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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.
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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: Responses of Random-Oriented-Fiber and Neoprene Bearing Pads Under Selected Loading Conditions
Author(s): Alex Aswad and Leonard Tulin
Publication: Special Publication
Appears on pages(s): 85-112
Keywords: abrasion; bearings; compression tests; cyclic loads; fibers; neoprene; pads; plastics, polymers, and resins; shape factor; shear modulus; shear tests; stiffness; Structural Research
Abstract:Random-oriented-fiber (ROF) and neoprene bearing pads were subjected to cyclic compression and shear loading in an effort to determine their characteristics when used as bearing pads for precast parking decks. The cyclic test program included specimens in the thickness range of ¬ to « in. These specimens were subjected to compressive stress normal to the pad with both parallel and nonparallel platens and then were cycled up to 5500 times to a maximum shear strain of 70 percent their thickness. Apparent shear moduli and coefficients of lateral resistance were determined for these specimens. In addition, a few samples were tested in cyclic compression to 1500 psi and in monotonic compression to 8500 psi. The results are tabulated for easy reference. Quality control information was extracted from the manufacturer's test reports and is summarized in an appendix. Estimates of reaction displacements and rotations due to shrinkage, creep, temperature gradient, and load for a typical twin-tee are also included in an appendix.
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