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Selvarajah Ramesh, Lisa Choe, Matthew Hoehler, Matthew Bundy, Rodney Bryant, Giovanni Di Cristina Torres, Brian Story, Anthony R. Chakalis, Artur A. Chernovsky, Philip Deardorff, Michael Selepak
The National Fire Research Laboratory at the National Institute of Standards and Technology conducted a series of large compartment fire tests to investigate the behavior and fire-induced failure mechanisms of full-scale composite floor assemblies with a
Lisa Choe, Matthew Hoehler, Matthew Bundy, Rodney A. Bryant, Brian Story, Anthony R. Chakalis, Artur A. Chernovsky, Selvarajah Ramesh, Xu Dai
The National Institute of Standards and Technology is currently conducting a series of large compartment fire tests to investigate the behavior and fire-induced failure mechanisms of the full-scale composite floor assemblies with the two-story steel
Cold-formed-steel construction frequently relies on strap-braced, cold-formed-steel framed walls as the lateral-force resisting system. While the behavior of these walls has been studied during fire and under lateral loading separately, the influence of
Lisa Choe, Selvarajah Ramesh, Xu Dai, Matthew Hoehler, Matthew Bundy
The purpose of this paper is to report the first of four planned fire experiments on the 9.1 m × 6.1 m steel composite floor assembly as part of the two-story steel framed building constructed at the National Fire Research Laboratory. This paper presents
Lisa Choe, Selvarajah Ramesh, Xu Dai, Matthew Hoehler, Matthew Bundy, Rodney A. Bryant, Brian Story, Anthony R. Chakalis, Artur A. Chernovsky
The National Institute of Standards and Technology is currently conducting a series of large compartment fire tests to investigate the behavior and fire-induced failure mechanisms of the full-scale composite floor systems situated in the two-story and two
Lisa Choe, Selvarajah Ramesh, Chao Zhang, Charles Clifton
A series of fire experiments are being conducted on the 2-story steel framed building with composite floors in the National Fire Research Laboratory. This paper presents a brief overview of experimental design and discusses some results of the first test
The accuracy of the exhaust flow measurement contributes significantly to the uncertainty of calorimetry measurements for large fire testing. Less than ideal flow characteristics such as skewed velocity distributions are typical of these largescale flows
Yanping Zhu, Matthew Klegseth, Yi Bao, Matthew Hoehler, Lisa Choe, Genda Chen
This study explores an instrumentation strategy using distributed fiber optic sensors to measure strain and temperature through the concrete volume in large-scale structures. Single-mode optical fibers were deployed in three 12.8 m long steel and concrete
Ignitability of structural components due to ember accumulation is a common cause of structural fires in wildland urban interface (WUI) communities. To fire harden structures in WUI communities, it is important to quantitatively predict the ember
Previous building fires and research has shown that simple (shear) connections develop large axial force and flexural demands during a fire leading to potential failure of the connections and progressive collapse of a building. These findings have
This paper presents closed-formed equations developed to evaluate critical temperatures of structural steel compression and tension members exposed to fire. The deterministic approach involved a parametric study using finite-element simulations in order to
Lisa Y. Choe, Selvarajah Ramesh, Xu Dai, Matthew S. Hoehler, Matthew F. Bundy
This paper presents the first of four planned fire experiments of a full-scale two-story steel framed building constructed at the National Fire Research Laboratory. This first experiment was aimed to quantify the fire resistance and behaviour of the steel
Xu Dai, Lisa Y. Choe, Erica Fischer, Charles Clifton
To perform structural fire design and analysis for steel-framed composite structures, the role of steel connections is essential. However, the current design provisions are based on small-scale fire experiments, and their reliability is questionable for
Yi Bao, Matthew Hoehler, Christopher M. Smith, Matthew Bundy, Genda Chen
Detailed information about temperature distribution can be important to understand structural behavior in fire. This study develops a method to image three-dimensional temperature distributions in steel- concrete composite slabs using distributed fiber
This short presentation shows the functional concept, Do It Yourself (DIY) construction details and select deployment examples for the current (May 2020) water-cooled live streaming camera systems (2D cameras) used to capture video footage in severe fires
Randall J. McDermott, Glenn P. Forney, Matthew S. Hoehler, Matthew F. Bundy, Lisa Y. Choe, Chao Zhang
The photograph on the left shows a large-scale experiment studying the interaction between fire and mechanically- loaded building elements performed during the commissioning of the National Fire Research Laboratory (NFRL) at the National Institute of
This paper presents an experimental behavior of unprotected W16 × 26 steel beams subjected to localized fire. Beam specimens were either simply supported or connected to steel columns via all bolted double angle connections. Two test fires, steady or
Ten commercial fire-retardant coatings (FRCs) designed for wood in outdoor applications, either film-forming or non-film forming (stains), and five top-coatings (used in combination with a FRC to increase its durability) were characterized by microscale
360-degree video recorded in fires provides a unique perspective that allows the viewer to change the field of view as regions of interest vary in space and time. Use of 360-degree and traditional cameras at some locations in intense fires for extended
Lisa Y. Choe, Selvarajah Ramesh, William L. Grosshandler, Matthew S. Hoehler, Mina S. Seif, John L. Gross, Matthew F. Bundy
This paper presents the results of compartment fire experiments on four 12.8 m long composite floor beams with various end support conditions. Specimens were constructed as partially- composite beams, consisting of W18x35 steel beams and 83 mm thick
Jian Jiang, Joseph Main, Jonathan Weigand, Fahim H. Sadek
This paper describes a reduced-order modeling approach for the thermal and structural analysis of fire effects on composite slabs with profiled steel decking. The reduced-order modeling approach, which uses alternating strips of layered shell elements to
Jian Jiang, Joseph Main, Jonathan Weigand, Fahim H. Sadek
This paper presents a reduced-order numerical modeling approach for the analysis of heat transfer in composite floor slabs with profiled steel decking exposed to fire effects. This approach represents the thick and thin portions of a composite slab with
Matthew S. Hoehler, Blanca Andres Valiente, Matthew F. Bundy
This paper examines the structural response of cold-formed steel-framed building lateral force- resisting systems under combinations of simulated earthquake and fire loading. Full-scale experiments with gypsum-sheet steel composite panel sheathed walls
The National Fire Research Laboratory is a unique large-fire research facility; able to characterize the response of full-scale building systems to realistic mechanical loading and fire. The facility maintains an infrastructure of measurements necessary
Stability is paramount to the load-carrying capacity of structural steel members subjected to fire. Actual buckling strengths of steel members in fire become lower than that at ambient temperature since modulus of elasticity (E) and yield strength (Fy)