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中文摘要：
为研究两端铰接圆弧轴线箱形截面曲梁的平面内整体稳定性能，采用数值方法对其进行了理论研究，采用ABAQUS有限元软件建立了二雏的曲梁模型，模拟曲梁的平面内稳定问题。研究了不同圆心角、不同长细比，以及不同大小的初始几何缺陷时圆弧轴线箱形截面曲梁平面内稳定性能的影响，得到了弹性屈曲系数的数值解与经典理论解的差异和规律，给出了初始几何缺陷对稳定系数和正则化长细比关系曲线的影响，并且计算得到了该形式曲梁的轴力一弯矩关系曲线。提出的圆弧轴线箱形截面曲梁平面内稳定的设计公式可为今后的设计提供理论依据和建议。
英文摘要：
In order to study the in-plane stability performance of the arc axis both ends hinged curved box-girders, numerical method theory was carried out using finite element software ABAQUS. Two-dimensional curved girder models were established to simulate the in-plane stability of curved box-girders. Influences of different central angles, different slenderness ratio, and different initial geometric imperfections on the in-plane stability performances of the curved box girder were considered. The differences and laws of the numerical solution and classic theoretical solution of the elastic buckling factor were gained. Effects on the stability factor and regularization slenderness ratio of the initial geometric imperfections were given, and the form of axial load-moment curve was calculated as well. The design formulae for calculating the in-plane stability of arc axis curved box-girders can provide theoretical basis and suggestions for the future design.
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