Calibration of shear strength calculation models to bridge slabs with emphasis on the national designs practice

• Grant number: 19/20092-3
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2020
• End date: January 31, 2023
• Field of knowledge: Engineering - Civil Engineering - Structural Engineering
• Principal Investigator: Mounir Khalil El Debs
• Grantee: Mounir Khalil El Debs
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated researchers: Alex Micael Dantas de Sousa

Abstract

The large number of shear strength models developed mostly deal with the analysis of beams or punching capacity of slabs. However, to loads distributed in small areas close to the support, which is often the case in slab bridge decks, there is a higher concentration of support reactions in the region closest to the loaded area. For this reason, an effective width is generally adopted in the one-way shear strength analyses in these cases. Regard to this, many works have been developed evaluating the level of accuracy and precision of different calculation models combined with the most common approaches of effective width definition. However, most of these studies were performed with slabs of greater thickness than those practiced in projects in Brazil and using a deterministic approach in the calibration of calculation models. For this reason, this project proposes a more adequate study of the national practice of projects regarding the use of slabs of smaller thickness (200-250 mm) and using probabilistic tools for the development of reliable calculation models for this type of loading. To this end, it is intended to develop an experimental program representative of the national practice of bridge designs that supports the development of more suitable approaches to analyse the shear strength to partially distributed loads close to the support. The study also includes numerical simulation of experimental models and parametric analysis of calibrated models, using the finite element method, to further investigate aspects such as the thickness increase near the supports on shear strength of bridge slabs. (AU)

Scientific publications

(6)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ALEX MICAEL DANTAS DE SOUSA; EVA OLIVIA LEONTIEN LANTSOGHT; DANIEL DE LIMA ARAÚJO; LISIANE PEREIRA PRADO; MOUNIR KHALIL EL DEBS. Recomendações para avaliação da resistência à força cortante e punção de lajes unidirecionais sob cargas concentradas de acordo com a ABNT NBR 6118:2014. Rev. IBRACON Estrut. Mater., v. 16, n. 3, 2023-05-22. (19/20092-3, 21/13916-0, 18/21573-2)

DE SOUSA, ALEX MICAEL DANTAS; LANTSOGHT, EVA OLIVIA LEONTIEN; EL DEBS, MOUNIR KHALIL. Shear and Punching Capacity Predictions for One-Way Slabs under Concentrated Loads Considering the Transition between Failure Mechanisms. BUILDINGS, v. 13, n. 2, p. 28-pg., 2023-02-01. (21/13916-0, 19/20092-3, 18/21573-2)

SOUSA, ALEX M. D. DE; LANTSOGHT, EVA O. L.; GENIKOMSOU, AIKATERINI S.; PRADO, LISIANE P.; DEBS, MOUNIR K. EL. NLFEA of one-way slabs in transition between shear and punching: Recommendations for modeling. ENGINEERING STRUCTURES, v. 293, p. 26-pg., 2023-10-15. (21/13916-0, 19/20092-3, 18/21573-2)

DE SOUSA, ALEX M. D.; LANTSOGHT, EVA O. L.; EL DEBS, MOUNIR K.. One-way shear strength of wide reinforced concrete members without stirrups. STRUCTURAL CONCRETE, v. 22, n. 2, p. 25-pg., 2020-05-17. (19/20092-3, 18/21573-2)

DE SOUSA, ALEX M. D.; LANTSOGHT, EVA O. L.; EL DEBS, MOUNIR K.. One-way shear strength of wide reinforced concrete members without stirrups. STRUCTURAL CONCRETE, MAY 2020. (19/20092-3, 18/21573-2)

DE SOUSA, ALEX M. D.; LANTSOGHT, EVA O. L.; EL DEBS, MOUNIR K.. Failure mechanism of one-way slabs under concentrated loads after local reinforcement yielding. ENGINEERING STRUCTURES, v. 291, p. 23-pg., 2023-06-17. (21/13916-0, 19/20092-3, 18/21573-2)