Fig 1.
The application of prefabricated columns in practical engineering [20].
Table 1.
Design parameters of prefabricated column.
Table 2.
Basic mechanical properties of materials.
Fig 2.
Joint design diagram of prefabricated column [20,21].
(a) Prefabricated column joint diagram. (b) Reinforcement diagram of prefabricated column.
Table 3.
Specimen in different stages of bearing capacity and displacement value [20].
Fig 3.
Schematic flow of the removing column method.
(a) Initial state of structure. (b) Equivalent static model. (c) Remove the load process.
Fig 4.
Stiffness values of prefabricated column joints in different failure stages.
Fig 5.
Schematic diagram of the prefabricated joint model.
Fig 6.
(a) Test loading [20,21]. (b) Finite element model loading diagram.
Fig 7.
Column-column joint hysteretic curve verification [20,21].
(a) PRCC-W01. (b) PRCC-W02. (c) PRCC-W03. (d) PRCC-W04.
Fig 8.
Six story PRCS and CPCS diagram.
(a) Structural plan. (b) Structural elevation.
Fig 9.
Bending moment and angle curve of plastic hinge.
Note: Point A in this figure is the initial point; point B is the yield point, and point C is the ultimate bearing capacity; D point is the residual strength; IO, LS and CP represent direct use, life safety and collapse prevention respectively.
Table 4.
Structural response after removal of B-1 column.
Fig 10.
The force change of the structure after removing the A-1 column.
(a) Displacement time history after removal of A-1 column. (b) Axial force time history curve of A-2 column.
Fig 11.
The force change of the structure after removing the B-1 column.
(a) Displacement time history after removal of B-1 column. (b) Axial force time history curve of B-2 column.
Fig 12.
The force change of the structure after removing the A-4 column.
(a) Displacement time history after removal of A-4 column. (b) The axial force time history curve of A-5 columns.
Fig 13.
The force change of the structure after removing the B-4 column.
(a) Displacement time history after removal of B-4 column. (b) The axial force time history curve of B-5 columns.
Table 5.
Structural response after removal of B-4 column.
Fig 14.
Pushdown loading diagram.
Fig 15.
Pushdown curve of PRCS and CPCS.
(a) Removal of A-1 column. (b) Removal of A-4 column. (c) Removal of B-1 column. (d) Removal of B-4 column.
Table 6.
Comparison of bearing capacity of PRCS and CPCS under beam mechanism and catenary mechanism.
Fig 16.
Plastic hinge distribution at collapse stage under B-4 column removal scenario.
(a) Displacement cloud map when CPCS collapses. (b) Displacement cloud map when PRCS collapses.
Table 7.
Residual yield strength of materials under different corrosion damage.
Fig 17.
Pushdown curve evolution process of structure considering corrosion damage.
(a) Removal of B-1 column in different service periods. (b) Removal of A-1 column in different service periods.