Method for determining initial yield bending moment of section of bridge pile foundation

The invention relates to the technical field of bridge construction engineering, in particular to a method for determining the initial yield bending moment of the section of a bridge pile foundation. The method comprises the following steps of selecting a plurality of pile foundations with different pile diameters and different section reinforcement ratios, calculating the section initial yield bending moment of each pile foundation under the action of different axial forces, taking the pile diameter, the section reinforcement ratio, all the axial forces and the corresponding section initial yield bending moment of one pile foundation as a set of sampling data, and obtaining a plurality of sets of sampling data; dividing each group of sampling data into a small eccentric section and a large eccentric section; fitting the calculation data of all the small eccentric sections and the calculation data of all the large eccentric sections, and determining a small eccentric section fitting equation and a large eccen