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Displaying 1001 - 1025 of 7702

Numerical modeling of heat transfer in steel-concrete composite slabs

June 10, 2016
Author(s)
Jian Jiang, Joseph A. Main, Jonathan M. Weigand, Fahim Sadek
This paper presents detailed and reduced-order numerical modeling of heat transfer in composite floor slabs with profiled steel decking. The detailed modeling approach represents the concrete slab with solid elements and the steel decking with shell

Movement on Stairs During Building Evacuations

June 8, 2016
Author(s)
Richard D. Peacock, Paul A. Reneke, Erica D. Kuligowski, Robert C. Hagwood
The time that it takes an occupant population to reach safety when descending a stair during building evacuations is typically estimated by measureable engineering variables such as stair geometry, speed, stair density, and pre-observation delay. In turn

High-temperature material constitutive models for structural-fire analysis

June 7, 2016
Author(s)
Chao Zhang, Lisa Choe, John L. Gross
The applicability of three steel constitutive models was evaluated using finite-element analyses and various member capacity equations. Three different high-temperature stress-strain models were compared: the model recently developed by the National

The performance of structural steel beams subject to a localized fire

June 7, 2016
Author(s)
Lisa Choe, Selvarajah Ramesh, Chao Zhang, John L. Gross
This paper presents the results from the open flame, localized fire tests conducted on the 6.17-m long, simply supported W16×26 beam specimens. The cross sections at midspan (i.e. expected plastic hinge zone) of the beam specimen directly exposed to the

An Improved Method Of Modeling Infiltration In Commercial Building Energy Models

June 1, 2016
Author(s)
Lisa C. Ng, Steven J. Emmerich, Andrew K. Persily
Different strategies for improving building envelope thermal performance are being implemented in commercial building design and construction as well as being incorporated into ASHRAE standards and other design requirements. The energy impacts of

Premixed flame inhibition by CF3Br and C3H2F3Br (2-BTP)

June 1, 2016
Author(s)
John Pagliaro, Gregory T. Linteris, Nicolas Bouvet
The un-stretched burning velocities and Markstein lengths of premixed CH4- and C3H8-air flames with added C3H2F3Br (2-BTP) or CF3Br (Halon 1301), have been studied experimentally and numerically. The predicted un-stretched burning velocities, using a

Guidance for the Model User on Representing Human Behavior in Egress Models

May 24, 2016
Author(s)
Erica D. Kuligowski, Steve Gwynne, Michael Kinsey, Lynn Hulse
Structures are currently designed and constructed in accordance with prescriptive and performance-based (PBD) methodologies to ensure a certain level of safety. The performance-based approach requires the quantification of both ASET (Available Safe Egress

Calibration of rheometers for cementitious materials

May 16, 2016
Author(s)
Chiara F. Ferraris, Nicos Martys, William L. George, Edward J. Garboczi, Alex Olivas
The calibration of rheometers to determine the rheological properties of cement based materials ranging from cement paste to concrete cannot be done using standard oils as they are cost prohibitive and do not possess sufficient granularity to test slip
Displaying 1001 - 1025 of 7702
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