TURKISH PROGRESS: THE JOINING OF EAST AND WEST

THE PROPOSED BOSPORUS BRIDGE WILL BE THE FOURTH LARGEST SUSPENSION BRIDGE IN THE WORLD, WITH A TOTAL SPAN OF 1,074 MILES. IT WILL LINK CONTINENTAL EUROPEAN AND ASIAN PARTS OF TURKEY. THE BRIDGE SUPERSTRUCTURE USES A CONTINUOUS BOX STIFFENING GIRDER OF AERODYNAMIC CROSS-SECTION. THIS FEATURE, PLUS THE TRIANGULATED SUSPENDER SYSTEM, WILL ALLOW FOR SUBSTANTIAL SAVINGS OVER OTHER DESIGNS OF OPEN TRUSS CONSTRUCTION. THE 25-M WIDE DECK ON TOP OF THE BOX GIRDER WILL CARRY SIX TRAFFIC LANES AND TWO PEDESTRIAN WALKS. THE BOX GIRDERS WILL BE ASSEMBLED IN 18-M LONG UNITS WEIGHING 145 TONS, FLOATED OUT, AND LIFTED ONTO POSITION WITH TACKLE SUPPORTED FROM THE MAIN SUSPENSION CABLES. THE APPROACH VIADUCTS BETWEEN THE ANCHORAGES AND THE TOWERS WILL BE OF COMPOSITE STEEL AND REINFORCED CONCRETE CONSTRUCTION. THE BRIDGE IS DESIGNED TO RESIST EARTHQUAKE BEDROCK ACCELERATION EQUAL TO 0.1 G. PREFORMED PARALLEL WIRE STRANDS ARE BEING USED FOR THE SUSPENDERS. THE HANGERS SUPPORTING THE DECK FROM THE MAIN CABLES WILL BE SINGLE SPIRAL STRANDS OF HIGH TENSILE STEEL WIRE, WITH A MINIMUM BREAKING LOAD OF 280 TONS. THEY ARE PLACED AT AN ANGLE TO THE PERPENDICULAR, WHICH ENABLES THEM TO DAMP HORIZONTAL MOVEMENTS AND ABSORB SOME WIND FORCES. BOTH TOWERS FOR THE BRIDGE ARE LOCATED ON SHORE. THE SINGLE CELL CONSTRUCTION OF THE TOWERS ALLOWS THE INCLUSION OF AN ELEVATOR IN EACH LOWER PORTION. THE BRIDGE IS TO BE A TOLL BRIDGE AND IS EXPECTED TO CARRY SOME 7.5 MILLION VEHICLES BY THE YEAR 1973.

  • Supplemental Notes:
    • Vol 22, No 11, P 52, 1 PHOT
  • Publication Date: 1969-11

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00209109
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 24 1970 12:00AM