The invention discloses a concrete column strengthening method of a compressive pre-stress steel casing
rebar planting extension cross section. The concrete column strengthening method of the compressive pre-stress steel casing
rebar planting extension cross section comprises the following steps that a steel casing matched with the shape of a
reinforced concrete column is adopted to exert an annular pre-stress on a
rebar concrete column,
radiation rebar is welded on the outer surface of the steel casing and in perpendicular to the outer surface of the steel casing, an annular
stirrup is arranged on the free end of the
radiation rebar, longitudinal bars are vertically welded on the interior of the annular
stirrup in the axial direction of the
reinforced concrete column, finally a template is established outside the annular
stirrup, and concrete is casted. According to the concrete column strengthening method of the compressive pre-stress steel casing rebar planting extending cross section, the original concrete
column structure is not destructed, the pre-stress is exerted on the original structure, and therefore the force sate of original concrete changes from a two-way pre-stress state to a three-way pre-stress state, the
compressive strength of the concrete is improved and then the structure
bearing capacity of the reinforced column is improved; the
ductility performance of the component is greatly improved, the energy-dissipating capacity is greatly improved, and the structure has the excellent anti-seismic property. The concrete column strengthening method of the compressive pre-stress steel casing rebar planting extension cross section is applicable to reinforcing the concrete component in
engineering.