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Current Research:
Inspection Methods & Techniques to Determine Non Visible Corrosion of Prestressing Strands in Concrete Bridge Components
Daniel P. Jenny PCI Fellowship: Analytical Assessment of the Resistance of Precast Strucutres to Blast Effects
Development of a Seismic Design Methodology for Precast Diaphragms
Development of a Welding Procedure Specification for Field Welding of Precast Concrete Connections
Use of Polyurea for Blast Hardening of Concrete Construction
Estimation of Concrete Respone Under Varying Confinement
Evaluation of Bond Mechanics in Prestressed Concrete Applications
Horizontal Shear Capacity of Composite Beams Without Ties
Lateral Resistance of Plywood and Oriented Strand Board Sheathing After Accelerated Weathering
Past Research Projects
Performance of Bulb Tees with Self Consolidating Concrete
FRP Bridge Decks with RC
Parapets
Blast Resistance of a Load
Bearing Shear Wall Building
Lehigh@NEES
Equipment Site
Reserarch Experinece for
Undergraduates
Seismic Evaluation of a Three Story
WoodFrame Apartment Building with Tuck-Under Parking
Design of RC Bridge Beam-Column
Connections
Response of Waffle Slab
Building Systems to Seismic Loads
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Blast Resistance Of A Building With Load Bearing Shear Walls
Abstract:
Recent terror events world wide have elevated the consciousness of structural design in response to blast loading. A
means of assessing a building’s response to blast loading is relevant and in growing demand. By determining a building’s
weakness to blast loads, we can better protect our buildings from terrorist actions, as well as improve designs in future
structures. A series of computer based simulations are used to evaluate the structural damage to a building
under the load of an exterior truck bomb. The building modeled is a three story, steel frame building with lateral shear wall
support. Moment connections at the interior bays allow for spans up to 40 feet. The shear walls are located around
the perimeter of the building, and are thereby vulnerable to blast loads. The floor diaphragms are concrete on metal deck,
and are supported on the shear walls.
The building details were evaluated to determine its weakest points around the perimeter. Blast loads were predicted through
the use of several specialized computer programs, designed to predict initial exterior blast pressures, as well as reflected
pressures throughout the interior of the building. Evaluation of the structural components under these loads was performed
through a series of single-degree-of freedom approximation methods in conjunction with nonlinear finite element models.
Attention was focused on the potential loss of the main structural components. This includes evaluation for the loss of
load bearing components, loss of the floor diaphragm, loss of columns, and the potential for progressive collapse. The
weaknesses present in the structural design are assessed, and recommendations for improved detailing are offered.
Research Team:
Clay Naito, Principal Investigator
Katie Payne, Graduate Student Researcher
Publications:
1. Naito, C., "Blast Resistance Research for Hardening and Survivability of Large Strucures," Abstract, Homeland
Security Advanced Research Projects Agency (HSARPA) Technology Workshop, Baltimore, MD, June, 2004.
2. C. J. Naito , M.ASCE, and K. P. Wheaton, "Blast Assessment of Load Bearing Reinforced Concrete Shear Walls,"
ASCE Practice Periodical On Structural Design And Construction, Submitted June 2005.
Page Last Updated Friday, 24-Jun-2005 18:25:51 EDT
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