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Due to these outstanding properties, the use of fiber\u2010reinforced concrete (FRC) composites has been investigated for applications in structural members subjected to shear, in which brittle failure mode may occur. An example of this type of application is the use of high\/ultrahigh\u2010performance fiber\u2010reinforced concrete (HPFRC\/UHPFRC) in flat slab\u2010column connections as an alternative to shear reinforcement. The experimental results revealed that the use of advanced concrete materials led to an increase in the punching shear and deformation capacities. Despite these advantages, the use of HPFRC\/UHPFRC in practical design is somehow limited by the lack of guidelines in codes for this type of new material. Furthermore, the study of constitutive models for nonlinear finite element analysis is also necessary. In this regard, this article addresses the simulation of two\u2010way slabs with HPFRC, subjected to concentrated monotonic vertical loading, tested in a previous experimental study, where the HPFRC was used only in a limited slab region around the column, and the rest of the slab was cast with normal strength concrete. The numerical models were developed in the commercial finite element software DIANA. The concrete nonlinear behavior was modeled by a total strain\u2010based constitutive model, in which the HPFRC softening is represented by a tensile stress\u2010crack width (<jats:italic>\u03c3<\/jats:italic>\u2009\u2212\u2009<jats:italic>w<\/jats:italic>) relationship. The validity of the numerical model is checked by the comparison with the experimental results and a punching shear mechanical model, leading to the formulation of a closed\u2010form equation. Finally, a parametric study was conducted to extrapolate the results obtained in the experimental campaign and to optimize the use of HPFRC to obtain a more economical and sustainable solution.<\/jats:p>","DOI":"10.1002\/suco.202200826","type":"journal-article","created":{"date-parts":[[2022,11,10]],"date-time":"2022-11-10T06:16:32Z","timestamp":1668060992000},"page":"5787-5807","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Nonlinear analysis of flat slab\u2010column connections to optimize the use of <scp>HPFRC<\/scp> under monotonic vertical loading"],"prefix":"10.1002","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6907-7159","authenticated-orcid":false,"given":"Rafael Sanabria","family":"D\u00edaz","sequence":"first","affiliation":[{"name":"School of Civil Engineering, Architecture and Urban Design University of Campinas (UNICAMP)  Campinas Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6495-8715","authenticated-orcid":false,"given":"Brisid","family":"Isufi","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering NOVA School of Science and Technology  Caparica Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4631-9290","authenticated-orcid":false,"given":"Leandro Mouta","family":"Trautwein","sequence":"additional","affiliation":[{"name":"School of Civil Engineering, Architecture and Urban Design University of Campinas (UNICAMP)  Campinas Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9496-4991","authenticated-orcid":false,"given":"Ant\u00f3nio Pinho","family":"Ramos","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering NOVA School of Science and Technology  Caparica Portugal"},{"name":"CERIS Civil Engineering Research and Innovation for Sustainability  Lisbon Portugal"}]}],"member":"311","published-online":{"date-parts":[[2022,11,9]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1617\/s11527-009-9538-3"},{"key":"e_1_2_10_3_1","doi-asserted-by":"crossref","unstructured":"BlazyJ NunesS SousaC PimentelM.Development of an HPFRC for use in flat slabs. 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