FLEXURAL BEHAVIOR OF ULTRA HIGH PERFORMANCE FIBER REINFORCED CONCRETE 50M COMPOSITE BOX GIRDER
This paper presents the study of flexural behavior of UHPFRC post-tensioned composite 50 m box girder.The UHPFRC 50 m post-tensioned composite box girder has 1.5% steel fiber of volume fraction.The flexural behavior test carried out on UHPFRC post-tensioned composite box girder which has 135 MPa compressive strength and 50 m length.The post-tensioned UHPFRC composite girder consisted of three segments of UHPFRC U-girder, UHPFRC deck plate and High Strength Concrete reinforced slab.Prestress tendons were included in upper and lower flange.The feature of UHPFRC composite box girder which has been designed no reinforcement bars in mid section of girder.Only two edge segments had been reinforced at edge section for protecting and anchorage tendons along 2 m length.During the test the acquisition of measurement data was conducted on load-deflection response, longitudinal strain profile of concrete, digital image correlation investigation at mid span of girder and smart tendon investigation.The flexural test was carried out when load was reached at 5000 KN.Until 5000 KN load level, the UHPFRC composite box girder did not show ultimate failure status.The load capacity of experimental result was compared to load capacities which were calculated by analytically at SLS and ULS.The experimental result have shown good flexural behavior and ductility.
Composite girder Post-tensioned tendon Deflection Longitudinal strain Crack
Tsas-Orgilmaa Makhbal Sang-Mook Han Do-Hyun Kim Min-Seon-Jeong
Kumoh National Institute of Technology, Gumi, Korea CRD LTD, Gumi, Korea
国际会议
福州
英文
777-790
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）