{"title":"Residual Post-fire Strength of Shear Studs in Composite Beams with Solid Slabs","authors":"Erfan Maliji, Hossein Yousefpour","doi":"10.1007/s10694-023-01500-w","DOIUrl":null,"url":null,"abstract":"<div><p>Composite steel–concrete beams are employed in buildings and bridges, which may experience elevated temperatures in case of fire. The residual capacity of composite members that survive fire depends on the performance of their shear connectors. This study investigates the capacity of shear studs in composite floors with no metal deck after experiencing elevated temperatures. A 3-D nonlinear finite element model of composite push-out specimens was developed. The model was subjected to the ISO-834 standard fire followed by a cooling-down phase, after which displacement-controlled loading was applied to the model until failure. After validating the model based on experimental data, a parametric study was conducted, in which the load-slip behavior of members employing different concrete compressive strengths, slab thicknesses, shear stud heights, stud diameters, and maximum experienced temperatures was investigated. The thickness of the concrete slab was found to have a noticeable effect on the strength of shear studs before and after heat exposure. The AISC specifications, while overestimating the capacity of unheated shear studs in many cases, were found to underestimate the residual strength of shear studs when used with post-heating mechanical properties. A simplified equation was proposed for quick determination of residual strength of shear studs, which may be used for post-fire structural assessment.</p></div>","PeriodicalId":558,"journal":{"name":"Fire Technology","volume":null,"pages":null},"PeriodicalIF":2.3000,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fire Technology","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10694-023-01500-w","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Composite steel–concrete beams are employed in buildings and bridges, which may experience elevated temperatures in case of fire. The residual capacity of composite members that survive fire depends on the performance of their shear connectors. This study investigates the capacity of shear studs in composite floors with no metal deck after experiencing elevated temperatures. A 3-D nonlinear finite element model of composite push-out specimens was developed. The model was subjected to the ISO-834 standard fire followed by a cooling-down phase, after which displacement-controlled loading was applied to the model until failure. After validating the model based on experimental data, a parametric study was conducted, in which the load-slip behavior of members employing different concrete compressive strengths, slab thicknesses, shear stud heights, stud diameters, and maximum experienced temperatures was investigated. The thickness of the concrete slab was found to have a noticeable effect on the strength of shear studs before and after heat exposure. The AISC specifications, while overestimating the capacity of unheated shear studs in many cases, were found to underestimate the residual strength of shear studs when used with post-heating mechanical properties. A simplified equation was proposed for quick determination of residual strength of shear studs, which may be used for post-fire structural assessment.
期刊介绍:
Fire Technology publishes original contributions, both theoretical and empirical, that contribute to the solution of problems in fire safety science and engineering. It is the leading journal in the field, publishing applied research dealing with the full range of actual and potential fire hazards facing humans and the environment. It covers the entire domain of fire safety science and engineering problems relevant in industrial, operational, cultural, and environmental applications, including modeling, testing, detection, suppression, human behavior, wildfires, structures, and risk analysis.
The aim of Fire Technology is to push forward the frontiers of knowledge and technology by encouraging interdisciplinary communication of significant technical developments in fire protection and subjects of scientific interest to the fire protection community at large.
It is published in conjunction with the National Fire Protection Association (NFPA) and the Society of Fire Protection Engineers (SFPE). The mission of NFPA is to help save lives and reduce loss with information, knowledge, and passion. The mission of SFPE is advancing the science and practice of fire protection engineering internationally.