Ductile hybrid structural fabric

A structural fabric comprising:

• a plurality of axial fibers including a first fiber having an ultimate strain and a second fiber having an ultimate strain greater than said ultimate strain of said first fiber;
• and
• a plurality of first diagonal fibers braided with the axial fibers and oriented at a first braid angle relative to said axial fibers.

A concrete beam strengthened with a structural fabric, said beam comprising:

• a concrete beam having an outer surface;
• reinforcing steel embedded in the concrete beam, said reinforcing steel having a yield strain;
• a structural fabric coupled to the outer surface of the beam, said structural fabric including a first fiber having an ultimate strain and a second fiber having an ultimate strain greater than the ultimate strain of the first fiber, said second fiber being in the same plane as and parallel to said first fiber.