针对整体式桥台的曲线箱梁固有的力学特性,建立有限元模型,对在不同荷载作用下剪滞系数的横向和纵向分布规律进行研究,并将结果与普通简支曲线箱梁进行比较。通过有机玻璃模型试验验证了有限元建模分析的可行性、准确性,同时做了参数分析,提出了供工程设计参考的实用剪滞系数计算图表。分析结果表明:该类箱梁剪滞分布与普通简支曲线箱梁的不同,主要在于剪滞系数内侧大而外侧小,以及在桥台附近截面出现了负剪滞现象;整体式桥台的等代桩长、桥台纵向抗弯刚度、宽跨比及箱梁肋板间距等,是影响该类桥梁剪滞系数的主要因素。 Aiming at the inherent mechanical properties of the curved box girder with integral abutment, the finite element model is established. The horizontal and vertical distribution laws of shear lag coefficient under different loads are studied. The results are compared with those of ordinary simply supported curved box girders. Through the plexiglass model test, the feasibility and accuracy of the finite element analysis were verified. At the same time, the parameter analysis was done and the calculation formula of the practical shear lag coefficient for engineering design was put forward. The analysis results show that the shear lag distribution of the box girder is different from that of the ordinary simply supported curved box girder. The main reason is that the inside and outside of the shearing lag are small, and the negative shear lag occurs in the section near the abutment. The length of equivalent pile, the longitudinal bending stiffness of bridge abutment, the span ratio and the rib spacing of box girder are the main factors affecting the shear lag coefficient of such bridges.