Abstract
This study suggests a joint design using an X-brace bar to identify the stability and structural performance of a precast concrete (PC) beam-column joint design, which may cause problems when used in a segmented PC beam system for a long-span structure. For this, an experimental PC beam-column model at half scale was designed and verified for applicability of X-braced bars in a panel zone. While previous studies suggested the development of a long-span structural system using precast concrete (PC) and described the problems with PC beam-column joints, this study proposes a solution to improve the structural stability and performance of a PC beam-column joint design and conducts analytical verification.
Highlights
A precast structural system (PC system) can generally be applied only when the span between columns is less than 15–16 meters because of the limitations of transportation and the capacity of lifting equipment (AHS 2007)
As the load exceeded 60 kN, buckling on the X-braced rebar was observed, and significant shear deformation began in the panel zone
It can be assumed that the vertical displacement on the opposite side became larger due to the buckling of the X-braced rebar with shear deformation in the panel zone
Summary
A precast structural system (PC system) can generally be applied only when the span between columns is less than 15–16 meters because of the limitations of transportation and the capacity of lifting equipment (AHS 2007). To create a PC structural system with a span greater than 17 meters, the total length of the vehicle which transports the PC members from the plant to the construction site should measure less than 17 meters from the vehicle’s front bumper to the rear end of the PC members on board, according to the Road Traffic Act (Korea, Japan, USA, Canada, Germany, England, France: width 2.5~2.6 m, height 2.5~3.0 m, length 14~16 m, weight 20~30 ton). For these reasons, long-span structural systems with steel and composite structures are under consideration in the architectural field.
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