1, improve the compressive strength of concrete.
2. Improve the ductility of the structure.
3, improve th
1, improve the compressive strength of concrete.
2. Improve the ductility of the structure.
3, improve the shear capacity of components.
4, improve the torsional capacity of components.
5. Main structural requirements: the ratio of stirrup spacing s to longitudinal reinforcement diameter d, s/d, is related to the axial compression ratio of special-shaped columns. The stirrup structural requirements are formulated with reference to the relevant provisions of rectangular columns in Code for Design of Concrete (GBJ 10-89), and the torsion stirrups should be closed around the section; The hook lap form of torsion stirrup should be.
6. Torsional longitudinal reinforcement should be symmetrically and evenly arranged along the periphery of the section; Torsional longitudinal reinforcement spacing should not be greater than 200mm and beam section width; Torsional longitudinal reinforcement must be set at the four corners of the section; The length of twisted longitudinal reinforcement extending into the bearing shall be regarded as tensile reinforcement with full strength.