Find the value of the bending stress and the deflection at the center if the ribs are omitted.
如果略去肋条，求中心处的弯曲应力和挠度之值。
2
By demarcation and picture center handling method, the deflection of the measured section can be caught and calculated.
通过标定及图像中心法处理，可以计算出所测截面的挠度。
3
By analyzing the case of deep excavation of Shanghai Urban Planning Exibition Center, some deflection controlling measures and principles were illustrated by use of the top-down excavation method.