A wind energy installation comprising a support structure, wherein the support structure comprises at least one structural component (1, 20) having at least one fastening portion and at least one reinforcing element, - wherein the structural component (1, 20) comprises a plurality of fastening recesses (4A, 4B), which are provided for fastening an operating means, - wherein the structural component (1, 20) is at least partially dynamically loaded during operation of the wind energy installation and at least one fastening recess (4A, 4B) is located in an area that is dynamically loaded during operation of the wind energy installation, - wherein the structural component (1, 20) is constructed for fastening an operating means for the performance of maintenance work and / or during the performance of maintenance work, wherein the operating means is a maintenance device, an auxiliary maintenance means, a lifting device or a support device which is constructed so as to support one or more parts of the wind energy installation, and - wherein the wind energy installation can be operated in at least two states, wherein a first state is an operating state, and a second state is a maintenance state, - wherein, in the operating state, the reinforcing element is screwed to the fastening portion of the structural component (1, 20) by means of screw connections (5A, 5B) which are pre-stressed in a defined manner and which comprise screw fastening means (6A, 6B) which are introduced into at least a portion of the fastening recesses (4A, 4B) which are provided for fastening an operating means, and - wherein, in the maintenance state, the screw connections (5A, 5B) are loosened, and the reinforcing element is removed from the structural component (1, 20) of the support structure, and an operating means can be connected to the fastening portion of the structural component (1, 20) via the fastening recesses (4A, 4B) which are provided for fastening an operating means. - wherein the structural component (1, 20) comprises a plurality of fastening recesses (4A, 4B), which are provided for fastening an operating means, - wherein the structural component (1, 20) is at least partially dynamically loaded during operation of the wind energy installation and at least one fastening recess (4A, 4B) is located in an area that is dynamically loaded during operation of the wind energy installation, - wherein the structural component (1, 20) is constructed for fastening an operating means for the performance of maintenance work and / or during the performance of maintenance work, wherein the operating means is a maintenance device, an auxiliary maintenance means, a lifting device or a support device which is constructed so as to support one or more parts of the wind energy installation, and - wherein the wind energy installation can be operated in at least two states, wherein a first state is an operating state, and a second state is a maintenance state, - wherein, in the operating state, the reinforcing element is screwed to the fastening portion of the structural component (1, 20) by means of screw connections (5A, 5B) which are pre-stressed in a defined manner and which comprise screw fastening means (6A, 6B) which are introduced into at least a portion of the fastening recesses (4A, 4B) which are provided for fastening an operating means, and - wherein, in the maintenance state, the screw connections (5A, 5B) are loosened, and the reinforcing element is removed from the structural component (1, 20) of the support structure, and an operating means can be connected to the fastening portion of the structural component (1, 20) via the fastening recesses (4A, 4B) which are provided for fastening an operating means. - wherein, in the operating state, the reinforcing element is screwed to the fastening portion of the structural component (1, 20) by means of screw connections (5A, 5B) which are pre-stressed in a defined manner and which comprise screw fastening means (6A, 6B) which are introduced into at least a portion of the fastening recesses (4A, 4B) which are provided for fastening an operating means, and - wherein, in the maintenance state, the screw connections (5A, 5B) are loosened, and the reinforcing element is removed from the structural component (1, 20) of the support structure, and an operating means can be connected to the fastening portion of the structural component (1, 20) via the fastening recesses (4A, 4B) which are provided for fastening an operating means.