In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Chat with Us Online Now
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Full Size Test of an AASHTO Type IV Bridge
Author(s): Ignacio Martin
Publication: Concrete International
Appears on pages(s): 36-41
Keywords: beams (supports); bridges (structures); cracking (fracturing); deflection; failure; failure mechanisms; flexural strength; girders; loads (forces); precast concrete; prestressed concrete; research; safety factor; strains
Abstract:Cracks in AASHTO Type IV precast bridge beams cast doubts on the strength of these precast prestressed concrete products. It was decided to test one of these beams to failure. As the strength of the precast beam was questioned, the test was limited to the girder without the deck slab. This facilitated the test setup because it was necessary to apply smaller loads to fail the beam, but the type of failure to be expected was a sudden compression failure rather than the ductile tension failure that would be expected of the beam in the bridge. Static loads to simulate the dead load, live load, and twice the live load were applied to the beam, using three concentrated loads. Failure was induced by subjecting the beam to a monotonically increasing equivalent uniform loading. The beam behavior during the test was excellent, as evidenced by the measured deflections, section rotations, end rotations, and crack pattern and distribution. The beam failed at a bending moment 13 percent higher than the predicted failure moment for design conditions. The cracks at the ends of he beam did not increase or progress during the test. It may be concluded that the tested beam behaved as predicted by prestressed concrete theory.
Click here to become an online Journal subscriber