1. Theoretical and experimental study on steel open-web sandwich floor with flanged cruciform section shear key
- Author
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Shen Ruilin, Weiyi Zeng, Kejian Ma, Mao Jiayi, Qin Wang, Xiao Jianchun, and Guiping Li
- Subjects
Materials science ,Shear stiffness ,business.industry ,Mechanical Engineering ,Maximum deviation ,Aerospace Engineering ,Ocean Engineering ,Safety margin ,finite element analysis ,Structural engineering ,Finite element method ,steel open-web sandwich floor ,Cruciform ,Shear (geology) ,Flanged cruciform section shear key ,Mechanics of Materials ,Automotive Engineering ,General Materials Science ,intersection beam analogy method ,Bearing capacity ,static test ,business ,Maximum displacement ,Civil and Structural Engineering - Abstract
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.
- Published
- 2020
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