August 30, 2005

September 11 2001, Airliner Crash into the Pentagon

By: Donald Dusenberry, Mlakar, P.F., Harris, J.R., Haynes G.A., Phan, L.T., Sozen, M.A.

Abstract: The Pentagon was constructed between September 1941 and January 1943. A substantial renovation of the entire 6.6 million sq ft (610,000 sq m) facility began in 1999 and was scheduled for completion in 2010. On September 11, 2001, a...

Services:Structural Investigation
Markets:Office
Keywords:Blast Analysis & Resistance, Collapse, Extreme Environments/Structures, Fire
August 30, 2005

Toughness of the Pentagon Structure

By: Donald Dusenberry, Mlakar, P.F., Harris, J.R., Haynes G.A., Phan, L.T., Sozen, M.A.

Abstract: On September 11, 2001, the reinforced concrete structure of the Pentagon Building was able to resist, without collapse, the impact of a large commercial airliner despite the total loss of 26 columns and severe damage to 15 columns at...

Services:Structural Investigation
Markets:Office
Keywords:Blast Analysis & Resistance, Collapse, Extreme Environments/Structures, Fire
August 30, 2005

Conclusions and recommendations from the Pentagon crash

By: Donald Dusenberry, Mlakar, P.F., Harris, J.R., Haynes, G.A., Phan, L.T., Sozen, M.A.

Abstract: The devastation in the September 11, 2001 terrorist attack on the Pentagon was reduced by the building's resilient structural system. The continuity, redundancy, and energy-absorbing capacity embodied in this system should be...

Services:Structural Investigation
Markets:Office
Keywords:Blast Analysis & Resistance, Collapse, Extreme Environments/Structures, Fire
August 30, 2005

A 60 Year Retrospective

By: Cash, Carl G.

Abstract: The roofing industry has changed dramatically in the last 60 years. This interval saw new materials, new manufacturing and installation methods, and the decline and loss of some of our oldest and best standbys. Let us try and look at...

Services:Building Enclosure Design, Building Enclosure Investigation, Building Enclosure Rehabilitation, Materials Investigation
Keywords:Roofing
August 30, 2005

Take That: The Art of Borrowing from Elsewhere

By: Matthew Bronski

Abstract: The history of architecture has been largely a history of borrowing and adapting forms, styles, materials, and techniques from elsewhere, from other places and other times.

Services:Building Enclosure Rehabilitation, Structural Rehabilitation
Keywords:Historic
August 30, 2005

Description of Structural Damage Caused by the Terrorist Attack on the Pentagon

By: Donald Dusenberry, Mlakar, P.F., Harris, J.R., Haynes G.A., Phan, L.T., Sozen, M.A.

Abstract: On September 11, 2001, an airliner was intentionally crashed into the Pentagon. It struck at the first elevated slab on the west wall, and slid approximately 310ft (94.5m) diagonally into the building. The force of the collision...

Services:Structural Investigation
Keywords:Blast Analysis & Resistance, Collapse, Extreme Environments/Structures, Fire
August 30, 2005

Response to Fire Exposure of the Pentagon Structural Elements

By: Donald Dusenberry, Mlakar, P.F., Harris, J.R., Haynes G.A., Phan, L.T., Sozen, M.A.

Abstract: An overview of fire damage sustained by the Pentagon structural elements in the September 11, 2001, terrorist attack is provided. The fire intensity in some compartments of the affected areas inside the Pentagon was approximated to be...

Services:Materials Investigation, Structural Investigation
Markets:Office
Keywords:Blast Analysis & Resistance, Failure Investigation, Fire, Metal, Metal-Steel, Thermal
July 30, 2005

Live load distribution widths for reinforced concrete box sections

By: Jesse Beaver, McGrath, Timothy J., Atis Liepins

Abstract: AASHTO introduced the AASHTO "LRFD Bridge Design Specifications" in 1994. These load and resistance factor design (LRFD) specifications included new provisions for distributing live loads to reinforced concrete bridge decks...

Services:Structural Design
Markets:Bridge, Highway & Tunnel
Keywords:Bridge, Major Vehicular, Codes & Standards, Concrete, Culverts and Storm Drains, Finite Element Analysis
May 30, 2005

Building Design for Abnormal Loads and Progressive Collapse

By: Donald Dusenberry, Ellingwood B.R.

Abstract: A progressive collapse is a structural failure that is initiated by localized structural damage and subsequently develops, as a chain reaction, into a failure that involves a major portion of the structural system. The collapse of the...

Services:Structural Design, Structural Investigation
Keywords:Codes & Standards, Collapse, Failure Investigation, Failure Risk Assessment
May 30, 2005

Finding a Better Measure of Fenestration Performance:  An Analysis of the AAMA Condensation Resistance Factor

By: Sean OBrien

Abstract: As architectural products become more advanced, making comparisons between them becomes more difficult for designers. This is especially true in the case of fenestration products (e.g., windows, skylights, and curtain walls). The...

Services:Building Enclosure Design
Keywords:Curtain Wall, Moisture Control, Thermal, Walls, Windows

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