Experimental Research on Mechanical Properties of UHPC-RC Composite Columns Under Eccentric Compression
Eight UHPC-RC(ultra-high performance concrete-reinforced concrete)composite columns(including two RC contrast columns)were fabricated by using ultra-high performance concrete(UHPC)to replace certain thickness of ordinary concrete on the tensile zone of reinforced concrete(RC)columns.The influence of eccentricity,UHPC layer thickness and UHPC layers with or without steel bars on cracking performance,ultimate bearing capacity and ductility of composite columns was studied.The results showed that UHPC layers significantly improved the crack resistance of RC columns,delayed the occurrence of cracks to different degrees,and presented the typical multi-cracks on the tensile side of UHPC-RC composite columns.The ultimate bearing capacity and ductility of UHPC-RC composite columns were improved to various extends,with the increase of UHPC layer thickness and combination of UHPC layers and steel reinforcing bars(R-UHPC).The formula of calculating the ultimate bearing capacity of UHPC-RC composite columns was proposed,and it showed a good agreement between the calculated values and the experimental results.
NETL
NSTL
万方数据
维普
