连续刚构梁桥薄壁柔性墩身裂缝产生原因

Preliminary research on the cause of the cracks in thin-walled flexible piers of continuous rigid frame bridges

通过调查已建成的连续刚构桥梁的薄壁柔性墩身裂缝分布状况,和对正在施工中的连续刚构桥梁的薄壁柔性墩身进行受力分析,初步得到连续刚构梁桥的薄壁柔性墩墩身裂缝产生的原因.研究表明,墩身在平行于水流方向的两侧面上的竖向裂缝,可能是由于墩身在底部和中间变截面处的倒角附近区域产生较大剪应力而引起的.

Through the investigations on the distribution of cracks in thin-walled flexible piers of built continuous rigid frame bridges, and mechanics analysis on a thin-walled flexible pier of a building continuous rigid frame bridge, the cause of the cracks on the piers is derived preliminarily. The researches show that the vertical cracks on the surfaces paralleled to water flow of thin-walled flexible piers may be induced by the large shear stresses at the faceoffs in the cross-section near the bearing and the variable cross-section of the pier.