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Buildings & Construction

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Displaying 51 - 75 of 3873

Impact of Detailing on the Lateral Performance of Cold-Formed Steel Framed Walls

June 27, 2022
Author(s)
Zhidong Zhang, Matthew Speicher, Amanpreet Singh, Tara Hutchinson, Benjamin Schafer
The main objective of this study is to investigate the impact of structural and non-structural detailing that is not directly accounted for in conventional lateral strength and ductility design of wall-lines constructed of cold-formed steel (CFS) framed

Measurement Methods and Techniques for Pressure Losses in Pipe Fittings

June 25, 2022
Author(s)
Lingnan Lin, Marylia Duarte Batista, Natascha S. Milesi-Ferretti
Pressure losses in pipe fittings are important design information for sizing pipelines and selecting pumps. Currently, there is no standard method of test for determining the pressure loss of pipe fittings. To assist future development of a standard method

Measurement Methods and Techniques for Pressure Losses in Pipe Fittings

June 25, 2022
Author(s)
Lingnan Lin, Marylia Duarte Batista, Natascha S. Milesi-Ferretti
Pressure losses in pipe fittings are important design information for sizing pipelines and selecting pumps. Currently, there is no standard method of test for determining the pressure loss of pipe fittings. To assist future development of a standard method

Certification of Standard Reference Material(R) 114r Portland Cement Fineness

June 6, 2022
Author(s)
Eduarda Votri, Blaza Toman, Paul E. Stutzman
The SRM 114 series for portland cement fineness has been provided by NIST since 1934 for use in calibrating instruments for measuring fineness characteristics of portland cement and other powdered construction materials. SRM 114r is the latest of this

Assessment of the reason for the vitrification of a wall at a hillfort. The example of Broborg in Sweden

May 9, 2022
Author(s)
Rolf Sjoblom, Eva Hjarthner-Holdar, Carolyn Pearce, Jamie Weaver, Erik Ogenhall, John McCloy, Jose Marcial, Edward Vicenzi, Michael Schweiger, Albert Kruger
It was discovered around 250 years ago that some of the rock material in the walls of some hillforts had been subjected to such high temperature that it had vitrified. This prompted a debate as to the reason for it that is still going on today: did the

Models for an Ultraviolet-C Research and Development Consortium

March 25, 2022
Author(s)
Dianne L. Poster, C Cameron Miller, Yaw S. Obeng, John J. Kasianowicz, Michael T. Postek, Norman Horn, Troy Cowan, Richard Martinello
The development of an international, precompetitive, collaborative, ultraviolet (UV) research consortium is discussed as an opportunity to lay the groundwork for a new UV commercial industry and the supply chain to support this industry. History has

EVAP-COND Simulation Tool with Optimization Refrigerant Circuitry

February 1, 2022
Author(s)
Piotr Domanski
EVAP-COND is a software package that contains simulation models for a finned-tube evaporator and condenser. The modeling scheme allows for specifying complex refrigerant circuits, modeling refrigerant distribution between these circuits, and accounting for

Bioinspired Wear-Resistant and Ultra-Durable Functional Gradient Coatings

January 28, 2022
Author(s)
Zhengzhi Wang, Kun Wang, Houbing Huang, Xiao Cui, Zuoqi Zhang, Martin Chiang
For mechanically protective coatings, the coating material usually requires sufficient stiffness and strength to resist external forces and meanwhile matched mechanical properties with the underneath substrate to maintain the structural integrity. These

Evaluation of Indoor Environmental Concentrations in Buildings with Conditioned and Unconditioned Zones (IECCU) model for predicting TCPP concentrations in a low-energy test house

January 18, 2022
Author(s)
Dustin Poppendieck, Lisa Ng, Stephen Zimmerman
Globally over 100,000 different chemicals are manufactured every year (Levi et al. 2018). It is impossible to measure the fate of all of these chemicals in the wide range of indoor environments. The Indoor Environmental Concentrations in Buildings with

NIST Outdoor Structure Separation Experiments (NOSSE): Preliminary Test Plan

January 10, 2022
Author(s)
Alexander Maranghides, Shonali Nazare, Eric Link, Matthew Bundy, Artur A. Chernovsky, Erik L. Johnsson, Kathryn Butler, Steven Hawks, Frank Bigelow, William (Ruddy) Mell, Anthony Bova, Derek McNamara, Tom MIlac, Daniel Gorham, Faraz Hedayati, Bob Raymer, Frank Frievalt, William Walton
The Structure Separation Project is a multi-level project to assess structure-to-structure fire spread in Wildland-Urban Interface (WUI) communities. The project is divided into three phases with each phase assessing radiant and convective heat exposures

Low-GWP Alternative Refrigerant Blends for HFC-134a: Interim Report

October 13, 2021
Author(s)
Piotr A. Domanski, Mark O. McLinden, Valeri I. Babushok, Ian Bell, Tara Fortin, Michael Hegetschweiler, Mark A. Kedzierski, Dennis Kim, Lingnan Lin, Gregory T. Linteris, Stephanie L. Outcalt, Richard A. Perkins, Aaron Rowane, Harrison M. Skye
This project addresses the objectives of the Statement of Need number WPSON-17-20 "No/Low Global Warming Potential Alternatives to Ozone Depleting Refrigerants." Its goal is to identify and demonstrate performance of low global-warming-potential (GWP), non

A Continuum-Atomistic Simulation of Heat Transfer in Micro- and Nano-Flows

October 12, 2021
Author(s)
J Liu, S Chen, Xiaobo Nie, M O. Robbins
We develop a hybrid atomistic-continuum scheme for simulating micro- and nano- flows with heat transfer. The approach is based on spatial ''domain decomposition'' in which molecular dynamics (MD) is used in regions where atomistic details are important

A New Reactive Molecular Dynamics Model Of Polymer Pyrolysis

October 12, 2021
Author(s)
Stanislav Stoliarov, Kenneth D. Smith, P R. Westmoreland, Richard E. Lyon, Marc R. Nyden
In this paper, we report progress that has been made in the development of an extension of classical force-field-based molecular dynamics (MD) to the simulation of chemical reactions. We review several studies of polymer pyrolysis that were performed using

Computations of Particle Surface Characteristics Using Optical and X-Ray CT Images

October 12, 2021
Author(s)
E Masad, S Saadeh, T Al-Rousan, Edward Garboczi, D Little
The description of particle surface characteristics is of interest in many disciplines in science and engineering such as powder technology, geology, soil science, and infrastructure materials. Consequently, there is a need to develop methods to quantify
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