筋的混凝土保护层厚度等参数对火灾下构件承载力的影响规律,最后提出了型钢混凝土梁耐火极限的实用计算公式。The fiber model method and finite element software ABAQUS are applied to calculate the deformation of steel reinforced concrete （SRC） beams under fire and fire resistance. The fire performance of steel reinforced concrete beams is obtained. Using the fiber model method, influences of the＇parameters, such as section dimensions, steel ratio, tensile reinforcement ratio, strength of steel section and reinforcement, concrete strength, section depth-to-width ratio and protection thickness of concrete to reinforcement on bearing capacity under fire are analyzed. A simplified model is developed for calculating the fire resistance of steel reinforced concrete beams.

关 键 词：型钢混凝土 梁 力学性能 温度场 耐火极限 抗火设计 

分 类 号：TU398.9[建筑科学—结构工程]