IPKIC 结构设计原理 6.1 with a longitudinal axis of the stirrup steel bar and the genera compression member 2.Failure modes 1)factors: (1)creep: So that the sudden increase of steel stress,concrete stress reduction (stress re-distribution) Sudden unloading of concrete will have tensile stress. (2)The slenderness ratio:(lo/b) 2)Failure of ordinary hoops column (1)short column damage -material damage. Failure characteristics:longitudinal cracks,longitudinal reinforcement muster, concrete crack. (2)destruction of long columns -unstable failure Failure characteristics:first,the concave side was crushed concrete,concrete surface longitudinal cracks;convex side of the pressure suddenly changed from tension,transverse cracks appear;destruction before the horizontal deflection increased rapidly rather sudden destruction come,leading to instability Damage Carrying capacity is less than the same cross section,reinforcement,material columns2. Failure modes 1) factors: (1) creep: ●So that the sudden increase of steel stress, concrete stress reduction (stress re-distribution) ●Sudden unloading of concrete will have tensile stress. (2) The slenderness ratio: (l0/b) 2) Failure of ordinary hoops column (1) short column damage - material damage. Failure characteristics: longitudinal cracks, longitudinal reinforcement muster, concrete crack. (2) destruction of long columns - unstable failure Failure characteristics: first, the concave side was crushed concrete, concrete surface longitudinal cracks; convex side of the pressure suddenly changed from tension, transverse cracks appear; destruction before the horizontal deflection increased rapidly rather sudden destruction come, leading to instability Damage. Carrying capacity is less than the same cross section, reinforcement, material columns. § 6.1 with a longitudinal axis of the stirrup steel bar and the general compression member