METHOD FOR MODULATION OF BENDING MOMENT ALONG INFLUENCE LINES OF PRE-STRESSED STEEL-CONCRETE COMPOSITE BRIDGE

Disclosed is a method for manufacturing a pre-stressed steel-concrete composite bridge, comprising: erecting piers and a steel girder (1) mounted on the piers, the piers serving as the fulcra (A, B, C, D) of the steel girder (1); calculating the most detrimental live load position and the size of the live load at this position according to the negative bending moment influence line of the fulcra; pouring positive bending moment region concrete (4) at the positive bending moment region of the steel girder (1), and leaving a negative bending moment region (7) on the steel girder (1); arranging a pre-compression counterweight (5) on the positive bending moment region concrete (4), the position and size of the pre-compression counterweight (5) being the same as the most detrimentally positioned live load; pouring negative bending moment region concrete at the negative bending moment region (7), the negative bending moment region concrete being steel fibre expanded concrete (6); and removing the pre-compression co