Title Structural Safety Evaluation During Construction According to the Details of the Mechanical Fixing Device in Removable Deck Plate
Authors 정현석(Jung, Hyun-Suk) ; 이승용(Lee, Seung-Yong) ; 최창식(Choi, Chang-Sik)
DOI https://doi.org/10.5659/JAIK.2021.37.12.285
Page pp.285-293
ISSN 2733-6247
Keywords deck plate; removable fixing device; construction safety; deflection
Abstract In this study, a slab system using a new concept of deck plate that can be easily fixed and separated was developed, and the optimized detail that can be separated during construction and the safety of the construction load were presented. First, in order to examine the load acting on the contact surface of the fixing device, a finite element analysis was performed to predict and compare the structural behavior of experimental results. As a result of the analysis, it was confirmed that the stress distribution showed a pattern in which the stress was concentrated to the curved part of the connecting member at the starting point of the load control, and the shape of the fixing device was determined based on the finite element analysis result. Tensile tests were performed using UTM with a capacity of 1000 kN to confirm the fixing performance of the fixing device based on the finite element analysis results. As a result of the fixing device test, it was found that the improvement of the cross-sectional shape has an effect on the fixing performance of the fixing device, and accordingly, the thickness reduction was also possible. Next, construction load test was conducted to examine the structural safety of the local failure of the fixing device during the construction, which is a problem that may occur when developing a removable deck plate. As a result of the deflection test, when considering the design safety factor in the construction load test conducted to examine the deflection, it was found that the installation distance of the fixing device should be within a maximum of 300mm. It is necessary to secure a sufficient safety factor based on the result of this technology development where there is a concern about the construction load and the concentrated load caused by the equipment in construction.