Theoretical and experimental study on steel open-web sandwich floor with flanged cruciform section shear key

• Autor(a) principal: Shen,Ruilin
• Data de Publicação: 2020
• Outros Autores: Xiao,Jianchun, Ma,Kejian, Mao,Jiayi, Li,Guiping, Zeng,Weiyi, Wang,Qin
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Latin American journal of solids and structures (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252020000300503
• topic: Flanged cruciform section shear key; steel open-web sandwich floor; static test; intersection beam analogy method; finite element analysis

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.