at present, crack phenomenon always appears in long span prestressed concrete continuous beam bridges used, the reason of which is that the structure prestressed loss is estimated lower.
目前,在部分已建成运营的大跨度预应力混凝土连续梁桥的不同部位出现了不同程度的开裂现象,多数是由于施工时对结构预应力损失估计不足所造成的。