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      Punching shear in flat slabs by strut and tie model Translated title: Punção em lajes lisas via modelo de bielas e tirantes

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          Abstract

          Abstract Research on behavior of flat slabs under punching shear, performed by Kinnunen, Regan and Muttoni influenced the main design recommendations. Meanwhile, studies about strut and tie model developed by Schlaich for beams, deep beams and corbels also influenced these design codes. This work aimed to adapt the strut and tie model for the punching shear resistance analysis in flat slabs. The punching shear resistance of 30 flat slabs verified through strut and tie model was compared to the one designed following Brazilian, American and European codes recommendation. Subsequently, this same model was validated by comparing the test results of 32 flat slabs. The strut and tie model results, when compared with the test results, showed a better average than those from codes, and the modified strut and tie model can become an alternative for punching shear strength prediction.

          Translated abstract

          Resumo Pesquisas sobre punção em lajes lisas, realizadas por Kinnunen, Regan e Muttoni influenciaram sobremaneira as principais recomendações normativas. Enquanto isso, os estudos sobre o modelo de bielas e tirantes desenvolvido por Schlaich para vigas, vigas paredes e consolos também influenciaram essas normas. Este trabalho teve o objetivo de adaptar o modelo de bielas e tirantes para a análise da resistência à punção em lajes lisas. Comparou-se a resistência à punção de 30 lajes lisas calculadas via modelo de bielas e tirantes com a resistência calculadas pelas normas brasileira, americana e européia. Posteriormente, este mesmo modelo foi validado comparando com os resultados experimentais de 32 lajes lisas. Os resultados do modelo de bielas e tirantes, quando comparados aos experimentais, apresentaram melhor média que as estimativas normativas, podendo o modelo modificado se tornar uma alternativa para estimar a resistência ao puncionamento.

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          Most cited references15

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          Toward a Consistent Design of Structural Concrete

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            Punching shear strength of reinforced concrete slabs without transverse reinforcement

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              Shearing strength of reinforced concrete slabs

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                Author and article information

                Journal
                riem
                Revista IBRACON de Estruturas e Materiais
                Rev. IBRACON Estrut. Mater.
                IBRACON - Instituto Brasileiro do Concreto (São Paulo, SP, Brazil )
                1983-4195
                2021
                : 14
                : 5
                : e14506
                Affiliations
                [01] Sobral CE orgnameUniversidade Estadual Vale do Acaraú orgdiv1Faculdade de Engenharia Civil Brasil
                [02] Belém Pará orgnameUniversidade Federal do Pará orgdiv1Faculdade de Engenharia Civil Brazil
                Article
                S1983-41952021000500208 S1983-4195(21)01400500208
                10.1590/s1983-41952021000500006
                6c42602b-35da-4c28-933a-96b9bf664eb6

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 01 September 2020
                : 12 February 2020
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 16, Pages: 0
                Product

                SciELO Brazil

                Categories
                Original Article

                modelo de bielas e tirantes,flat slab,punching shear,strut and tie model,punção,laje lisa

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