MINIMUM STIRRUP CHAＲACTERISTIC VALUES OF HSC COLUMNS CONFINED WITH HIGH-STRENGTH STIRRUPS

Based on a large number of test results at home and abroad，through theoretical analysis and experimental research，the relationship among the limiting displacement drift，the ductility of HSC columns and axial compression ratio，confining reinforcement characteristic values，the cover area as well as longitudinal reinforcement ratio was set up; the design formula for calculating the confining reinforcement and the minimum confining reinforcement characteristic values of HSC columns at different seismic levels were proposed． By way of comparison，it was indicated that the amount of stirrup ratio calculated by proposed design method was higher than current standards and ACI 318 － 05 standards，but lower than CSA A23. 3 － 04 and NZS 3101 standards．