钢-混凝土简支组合梁塑性阶段有效宽度分析  

Plastic analysis of effective composite beam width

作　　者：聂建国[1] 田春雨[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《铁道科学与工程学报》2004年第1期39-43,共5页Journal of Railway Science and Engineering

基　　金：国家杰出青年基金资助项目(50025822)

摘　　要：钢-混凝土组合梁在竖向荷载作用下,翼级板中存在剪力滞后现象,设计中普遍采用翼缘有效宽度的概念。针对有端横梁的单向简支组合梁板体系,采用非线性有限元方法,分析了全过程中翼缘有效宽度的变化,并对塑性极限阶段有效宽度的主要影响因素,包括宽跨比、荷载类型、剪力连接程度、钢梁和混凝土强度等进行参数分析,提出计算塑性极限阶段有效宽度的简化公式。Effective width is usually adopted in design to overcome the difficulty owing to shear lagphenomenon in concrete flange of composite beam under bending loads. The nonlinear finite element method is used to analyze the effective width of composite beams with transverse girders at the end of the main girders. Some dominant parameters are analyzed on the influence of effective width of concrete flange at plastic stage and simplified formulae for effective width at ultimate load are proposed.

关 键 词：桥梁工程 单向组合梁-板体系 塑性阶段有效宽度 非线性有限元分析 简化公式 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]