Method and apparatus for strengthening/restoring a reinforced/prestressed concrete structure
AssigneeLeonhardt, Andra und Partner Beratende Ingenieure GmbH
InventorsMarkus Maier, Dieter Sandner, Hans-Peter Andra
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Abstract
A reinforced or prestressed concrete structure is strengthened and/or restored by attaching a strip-shaped tensional member thereto. Prior to attaching the tensional member, a central portion thereof is prestressed. Then, the tensioned central portion is bonded to a concrete surface of the concrete structure by a first adhesive having a high deformation modulus. Thereafter, the non-prestressed end portions of the tensional member are bonded to the concrete surface by a second adhesive having a low deformation modulus, whereby the second adhesive is substantially less deformable than the first adhesive.
Claims12
A method for strengthening/restoring a reinforced/prestressed concrete structure, comprising the steps of:
- A) prestressing a middle portion of a length of a strip-shaped tensional member;
- B) joining the prestressed middle portion to a concrete surface of the concrete structure by a first bonding agent having a first deformation modulus;
- and
- C) joining two non-prestressed end portions of the tensional member to the concrete surface by a second bonding agent having a second deformation modulus substantially lower than the first deformation modulus.
A reinforced/prestressed concrete structure in combination with a strip-shaped tensional member joined thereto to strengthen/restore the concrete structure;
- the tensional member including a middle portion, and two end portions disposed on opposite sides of the tensional member;
- the tensional member being prestressed only in the middle portion thereof;
- the prestressed middle portion being joined to a concrete surface of the concrete structure by a first bonding agent, the end portions being joined to the concrete surface by a second bonding agent, the second bonding agent having a lower deformation modulus than the first bonding agent.
Dependencies are inferred from the claim text.