In the tie girder boxes crack growth was detected near the crack tip . 在系杆箱型梁中裂纹尖端附近检测到裂纹的扩展。
2.
Visual observations showed that a horizontal displacement in the longitudinal direction of the bridge developed between the tie girder and the top flange of the floor beam at the end connection . 肉眼观察表明：在端节点处的系梁和横梁上翼缘之间产生一种沿桥梁纵向的水平位移。
