September 29, 2014

Demonstration of tailored impact to achieve blast-like loading

By: Aviram, Ady, Freidenberg, A., Stewart, L.K., Whisler, D., Kim, H., Hegemier, G.A.

Abstract: Investigation of blast loading using mechanical devices is a viable alternative to field testing with live explosives. Using impact to simulate blast-like loads has been shown to generate repeatable loading similar to field testing with...

September 29, 2014

The Great Boston Molasses Tank Failure of 1919

Abstract: A structural and metallurgical perspective of design practices at the time and fracture evidence based on current understanding.

September 29, 2014

FRCM Systems : The Second Generation of Externally-Bonded Composite Systems for Strengthening of Concrete and Masonry Structures

By: Gustavo Tumialan, Antonio DeLuca

Abstract: After overcoming the initial growing pains (insufficient experience, track record, and knowledge overshadowed by overzealous euphoria with “magic” material capabilities), externally-bonded fiber reinforced polymer (FRP)...

September 29, 2014

Metal Wall Panels on the Roof (How to Achieve Durability and Reliability Using Sheet Metal)

By: Scott Tomlinson, Matthew Copeland

Abstract: Some modern architectural designs use new materials and metal panel assemblies for roofing applications, many of which are not intended to be used as roofing and , therefore, may not be well-suited for it. One such trend is the use...

September 25, 2014

SGH Staff Present at Reunion Del Concreto 2014 (RC 2014) in Cartagena, Colombia

From 24 – 26 September 2014, Paul Kelley, Pedro Sifre, and Gustavo Tumialan attended Reunión Del Concreto 2014. Reunión Del Concreto is a construction trade show for the concrete industry in South America, organized by the Colombian...

September 14, 2014

On Further Review, the South Napa Earthquake was a Success Story for Buildings

Abstract: At 3 a.m. on Sunday, Aug. 24, a magnitude-6.0 earthquake centered in the American Canyon, about 9 kilometers south of the city of Napa, awoke much of northern California. The next day, television newscasts focused on damage sustained by...

August 30, 2014

CFRP Renewal of PCCP - an Overview

Abstract: This paper presents the results of a three year research program on carbon fiber reinforced polymer (CFRP) renewal of Prestressed Concrete Cylinder Pipe (PCCP) sponsored by Water Research Foundation to form the theoretical and...

August 30, 2014

Design Innovation: No Ceiling [Innovation skyrockets for Boston tunnel repair]

By: Cory Brett, Scott DiFiore, Blanchard, Chris

Abstract: The Hynes Convention Center is located in the heart of Boston’s historic Back Bay neighborhood. Portions of the Hynes are located directly over I-90, the Massachusetts Turnpike. A 50-year-old cast-in-place concrete slab, suspended...

August 30, 2014

Experimental Basis of CFRP Renewal of PCCP

Abstract: This paper presents the results of the experimental phase of a three year research program sponsored in part by Water Research Foundation (WRF) to form the experimental basis of an American Water Works Association (AWWA) Standard on...

August 30, 2014

Post-Installed Anchors - The Present State of the Industry

By: Neal Anderson, Meinheit, Donald F.

Abstract: Formal concrete anchorage design provisions first appeared in ACI 318-02 as Appendix D, with applications limited to cast-in-place anchors and post-installed mechanical expansion anchors. The codified design provisions represented a...