Method of suspending bridge-girder of suspension bridge

摘要

PCT No. PCT/JP96/00645 Sec. 371 Date Feb. 18, 1997 Sec. 102(e) Date Feb. 18, 1997 PCT Filed Mar. 13, 1996 PCT Pub. No. WO96/31658 PCT Pub. Date Oct. 10, 1996A method of suspending a bridge-girder of a suspension bridge is provided. The method is characterized in that where the bridge-girder is suspended by main cables supported by main towers through hanger ropes, the central portion of each of a plurality of horizontal beams mounted on each of the main towers in spaced part relationships with one another vertically are connected to the lateral sides of the bridge-girder by means of obliquely extending auxiliary cables 7. According to this suspension method, the torsional natural frequency of the bridge-girder increases so that the flutters and vortex induced oscillation harmful to the bridge-girder are controlled.