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

• Grant number: 18/21573-2
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: June 01, 2019
• End date: September 30, 2022
• Field of knowledge: Engineering - Civil Engineering - Structural Engineering
• Principal Investigator: Mounir Khalil El Debs
• Grantee: Alex Micael Dantas de Sousa
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

The shear force strength has attracted, over the last decades, great discussions about the understanding of the involved mechanisms and their quantification. A large number of mechanical models developed mostly deal with the shear strength of beams or the concentric punching of slabs. However, in the case of loads distributed in small areas close to the support, a usual situation in bridge deck slabs, not all the width of the supports is mobilized. For this reason, it is generally necessary to define a cooperative/effective width in the shear strength. In this aspect, many works were developed evaluating the level of precision of different calculation models combined with different ways of defining the effective width. However, most of these were performed with slabs of thicknesses greater than those practiced in Brazilian designs and using a deterministic approach in the calibration of calculation models. For this reason, the aim of this research proposal is to develop a most suitable study about the national practice of designs regarding the use of thinner slabs (200-250 mm). In addition, it is proposed the use of probabilistic tools combined with a more comprehensive database for the development of more accurate calculation models for this type of request. In this way, it is intended to develop an experimental program, in addition to the database of experimental results built in the master course of the candidate, including parameters little or not evaluated in the most recent publications that allow a better understanding of the physical mechanisms of the problem. The study also includes numerical simulation of experimental results and parametric analysis of the calibrated models, using the finite element method, to investigate in a more detailed way the influence of aspects as the arching effect and the arrangement of corbels in slabs requested by loads distributed in small areas close to the support. (AU)

Scientific publications

(9)

(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)

DE SOUSA, ALEX M. D.; LANTSOGHT, EVA O. L.; GENIKOMSOU, AIKATERINI S.; KRAHL, PABLO A.; EL DEBS, MOUNIR K.. Behavior and punching capacity of flat slabs with the rational use of UHPFRC: NLFEA and analytical predictions. ENGINEERING STRUCTURES, v. 244, OCT 1 2021. (18/21573-2)

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 M. D.; LANTSOGHT, EVA O. L.; YANG, YUGUANG; EL DEBS, MOUNIR K.. Extended CSDT model for shear capacity assessments of bridge deck slabs. ENGINEERING STRUCTURES, v. 234, MAY 1 2021. (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)

ALEX MICAEL DANTAS DE SOUSA; YURI DANIEL JATOBÁ COSTA; ARTHUR GOMES DANTAS DE ARAUJO; CARINA MAIA LINS COSTA. Comportamento de estacas escavadas em hélice contínua (CFA) e de estacas metálicas em seção H sob carregamento lateral: análise experimental e numérica. Rev. IBRACON Estrut. Mater., v. 14, n. 3, 2021-03-19. (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)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SOUSA, Alex Micael Dantas de. One-way shear and punching strength of reinforced concrete slabs without transverse reinforcement under concentrated loads. 2022. Doctoral Thesis - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.