Anchorage assembly for a structure, comprising a tendon made of strands, the anchorage assembly defining at least two parts: - a first part with the strands of the end portion of the tendon passed through individual perforations of an anchor head, - a second part with an intermediate portion of the tendon placed within a first tubular member able to receive a removable protective product, wherein said second part is suitable to be placed within a structure, with the strands having said end portion passed through on one hand an opening formed in a bearing plate disposed in an adjacent position to the first tubular member outlet, with said first tubular member outlet and said opening connected to each other, and on the other hand said individual perforations of said anchor head which is placed outside of the front face of the structure, wherein the anchor head has an outside diameter smaller than the diameter of said opening of the bearing plate, wherein it further comprises a removable locking system interposed between said anchor head and said bearing plate, the presence of the locking system preventing thereby the anchor head to enter said opening and said first tubular member outlet, characterized in that said bearing plate is suitable to be disposed within the structure, and characterized in that said anchorage assembly further comprises: - a third part with the running portion of the tendon placed within a second tubular member able to receive a filler compound and within a channel, the outlet of said second tubular member being connected to the inlet of said first tubular member, the inlet of said second tubular member being connected to said channel, wherein said second tubular member and said channel are suitable to be placed within the structure, - an abutment plate forming the inlet of the first tubular member and a sealing block able to be placed within said first tubular member, adjacent to said abutment plate, wherein said strands passing through said sealing block and wherein said sealing block is able to seal the inner space of the first tubular member off from the inner space of the second tubular member to form a seal for said filler compound. - a first part with the strands of the end portion of the tendon passed through individual perforations of an anchor head, - a second part with an intermediate portion of the tendon placed within a first tubular member able to receive a removable protective product, - a third part with the running portion of the tendon placed within a second tubular member able to receive a filler compound and within a channel, the outlet of said second tubular member being connected to the inlet of said first tubular member, the inlet of said second tubular member being connected to said channel, wherein said second tubular member and said channel are suitable to be placed within the structure, - an abutment plate forming the inlet of the first tubular member and a sealing block able to be placed within said first tubular member, adjacent to said abutment plate, wherein said strands passing through said sealing block and wherein said sealing block is able to seal the inner space of the first tubular member off from the inner space of the second tubular member to form a seal for said filler compound.