A fire protection device for a structural cable is proposed including taught metal reinforcements (32) and having a first stretch (41), a second stretch (42) and a connection zone (40) of a collar (30) located between the first and second stretches. The fire protection device comprises a protective mat (34) surrounding the structural cable (16) in the first and second stretches (41, 42) and interrupted in the connection zone (40), and a thermally insulating ring (36) more rigid than the protective mat (34), arranged between the reinforcements (32) and the collar (30) in the connection zone (40) and cooperating with the protective mat in order to provide the reinforcements with a continuous thermal protection along the first stretch (41), of the connection zone (40) and of the second stretch (42).

A fire protection device for a structural cable is proposed including taught metal reinforcements (32) and having a first stretch (41), a second stretch (42) and a connection zone (40) of a collar (30) located between the first and second stretches. The fire protection device comprises a protective mat (34) surrounding the structural cable (16) in the first and second stretches (41, 42) and interrupted in the connection zone (40), and a thermally insulating ring (36) more rigid than the protective mat (34), arranged between the reinforcements (32) and the collar (30) in the connection zone (40) and cooperating with the protective mat in order to provide the reinforcements with a continuous thermal protection along the first stretch (41), of the connection zone (40) and of the second stretch (42).

A method for fabricating a steel wire cable having a ZnAl alloy plating, the method including: arranging steel wires according to an arrangement rule at a cross section of the steel wire cable; controlling a length of the overall cable by a length of a central standard wire; twisting a bunch of the steel wires comprising a zinc-aluminum alloy plating with a torsion angle of between 2 and 4; wrapping the steel wire bunch with a polyester wrapping bandage and covering a resulting product with a double-layered protective polyethylene sheath; anchoring the two ends of the steel wire cable by anchors using fillers; and coiling the finished-product of the steel wire cables.

A long-service-life PWS cable with replaceable sleeve and shielding gas. It consists of wire strands, wrapping tape covering the wire strands, and a sheath arranged outside the wire strands, and is characterized in that the sheath is covered with an outer protective sleeve and shielding gas is filled between the wires in the wire strands. The wire strands of the present invention is completely under protection in a shielding gas environment which effectively avoids the corrosion of the wire strands; the protective sleeve outside the sheath of the PWS cable is a replaceable segmented and fragmented sleeve structure, which is convenient to be replaced and installed, substantially prolonging the service life of the PWS cable system with great promotional value achieved.

A long-service-life PWS cable with replaceable sleeve and shielding gas. It consists of wire strands, wrapping tape covering the wire strands, and a sheath arranged outside the wire strands, and is characterized in that the sheath is covered with an outer protective sleeve and shielding gas is filled between the wires in the wire strands. The wire strands of the present invention is completely under protection in a shielding gas environment which effectively avoids the corrosion of the wire strands; the protective sleeve outside the sheath of the PWS cable is a replaceable segmented and fragmented sleeve structure, which is convenient to be replaced and installed, substantially prolonging the service life of the PWS cable system with great promotional value achieved.

Device for damping vibrations of a cable (8).

The device comprises: a support (14), at least one first damper (16) to dampen the vibrations of the cable (8), the first damper (16) comprising a first element (32) and a second element (34), telescopically moveable, one over the other, the second element (34) being intended to be fixed to the cable (8), the first element (32) having a distal end and a proximal end in relation to the cable (8), and a fixing disposed on the support to fix the first damper (16) to the support (14), the fixing being fixed to the first damper (16) at a place along the first damper located away from the distal end of the first element (32) in the direction of the proximal end.

Device for damping vibrations of a cable (8).

The device comprises: a support (14), at least one first damper (16) to dampen the vibrations of the cable (8), the first damper (16) comprising a first element (32) and a second element (34), telescopically moveable, one over the other, the second element (34) being intended to be fixed to the cable (8), the first element (32) having a distal end and a proximal end in relation to the cable (8), and a fixing disposed on the support to fix the first damper (16) to the support (14), the fixing being fixed to the first damper (16) at a place along the first damper located away from the distal end of the first element (32) in the direction of the proximal end.

The invention relates to a method for transforming a cable supported bridge from a first bridge state in which at least one of said stay cables extends according to a first catenary to a second bridge state in which said at least one stay cable or at least one new stay cable replacing said at least one stay cable extends according to a second catenary, comprising at least one of the steps of a) providing at a predetermined position of said bridge deck a further anchorage for an end of said at least one stay cable previously received and held by said bridge deck side anchorage or for an end of at least one new stay cable, and b) displacing an anchor unit of said bridge deck side anchorage or said further anchorage relative to an allocated fastening unit of said bridge deck side anchorage or said further anchorage to said predetermined position,
said predetermined position being located closer to or further away from a support structure od said cable supported bridge than said bridge deck side anchorage or said anchor unit of said bridge deck side anchorage or said further anchorage, respectively, and being determined such that a tangent to the second catenary of said at least one stay cable or said at least one new stay cable at an entrance to said anchor unit of a support structure side anchorage is substantially parallel to an axis of a recess pipe of said anchor unit of said support structure side anchorage.

The invention relates to a method for transforming a cable supported bridge from a first bridge state in which at least one of said stay cables extends according to a first catenary to a second bridge state in which said at least one stay cable or at least one new stay cable replacing said at least one stay cable extends according to a second catenary, comprising at least one of the steps of a) providing at a predetermined position of said bridge deck a further anchorage for an end of said at least one stay cable previously received and held by said bridge deck side anchorage or for an end of at least one new stay cable, and b) displacing an anchor unit of said bridge deck side anchorage or said further anchorage relative to an allocated fastening unit of said bridge deck side anchorage or said further anchorage to said predetermined position,
said predetermined position being located closer to or further away from a support structure od said cable supported bridge than said bridge deck side anchorage or said anchor unit of said bridge deck side anchorage or said further anchorage, respectively, and being determined such that a tangent to the second catenary of said at least one stay cable or said at least one new stay cable at an entrance to said anchor unit of a support structure side anchorage is substantially parallel to an axis of a recess pipe of said anchor unit of said support structure side anchorage.

A method of damping the vibrations of at least one pair of stay cables of a civil engineering structure, in which the stay cables of said pair are linked by a damper having a first stiffness in response to tensile stress and a second stiffness in response to compressive stress, the first stiffness being greater than the second stiffness.