January 28, 2004

Rationale Behind and Proper Application of the Ductility Factor for Bracing Connections Subjected to Shear and Transverse Loading

By: Christopher Hewitt, William A. Thornton

In 1990, AISC and ASCE jointly commissioned a task group to develop a design philosophy for predicting the strength of bracing connections. The design methods in place prior to that time were only applicable to connections made to the webs of...

Services:Structural Design
Keywords:Braced Frame, Metal-Steel, Truss
December 31, 2003

Analysis and performance of PCCP Mortar Coating

By: Mauro Scali, Paul Scheiner, Rasko Ojdrovic, Mehdi Zarghamee, Aquino W.

Abstract: The evaluation of cement mortar coatings on prestressed concrete cylinder pipes (PCCP) may include such techniques as petrographic examination, material testing, and environmental testing of soil and groundwater. Petrographic analysis...

Services:Materials Investigation
Markets:Water/Wastewater
Keywords:Concrete, Corrosion, Laboratory Testing and Analysis, Materials Analysis, Petrography, Pipeline
June 1, 2001

Under the Microscope

By: Paul Kelley, Glenn Bell, Michael Brainerd, Mauro Scali

Abstract: Forensic engineering is typically more complex than engineering design because it requires the integration of specialized knowledge of materials science, structural analysis and design, and construction...

Services:Materials Investigation, Structural Investigation
Keywords:Concrete, Laboratory Testing and Analysis, Masonry, Materials Analysis, Petrography
December 13, 1998

Specifying Air Entrainment

By: Michael Brainerd, Mauro Scali, Paul Kelley

Abstract: Air entrainment can prevent cyclic freeze-thaw damage to concrete over a reasonable service life if coupled with a strong cement paste with low permeability. This article discusses how to correctly specify air entrainment, including...

Services:Structural Rehabilitation
Keywords:Concrete, Freeze-Thaw, Petrography

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