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Title |
Evaluation of Construction Loads of Slabs and Shores with Removing Shores and Placing Reshores
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Authors |
천성철 ; 탁소영 ; 이성호 ; 소광호 ; 하태훈 |
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DOI |
https://doi.org/10.4334/JKCI.2014.26.3.385 |
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Keywords |
시공하중 ; 동바리 ; 동바리 되세우기 ; 현장계측 ; 동바리 하중 construction load ; shore ; reshore ; site measurement ; supporting load |
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Abstract |
Reshoring makes slab deflect and support its own weight. The construction loads on the slabs in lower levels decrease using the reshoring. Simplified analysis proposed by ACI 347.2R-05 showed that if the reshoring is applied, construction loads on slabs and shores, and quantities of forms and shores decreased by 40%, 23%, 40%, and 50%, respectively. Shores' loads were comparatively measured on site. The measured reshore load was half of the load before removing the shores and was also lower than the measured shore load by 35%. To verify the safety of the reshoring, deflections of beams and strains of beam longitudinal bars were also measured. The maximum deflection was only L/5000 and the maximum bar strain was only 3.6% of the yield strain. Consequently, reshoring neither cause problems on the safety nor serviceability. In addition, the beam load was expected from the measured shores' loads and it coincides well with the predicted value by the simplified analysis of ACI 347.2R-05.
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