The comparation demonstrated that the relative stiffness of floor system reduced with consideration of confuses soil creep effect, the steel main girder beared greater percentage inner force and its innerstress increased while the inner force of floor system decreased. 3. 结果表明:考虑徐变效应后,桥面板的相对刚度降低,内力重分配时,钢主梁承受更大比例内力,其内力增大,而桥面板内力减少。