曲线U型钢腹板组合箱梁剪力滞效应研究

来源 :沈阳建筑大学学报(自然科学版) | 被引量 : 0次 | 上传用户:dlzshy
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目的 为确定影响曲线U型钢腹板组合箱梁剪力滞效应的主要参数,提出一种计算曲线组合梁剪力滞的求解方法.方法 基于能量原理,同时考虑弯矩耦合和滑移效应的影响,选用抛物线型和余弦函数型位移函数曲线,对已建立的剪力滞控制微分方程和边界条件给出数值计算格式.采用差分法分析各参数的影响.结果 U型钢腹板组合箱梁顶板的应变曲线随剪力滞翘曲位移函数的不同选择差别不大,但底板的应变曲线差别较大.混凝土顶板厚度和强度等级对顶板的有效宽度系数几乎没有影响;有效宽度系数随着滑移刚度的增加而减小,随曲率半径和跨宽比的增加而增加;当悬翼比小于l时,剪力滞效应随悬翼比增加而增加,当悬翼比大于1时则相反.结论 得到组合梁进行不同剪滞翘曲位移下应变曲线规律及各参数对曲线组合梁的影响曲线,为解决曲线组合梁剪力滞问题提供了思路.
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