Theoretical and experimental study on steel open-web sandwich floor with flanged cruciform section shear key
Steel open-web sandwich floors (SOSFs) have been applied in several pioneering industrial and public buildings. The traditional square tube shear key (STSK) is changed into a flanged cruciform section shear key (FCSK) to further improve the bearing capacity of SOSFs. A half-scale test model is desig...
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Published in | Latin American Journal of Solids and Structures Vol. 17; no. 3 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English Portuguese |
Published |
Latin American Journal of Solids and Structures
01.01.2020
Associação Brasileira de Ciências Mecânicas |
Subjects | |
Online Access | Get full text |
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Summary: | Steel open-web sandwich floors (SOSFs) have been applied in several pioneering industrial and public buildings. The traditional square tube shear key (STSK) is changed into a flanged cruciform section shear key (FCSK) to further improve the bearing capacity of SOSFs. A half-scale test model is designed. A graded static loading test is performed to measure deflection and strain. The calculation formula of the intersection beam analogy method (IBAM) considering the influence of shear stiffness is proposed. A finite element (FE) analysis was also performed. The results of the test, IBAM and FE method are compared. The maximum deviation of the deflection obtained by them is less than 5%, and the maximum strain error is less than 7%. These figures prove that all three methods have high precision in the elastic range. Compared SOSFs use a different shear keys with the same grid size and chords, the maximum Mises stress is reduced by 55.9% and the maximum displacement is reduced by 36.1%. The new shear key imparts the structure with improved bearing capacity and safety margin. |
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ISSN: | 1679-7817 1679-7825 1679-7825 |
DOI: | 10.1590/1679-78255897 |