Thin-walled box girder is often used in modern bridge engineering. However, there is shear-lag effect in thin-walled box girder when thin-walled box girder is bent in the longitudinal direction. If neglect the shear-lag effect, it will cause the insecurity of design work of construction. Recent years, some scholars have done some studies and discusses about shear lag, but there are many problem.
This thesis expatiates the conception of the shear-lag effect about thin-walled box girder and its di...