箱梁腹板斜裂缝的抗剪加固设计

Design for Shear-Resisting Teinforcement for Oblique Crack of Box Web

一座预应力连续箱梁在运营车辆荷载的作用下,产生了较明显的多条斜向超限裂缝,经详细检算分析出产生的原因,采用了箱梁内部增设体外预应力束及竖向预应力钢筋的方法,进行了有针对性的抗剪加固设计,保证了运营期间结构的安全性和耐久性。

Under the action of running vehicle load the prestressed continuous box produces obvious, multiple, diagonal and transfinite cracks. Through particular checking computation the its production reasons have been analyzed. So Shear - resistance reinforcing design is made by the method that setting up the external prestressed bundied bars and the vertical prestressed reinforcements within the box beam, having guaratteed the safety and durability in structure during running.