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Displaying 51 - 75 of 90

Workshop on Quantitative Tools for Condition Assessment of Aging Infrastructure

October 14, 2010
Author(s)
Ward L. Johnson, Thomas A. Siewert, Jessica Terry, Dat Duthinh, Mark Iadicola, William E. Luecke, Joseph D. McColskey
The Quantitative Tools for Condition Assessment of Aging Infrastructure Workshop was held May 4-5, 2010, in Boulder, Colorado. It was organized by a team of researchers within the National Institute of Standards and Technology s (NIST) Materials Science

Block shear failure of steel gusset plates

July 1, 2010
Author(s)
Chiara Crosti, Dat Duthinh
Following the catastrophic failure of the I-35W bridge in Minnesota in 2007, the Federal Highway Admin-istration issued guidelines for the load rating of bolted and riveted gusset plates in truss bridges (FHWA, 2009). This paper develops finite-element

Mean Recurrence Intervals of Failure Wind Loads

August 1, 2008
Author(s)
Dat Duthinh, Joseph A. Main, Amelia P. Wright, Emil Simiu
The Commentary to the ASCE Standard 7-05 states that the nominal mean recurrence interval (MRI) of the wind speed inducing the design strength is about 500 years if the specified load factor is 1.5, as in early versions of ASCE 7, and somewhat higher than

Recent Advances in Fire-Structure Analysis

February 1, 2008
Author(s)
Dat Duthinh, Kevin B. McGrattan, Abed M. Khaskia
One of the recommendations of the National Construction Safety Team for the Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1, 2005) is to enhance the capability of available computational software to predict

Best Practices for Reducing the Potential for Progressive Collapse in Buildings

February 1, 2007
Author(s)
Bruce R. Ellingwood, Robert Smilowitz, D O. Dusenberry, Dat Duthinh, Hai S. Lew, Nicholas J. Carino
This document is intended to provide owners and practicing engineers with current best practices to reduce the likelihood of progressive collapse of buildings in the event of abnormal loading. The report includes a discussion of an acceptable risk approach

Flexural Strengthening of Masonry Walls with External Composite Bars

August 1, 2003
Author(s)
K K. Bajpai, Dat Duthinh
The strengthening of epoxy with milled glass fibers allows full strength development of #2 glass FRP bars in 200 mm or half a concrete masonry unit length. This fiber-reinforced epoxy should be effective for other types of bars as well.With full anchorage

Strength and Ductility of Concrete Beams Reinforced with Carbon FRP and Steel

November 1, 2001
Author(s)
Dat Duthinh, M A. Starnes
Seven concrete beams reinforced internally with steel and externally with carbon fiber-reinforced polymers (FRP) applied after the concrete had cracked were tested under four-point bending. Results show that FRP is very effective for flexural strengthening