竖向接缝对连续刚构桥后期挠度的影响

结合设计与施工因素讨论连续刚构桥竖向接缝对成桥后期挠度的影响,同时分析了不同施工质量下竖向接缝剪切徐变对后期挠度的贡献,认为在现有条件下由竖向接缝处的剪切变形引起主梁下挠增量不容忽视,并提出了改善主梁节段间接缝的构造措施和施工中应注意的事项。

Influence of Vertical Joints on the Post-Construction Deflection of Continuous Rigid Frame Bridges

The influence of vertical joints on post-construction deflection of continuous rigid frame bridges is discussed with the consideration of the design and construction condition.At the same time,the contribution of vertical shearing distortion to the later deflection under different construction conditions is analyzed.In the current case,the increments of the deflection of the bridge main girders resulting from the shearing creep of the vertical joints should not be neglected.At last,the configuration and construction measures are proposed to improve the quality of the segmental vertical joints of the main girders.