Laboratory Simulation Of Blast Loading On
Building And Bridge Structures
Author(s)
M. M. Gram, A. J. Clark, G. A. Hegemier & F. Seible
Abstract
There is a need to modify structural elements of buildings and bridges in order to
improve the response to blast loads. Testing the modifications has been a major
stumbling block to advances. Failure modes resulting from a 1 to 10 ms blast
impulse are substantially different from the failure modes obtained with
conventional laboratory structural tests. Field tests using actual explosions are
expensive, are not repeatable, and the fireball makes visual and video viewing
impossible and reliable real-time data very difficult to obtain.
The University of California, San Diego and MTS Systems Corporation were
funded to design and build a system able to perform laboratory blast simulations.
The system, which was completed in 2005 at UCSD, has been used to test
modified and unmodified reinforced structures including: concrete columns
355 mm square by 3 m high; and concrete block walls 200 mm thick by 3 m
high. By January 2006, over 20 specimens were tested, with specimen failure
modes matching the failure modes from field tests. The system uses impact
loading to produce a 2 ms pulse with a typical peak pressure loading of 35 MPa
and an impulse of 14 kPa-s over the surface of the column. The system allows
observation of the test in person and by high-speed video, as well as successful
instrumentation of the specimen.
This paper describes the blast simulation system and its capabilities.
Keywords: blast simulator, blast hardening, blast mitigation, infrastructure
protection.
Keywords
blast simulator, blast hardening, blast mitigation, infrastructureprotection.
Related Book
Other papers in this volume
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