Method for calculating cumulative displacement damage of curved bridge girder under action of automobile load

The invention discloses a method for calculating cumulative displacement damage of a curved bridge girder under action of an automobile load, and relates to the technical field of highway engineering.The method comprises the following steps: obtaining radial displacement B generated by a curve bridge girder under the action of each automobile load; obtaining the radial displacement recovery b ofthe curve bridge girder when the automobile load effect disappears each time; obtaining the number n of automobile loads of the curve bridge girder; calculating the accumulated radial displacement ofthe main beam of the curve bridge, yn = 2000 (1.0005 -1) (1.264-b), b