工字梁剪切承载力的非线性有限元计算

A NONLINEAR FINITE ELEMENT MODEL FOR THE ULTIMATE SHEAR LOAD OF I-SHAPED GIRDERS

本文研究钢板梁剪切承载力问题的特点和国内外的研究现状及存在问题。提供了用ADINA模拟工字梁,由加载至丧失承载力全过程的非线性有限元计算模式和具体做法。该法已用于50多根工字梁的计算,较好地反映了翼缘、横肋等各种因素对剪切承载力的影响。计算结果与试验值能很好吻合。该法为比较、修正国内外现有计算公式,在我国的设计规范中引入这一内容打下了基础。

This paper studies the characteristics of the ultimate shearload on I--shaped girders and presents a nonlinear finite element modelto trace, using the ADINA, the whole process from the beginning ofloading to the collapse of the girder. Allowing for the influence offlange rigidity, transverse stiffeners, initial web deflection, etc, themodel has been well tested by more than 50 numerical examples of I--sha-ped girders.