Strut and tie model for a hybrid nodes in beam of concrete and steel beam under gravitatory loads

Authors

  • Y. Mieles Universidad Técnica de Manabí (Ecuador)
  • R. Larrúa Universidad de Camagüey (Cuba)

DOI:

https://doi.org/10.4067/S0718-50732019000300330

Keywords:

Hybrid nodes, steel deck, strut and tie, concrete beams, experimental tests

Abstract

Experimental tests carried out in the laboratory of structures of the National Polytechnic School (Ecuador) in beams with hybrid nodes, increasingly used in the construction of buildings with steel deck slabs, demonstrated that the hybrid nodes does not decrease the strength of concrete beams, reaching approximate values to the theoretical ones for the beam without nodes.

With the results of the experimentation and models in finite elements, the trajectory of efforts to perform a Strut and Tie Model (STM) was sought, obtaining areas of steel 15% superior to the design with the flexion formulas of the ACI 318-14. General formulas of the STM are presented for beams of any light with a single hybrid nodes, but it is possible to extend them to several nodes. The experimental evidence and STM shows that the point load is transferred better with the steel beam penetrating the concrete beam, which does not decrease the strength.

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Author Biographies

Y. Mieles, Universidad Técnica de Manabí (Ecuador)

Universidad Técnica de Manabí – Portoviejo, ECUADOR

R. Larrúa, Universidad de Camagüey (Cuba)

Universidad de Camagüey – Camagüey, CUBA

Published

2019-12-31

How to Cite

Mieles, Y., & Larrúa, R. (2019). Strut and tie model for a hybrid nodes in beam of concrete and steel beam under gravitatory loads. Revista Ingeniería De Construcción, 34(3), 330–341. https://doi.org/10.4067/S0718-50732019000300330

Issue

Section

Original Research