By
John McLellan
February 19, 2010
One of the tests in progress at the Structural Research Laboratory in More Hall attempts to address the problem of bridge construction time. The project seeks to show that a new design for the rapid construction of bridges on-site performs as well or better than the current code-compliant design. The project, funded by the Federal Highway Administration through the Highways for Life program, was designed and fabricated at the UW with help from the Washington State Department of Transportation and the construction industry.
Photo by John McLellan.
Structural-engineering graduate student Olafur Haraldsson takes a closer look at the specimen’s cracking and spalling. Haraldsson is using the project for his thesis.
Photo by John McLellan.
Structural-engineering graduate students Hung Tran and Stuart Stringer look at cracking along the interface between the foundation and the pillar.
Photo by John McLellan.
Before: The specimen is coated white so that cracking is easily visible; a grid is superimposed to allow for the location of cracking to be recorded.
Photo by John McLellan.
After: The red and blue lines distinguish crack formation by the direction the pillar was stressed and are marked with the cycle number of testing on which they were generated or propogated. The internal failed steel reinforcement is visible after the external concrete breaks off.
Photo by John McLellan.
Structural-engineering graduate student Hung Tran draws the location of propogating cracking and spalling; the test is designed to push the speciment to its critical failure point.
Photo by John McLellan.
Structural-engineering graduate student Tyler Winkley checks the diameter of a crack near some of the instrumentation mounted on the specimen.
Photo by John McLellan.
Part of the control interface used in the test. The readout at the top shows a displacement of 1.131 inches under a load of 43.89 kips (thousand pounds force).
Photo by John McLellan.
One of the elements of the test is the non-standard foundation with a cavity to allow the specimen to potentially fail due to the top load.
1 Comment
#1 Brynja
on February 19, 2010 at 10:51 a.m.Alltaf flottur oli minn Daði er eitthvað að rofla um steypuna ekki nogu sterk bara joke frabært hja þer.
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