本文提出的方法是直梁桥荷载横向分配理论中“刚接板法”的推广,它根据曲线梁的特点,提出了等作用半波正弦荷载的概念,并采用了内力横向分配概念。该方法充分考虑了曲线梁横截面构造上可能的不对称性及横截面的弹性变形。文中阐述了开口截面曲线梁桥最大活载内力的计算方法,并附有实桥算例。 The method proposed in this paper is the extension of the “rigid plate method” in the theory of transverse load distribution of straight beam bridges. According to the characteristics of curved beam, the concept of half-wave sinusoidal load is proposed and the concept of lateral force distribution is adopted. The method fully considers the possible asymmetry of the cross-section of the curved beam and the elastic deformation of the cross-section. In this paper, the calculation method of the maximum live load internal force of curve girder with open cross section is expounded, and an example of real bridge is attached.