In bridge Nagakata direction of bridge

摘要

PROBLEM TO BE SOLVED: To provide a bridge reinforcing structure and a bridge reinforcing method in an outside cable method preventing excessive axial force from being introduced to a bridge girder and effectively reducing stress applied to the bridge girder by a live load.;SOLUTION: The bridge reinforcing structure includes a cable 13 stretched in the bridge length direction of a bridge 1, and a fulcrum forming member 12 turning the cable. An upward force is applied to the fulcrum forming member by a vertical component F2 of tension F applied to the cable to reduce bending stress of the bridge girder 3. The bridge reinforcing structure includes towers 11 erected on structures 2, 6 outside the bridge girder or on the ground to transmit the tension of the cable to the structures or the ground, and a cable anchoring means 14 anchoring the cable having passed the towers, to the structures or the ground or anchoring the cable to the towers.;COPYRIGHT: (C)2011,JPO&INPIT