Gravity Load Collapse Behavior of Nonengineered Reinforced Concrete Columns

摘要: This paper aims at investigating gravity load collapse behavior of extremely poor quality reinforced concrete columns under cyclic loading. Such were usually constructed by local people and may not be designed to meet any the standards. It was found that their strength as low 5 MPa amount longitudinal reinforcement lower than 1%. type column is deliberately defined “nonengineered column,” or NRCC. During earthquake, NRCC caused a large number death tolls around world. In this study, four representative existing tested The compressive in order used with concrete. Two axial levels 6 18 tons study influence level on maximum drift collapse. To investigate effect bar types capacity, 9 mm round bars two specimens 12 mm deformed for rest specimens. before very dependent level. subjected high (18 tons) approximately 1.75% drifts. use (associated larger reinforcement) damage severely dissipate all over height columns. compared those using bars. Finally, plastic hinge model predict overly underestimates