Slab, column, beam, wall strengthening

Slab strengthening, column strengthening, beam strengthening, wall strengthening, seismic strengthening.

SLAB STRENGTHENING BY FRP WRAP

Slab strengthening

Cast-in-place slab

 

Prefabricated slab

Externally bonded steel plate, fix chemical anchoring
Externally bonded carbon fiber reinfroced polymer(CFRP wrap)
Newly added cast-in-place slab Post installed rebar + angle steel support, or post installed rebar + shear reinforcement

COLUMN STRENGTHENING BY FRP WRAP

Column strengthening

Insufficient bearing capacity of column compression normal section

Enlargement of cross section, main reinforcement and stirrup

Externally bonded steel plate, steel jacketing

Continuous bonding of carbon fibers along the full length of the ground (circumferential girding)

Insufficient bearing capacity of columns under compression

The fiber direction should be perpendicular to the longitudinal axis of the column.

Insufficient bearing capacity of column large eccentric compression

The fiber direction is aligned with the longitudinal axis of the column

Aseismic reinforcement of the ductility of a column

Circumferential girth of ring bonding fiber composite as an additional stirrup

Normal section reinforcement (water tower, water tank and closed structure) of tensile members

The fiber composite is externally bonded to the concrete surface of the tensile part, and the direction of the fiber is consistent with the tensile direction.

The outer steel plate is on the concrete surface of the tensile part, and the direction of the steel plate is consistent with the direction of the pulled steel bar.

Newly added cast-in-place colum

Main tendons of planting reinforcement + shear reinforcement and stirrup

BEAM STRENGTHENING BY FRP WRAP

Beam strengthening

Lack of bearing capacity of positive bending moment in beam Enlarging column section
Externally bonded steel plate
Externally bonded carbon fiber reinfroced polymer(CFRP wrap)
Steel jacketing
The insufficient bearing capacity of the negative bending moment in the end of the beam Externally bonded steel plate
Externally bonded carbon fiber reinfroced polymer(CFRP wrap)
Pouring the grouting material at the end of the beam with armpit
The insufficient bearing capacity of the shear and oblique section shear in the end of beam Externally bonded steel plate
Externally bonded carbon fiber reinfroced polymer(CFRP wrap)
Steel beef leg
Additional shear reinforcement

 

Seismic strengthening

Deficiency of column ductility Circumferential bonded fiber composites form circumferential girth as additional reinforcement.
Improvement of seismic structure by frame joint Beam end steel plate armpit

 

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