May 30, 2004

Wear Estimation of a Wheel-on-Track System for Radio Telescopes

By: Rose, Brian D., Frank Kan, Joseph Antebi, Juneja, Gunjeet

Abstract: Many radio telescopes are supported by wheel-on-track systems composed of wheel bogies and wear plates mounted on base plates. In some installations, migration of the wear plates 
has been observed between the wear and...

Services:Materials Investigation, Structural Investigation
Markets:Science & Defense
Keywords:Finite Element Analysis, Nonlinear, Telescope
May 30, 2004

Slate and Clay Tile Roofing Defy Father Time

By: Matthew Bronski

On older roofs, high-quality clay tile or natural slate frequently outlast the original metal flashings and roofing underlayment, for example, asphalt-saturated felt paper that help to make the roof watertight. The question frequently facing...

Services:Building Enclosure Rehabilitation, Materials Rehabilitation
Keywords:Roofing, Roofing, Clay Tile
May 30, 2004

Leak-tracking techniques: how to find non-roof related leaks

By: Eric Schroter

Abstract: When is interior water damage not the result of a roof leak? Wall leaks, plumbing leaks, and condensation can be interpreted as coming from the roof. How do you find the source? Visual examinations of interior and exterior surfaces...

Services:Building Enclosure Investigation
Keywords:Field Testing, Moisture Control, Roofing, Water Leakage
May 30, 2004

Structural Design of Stormwater Chambers

By: Phillip Sharff, Jesse Beaver, McGrath, Timothy J.

Abstract: Environmental Protection Agency requirements for control of stormwater runoff are increasing the need to provide on-site stormwater storage as part of site development projects. Underground stormwater storage is one solution to this...

Services:Materials Design
Markets:Water/Wastewater
Keywords:Civil: On-Site Stormwater Management, Culverts and Storm Drains, Field Testing, Finite Element Analysis, Plastic/Composite, Soil-Structure Interaction
April 29, 2004

Structural Design of Polypropylene Chambers Using Plastic Pipe Analysis, Design, and Test Methods

By: Jesse Beaver, McGrath, Timothy J., Phillip Sharff

Abstract: Plastic pipe has been used for many years in applications to control surface water runoff by detention, retention, and infiltration. Review of deficiencies with available pipe geometries resulted in creation of a new product,...

Services:Materials Design, Structural Design
Markets:Water/Wastewater
Keywords:Civil: On-Site Stormwater Management, Culverts and Storm Drains, Field Testing, Plastic/Composite, Soil-Structure Interaction, Tank
March 30, 2004

Design of steel structures for blast-related progressive collapse resistance

By: Ronald Hamburger, Whittaker, Andrew

Abstract: Structural design of steel structures in buildings to resist the effects of potential blasts is discussed. Steel building systems are found to be ideal due to the toughness of structural steel as a material and the relative ease of...

Services:Materials Design, Structural Design
Keywords:Blast Analysis & Resistance, Metal, Metal-Steel
March 30, 2004

Effects of Reference Displacement and Damage Accumulation in Wood Shear Walls

By: Jeffrey Langlois, Gupta R., Miller T.

Abstract: The objectives of this study were: (1) to evaluate the effect of reference displacement on wall behavior under fully reversed cyclic loading using the Consortium of Universities for Research in Earthquake Engineering (CUREE) test...

Services:Structural Investigation
Keywords:Analytical Studies, Failure Investigation, Laboratory Testing and Analysis, Seismic Analyses, Walls, Wood
January 30, 2004

Thrust Restraint Design of Concrete Pressure Pipe

By: Mehdi Zarghamee, Daniel Eggers, Rasko Ojdrovic, Daniel Valentine

Abstract: A finite-element model of a buried pipeline consisting of concrete pressure pipe segments and joints is developed for analysis of longitudinal effects resulting from pressure-induced thrust at a bend. The model accounts for longitudinal...

Services:Structural Design
Markets:Water/Wastewater
Keywords:Concrete, Finite Element Analysis, Pipeline, Soil-Structure Interaction
January 30, 2004

Rising to the Challenge: Roofing Rehabilitation of the New York State Capitol

By: Niklas Vigener, James Jamieson

Abstract: Consider a list of single conditions that can make any roofing project significantly more challenging:|- Complex roof geometries and conditions|- A plethora of different roofing materials|- Extremely steep roof slopes|- Difficult access...

Services:Building Enclosure Rehabilitation
Markets:Government
Keywords:Historic, Masonry-Terra Cotta, Preservation Technology , Roof Replacement, Roofing, Water Leakage
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

Pages