A Study on the Flexural Performance of UHPC Precast Deck-Joint Interface by the Exposure of Steel Fiber  

作　　者：Kilje Jung Sung Yong Park Sung Tae Kim Byung-Suk Kim Keunhee Cho 

机构地区：[1]Structural Engineering Research Division, SOC Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, Korea

出　　处：《Engineering（科研）》2014年第13期1000-1006,共7页工程（英文）（1947-3931）

摘　　要：As a solution against the serviceability problem caused by the cracks occurring at the UHPC precast deck-joint interface, this study proposes a method exposing the steel fiber at the interface and evaluates the corresponding flexural performance of the lap spliced construction joint. After having slowed down the strength development of the concrete placed in the joint of the precast deck by means of a curing retardant, the concrete at the interface is crushed so as to expose the steel fibers and the change in the flexural performance is observed experimentally according to the exposure of the steel fibers. The results show that, even if the ultimate strength and stiffness of the UHPC precast deck including the joint are mostly determined by the arrangement details of the rebar lap splice, the exposure of the steel fibers can secure stable ductile behavior and reduce the width of the cracks generated at the precast deck-joint interface under service load.As a solution against the serviceability problem caused by the cracks occurring at the UHPC precast deck-joint interface, this study proposes a method exposing the steel fiber at the interface and evaluates the corresponding flexural performance of the lap spliced construction joint. After having slowed down the strength development of the concrete placed in the joint of the precast deck by means of a curing retardant, the concrete at the interface is crushed so as to expose the steel fibers and the change in the flexural performance is observed experimentally according to the exposure of the steel fibers. The results show that, even if the ultimate strength and stiffness of the UHPC precast deck including the joint are mostly determined by the arrangement details of the rebar lap splice, the exposure of the steel fibers can secure stable ductile behavior and reduce the width of the cracks generated at the precast deck-joint interface under service load.

关 键 词：Ultra-High Performance Concrete PRECAST DECK System Steel Fiber EXPOSURE Lap-Spliced Connection 4-Point BENDING Test 

分 类 号：R73[医药卫生—肿瘤]