JPKIC 结构设计原理 Theprinepletstrmicturgdesign 6.1 with a longitudinal axis of the stirrup steel bar and the general com pression member 1.Classification of reinforced concrete columns Ordinary hoops column:longitudinal reinforcement and stirrups with the column,(Figure 6-1a). oSpiral hoop column:with a longitudinal reinforcement and spiral reinforcement rings or bars welded column,(Figure 6-1b). Of which:to help compression longitudinal reinforcement,bending away from the commitment to prevent brittle failure.Spiral reinforcement component to improve strength and ductility.§ 6.1 with a longitudinal axis of the stirrup steel bar and the general compression member 1.Classification of reinforced concrete columns ⚫ Ordinary hoops column: longitudinal reinforcement and stirrups with the column, (Figure 6-1a). ⚫ Spiral hoop column: with a longitudinal reinforcement and spiral reinforcement rings or bars welded column, (Figure 6-1b). Of which: to help compression longitudinal reinforcement, bending away from the commitment to prevent brittle failure. Spiral reinforcement component to improve strength and ductility