Strategies development for one-way shear and punching shear resistance analyses in bridge slabs

• Grant number: 21/13916-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: October 01, 2022
• End date: February 29, 2024
• 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
• Associated research grant(s): 24/13033-9 - ACI Fall 2024 Concrete Convention, AR.EXT

Abstract

Most of the shear strength models in the literature deal with the analysis of beams and the resistance to concentric punching of slabs. However, in the case of loads distributed in small areas and close to the support, a frequent situation in road bridge decks, an intermediate mode of rupture between beam shear and slab punching can occur. In this aspect, several studies were carried out in Europe, but evaluating laboratory tests on a small scale with only a concentrated load close to the support of the slabs. Therefore, most of these experiments do not simulate aspects such as the effect of the combination of concentrated loads and the greatest thicknesses practiced in bridge slabs. For this reason, we propose to develop an analytical and numerical study that investigates the resistance to shear force and punching of slabs under conditions that are more representative of bridge requirements. For this, it is intended, firstly, to calibrate different numerical models of slabs tested in the literature to represent the possible failure modes by shear force that can occur: (I) failure as a wide beam; (II) eccentric puncture failure and (III) an intermediate mode between beam failure and puncture failure. After validating the numerical modeling strategy, it is intended to simulate slabs with geometry and loading closer to professional practice and develop a parametric study with emphasis on the simulation of different combinations of loading, boundary conditions, and slab thicknesses representative of the national practice of projects. Based on the numerical study, it is intended to develop analysis strategies with analytical calculation models capable of representing the behavior observed in laboratory tests and that observed in the proposed numerical study. Therefore, the study intends to contribute both to a better understanding of the physical problem and to the development of practical design recommendations for professionals in the field. (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)

REGINATO, LUAN; DE SOUSA, ALEX M. D.; SANTOS, JOAO V. C.; EL DEBS, MOUNIR K.. NLFEA of Reinforced Concrete Corbels: Proposed Framework, Sensibility Study, and Precision Level. BUILDINGS, v. 13, n. 7, p. 33-pg., 2023-07-01. (21/13916-0)

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.. 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)

ALEX MICAEL DANTAS DE SOUSA; LISIANE PEREIRA PRADO; MOUNIR KHALIL EL DEBS. Reliability-based design of reinforced concrete pipes to satisfy the TEBT. LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES, v. 20, n. 7, 2023-08-28. (21/13916-0)