Study on the Extended Length of Adjustable Bearing Bracket in Cast-in-Place Concrete Formwork System
Author(s): LIU Li, WANG Meng, WU Jinguo, ZHOU Guohong, LI Yunyang, School of Civil Engineering, Shenyang Jianzhu University, Liaoning Provincial Conmmunication Planning & Design, Institute Corresponding, Municipal Engineering Construction Department of Shenyang
Pages: 466-473
Year: 2015 Issue: 3
Journal: Journal of Shenyang Jianzhu University(Natural Science)
Keyword: formwork system of cast-in-place concrete; movable bracket; ultimate load; finite element analysis;
Abstract: This paper studied effects of the extended length of the adjustable bracket on the lateral displacement,bearing capacity and stability of the frame body and obtained the reasonable extending length,so as to give some references for code revision and construction plan. Combining with tests of single rod loading movable bearing bracket and applying finite element software,single rod loading model and expanding model were simulated,respectively. It is found that the failure load of bracket decreases significantly with increase of extending length of the movable bracket. The distance between the bracket and center line of the top horizon rod should not be great that 0. 4 m.The height of screwshould not be large than 0. 2 m. Conclusion is that with increase of the extending length of adjustable bracket,the ultimate bearing capacity of template bracket system decreases; the top lateral displacement of the frame body increases. By same distances between the adjust-able bracket and center line of the top horizon rod,if the extending length of bracket is great than the extending length of vertical rod,the top displacement of the bracket greatly increases and its global stability decreases significantly.
Pages: 466-473
Year: 2015 Issue: 3
Journal: Journal of Shenyang Jianzhu University(Natural Science)
Keyword: formwork system of cast-in-place concrete; movable bracket; ultimate load; finite element analysis;
Abstract: This paper studied effects of the extended length of the adjustable bracket on the lateral displacement,bearing capacity and stability of the frame body and obtained the reasonable extending length,so as to give some references for code revision and construction plan. Combining with tests of single rod loading movable bearing bracket and applying finite element software,single rod loading model and expanding model were simulated,respectively. It is found that the failure load of bracket decreases significantly with increase of extending length of the movable bracket. The distance between the bracket and center line of the top horizon rod should not be great that 0. 4 m.The height of screwshould not be large than 0. 2 m. Conclusion is that with increase of the extending length of adjustable bracket,the ultimate bearing capacity of template bracket system decreases; the top lateral displacement of the frame body increases. By same distances between the adjust-able bracket and center line of the top horizon rod,if the extending length of bracket is great than the extending length of vertical rod,the top displacement of the bracket greatly increases and its global stability decreases significantly.
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