In this paper, a theoretical calculation method that can be generally applied to responses analysis of irregular bridge span pontoon connected by elastic hinges was proposed based on the elastic foundation beam theory. This method can solve the displacements, rotation angles, bending moments and shear forces of pontoon bridge under vertical static loads. By comparing with the experimental and numerical results in other researches, the correctness and universality of theoretical method are verified. The main response characteristics of the pontoon bridge under vertical static loads are further investigated based on a detailed case study, which contrasts the results of three methods including the theoretical method in this paper, AQWA software and FEM. The results reveal that the rotation stiffness of elastic hinges has a great influence on the responses of the pontoon bridge. The elastic deformation of the pontoon units can be ignored when the rotation stiffness of hinges is small, while it needs to be considered seriously when the rotation stiffness of hinges reaches a certain value. Besides, the flexural rigidity of pontoon bridge also has a sensitive influence on the numerical results. The theoretical method can provide for the optimal design of the pontoon bridge and has significant engineering application prospects.

提出了一种基于弹性地基梁理论的理论计算方法，该方法可以普遍应用于弹性铰链连接的不规则桥跨浮桥的响应分析。该方法可以解决浮桥在垂直静载荷作用下的位移，旋转角度，弯矩和剪力。通过与其他研究的实验结果和数值结果进行比较，验证了理论方法的正确性和普遍性。在详细的案例研究的基础上，进一步研究了浮桥在垂直静载荷下的主要响应特性，与本文中的理论方法，AQWA软件和FEM三种方法的结果进行了对比。结果表明，弹性铰链的旋转刚度对浮桥的响应有很大的影响。当铰链的转动刚度较小时，可以忽略浮筒单元的弹性变形，而当铰链的转动刚度达到一定值时，则需要认真考虑。此外，浮桥的抗弯刚度对数值结果也有敏感的影响。该理论方法可以为浮桥的优化设计提供参考，具有重要的工程应用前景。浮桥的抗弯刚度对数值结果也有敏感的影响。该理论方法可以为浮桥的优化设计提供参考，具有重要的工程应用前景。浮桥的抗弯刚度对数值结果也有敏感的影响。该理论方法可以为浮桥的优化设计提供参考，具有重要的工程应用前景。