Experimental study on load bearing capacity of short-connection type bolts subjected to shear and bending

Abstract

Transverse load due to flooding drifts the superstructure of bridges and breaks the bearing side blocks, which can be a trigger of bridge washout damage. The transverse load on the side block causes shear forces and bending moments to the connecting bolts of short-connection joint type. However, the load bearing capacities and breaks of the bolts subjected to those forces are not clear, since these bolts are usually not designed to resist the transverse load action.

Then in this study, loading tests of the bolt under shear, shear and bending are carried out. The test results revealed that when shear and bending act simultaneously on the bolt, the thread fails and the greater the bending effect, the lower the ultimate strength and the greater the displacement at failure.