프리팹을 적용한 프리캐스트 콘크리트 슬래브 연결부의 인장거동 분석

Abstract

"Cast-in-place" concrete slabs can cause issues such as traffic congestion, dust, noise, and air pollution at the construction site. Precast concrete slabs, which use prefabrication, address these issues by facilitating the installation of prefabricated concrete units on-site. However, cracking and leakage problems have recently been observed in the longitudinal joints that connect the precast concrete slab of existing bridges. Therefore, evaluations of the connectivity and constructability of such joints are essential. Consequently, this study experimentally investigated the longitudinal tensile behavior of joint configurations of six precast concrete slabs with varying joint widths, steel plate configurations, and rebar details to determine the optimal joint configuration. A tensile load was applied to each test specimen, and the resulting relative displacement across the joint was measured. Subsequently, a finite element model of the optimal joint specimen was suggested and determined to exhibit behavior under loads similar to that observed during the test, confirming the ability of finite element analyses to accurately predict the behavior of such joints. (J100-HB-SP) was similar to that of an equivalent monolithic CIP bridge deck (C-SB-NP), indicating that J100-HB-SP is a suitable configuration for a precast bridge deck longitudinal joint. The results of this study are expected to improve designs for the longitudinal joints of precast concrete slabs using prefab, facilitating expedited bridge construction while minimizing construction impacts.The overall structural performance of the optimal precast bridge deck joint