箱形薄壁结构在翘曲扭转下的截面非线性分析

Cross-Section Nonlinear Analysis of Reinforced Concrete Box Girder Thin-walled Composite under Warping Torsion

针对广泛应有于公路行业的钢筋混凝土薄壁构件,本文详细地推导了其在翘曲扭转作用下的截面应力和截面力的具体表达式;综合考虑了混凝土和钢筋对截面整体刚度矩阵的贡献,进一步推导了在翘曲扭转作用下钢筋混凝土薄壁结构截面非线性分析的表达式,对翘曲变形产生的纵向应力采用了有效的研究分析手段。

In this paper,the thin-walled structure which widely used in the highway area is studied,and the specific expression of sectional stress and force of reinforced concrete thin-walled member under warping torsion is derived in detail.The contribution of the concrete and reinforcing bar to the sectional integral stiffness matrix is considered,and the expression of section nonlinear of RC thin-walled structure under warping torsion is further deduced.It gives an effective analysis method of warping vertical stress.