简支组合梁板体系有效宽度分析

EFFECTIVE WIDTHS OF SIMPLY SUPPORTED COMPOSITE BEAMS WITH TRANSVERSE END GIRDERS

有端横梁约束的简支单向组合梁 -板体系在横向荷载作用下 ,由于剪力连接件的约束 ,翼缘板中存在剪力滞后现象。结构体系中 ,端横梁对剪力滞后程度有很大影响。本文采用有限元方法 ,对翼缘有效宽度的主要影响因素进行参数分析 ,其中包括宽跨比、荷载类型、滑移刚度、端横梁约束程度等 ,并拟合出了各种情况下有效宽度的简化计算公式 ,通过与有限元方法及其它计算方法的对比 。

In this paper the rigorous behavior of composite steel-concrete beams system with transverse girders at the end of the main girders is studied. Finite element method is used to the parametrical study and the dominant parameters are analyzed on the influence of effective width of concrete flange. Some regressive formulae for effective width are proposed and they are shown to be validated by comparing the predicted results with those from other methods and investigators.