An offshore structure (1) with tubular braces (110) that are joined by joints (125) at nodes (120). The tubular braces (110) may be made of steel. The joint (125) is formed by means of casted concrete or grout in a receiving joint volume (150) in one or both of the braces (110). Also disclosed is a a keel structure formed by braces (110) and joints (125) as outlined and a combination of a wind turbine and such offshore structure (1).

An offshore structure (1) with tubular braces (110) that are joined by joints (125) at nodes (120). The tubular braces (110) may be made of steel. The joint (125) is formed by means of casted concrete or grout in a receiving joint volume (150) in one or both of the braces (110). Also disclosed is a a keel structure formed by braces (110) and joints (125) as outlined and a combination of a wind turbine and such offshore structure (1).

A floating platform (1) to support offshore structures intended to generate electricity, this platform comprising a load-bearing support base (2) made of concrete and defining a longitudinal axis (L), this support base (2) being provided with three vertices (3, 4, 5) and an intermediate point (6) located near its geometric center; a plurality of vertical bodies (8) made of concrete which extend from the support base (5) at said vertices (3, 4, 5) and at the intermediate point (6). A vertex (3) of the load-bearing support base (2) is arranged in a longitudinally forward position with respect to the other two vertices (3, 4) and the load-bearing support base (2) comprises a pair of main connection arms (18) suited to directly connect the vertex (3) in a longitudinally forward position with respect to the other two vertices (3, 4) so as to define a substantially arrow-like shape in plan view. A method for the construction of a floating platform (1) to support offshore structures intended to generate electricity.

A floating platform (1) to support offshore structures intended to generate electricity, this platform comprising a load-bearing support base (2) made of concrete and defining a longitudinal axis (L), this support base (2) being provided with three vertices (3, 4, 5) and an intermediate point (6) located near its geometric center; a plurality of vertical bodies (8) made of concrete which extend from the support base (5) at said vertices (3, 4, 5) and at the intermediate point (6). A vertex (3) of the load-bearing support base (2) is arranged in a longitudinally forward position with respect to the other two vertices (3, 4) and the load-bearing support base (2) comprises a pair of main connection arms (18) suited to directly connect the vertex (3) in a longitudinally forward position with respect to the other two vertices (3, 4) so as to define a substantially arrow-like shape in plan view. A method for the construction of a floating platform (1) to support offshore structures intended to generate electricity.