American Concrete Institute

About: American Concrete Institute is a nonprofit organization based out in Farmington Hills, Michigan, United States. It is known for research contribution in the topics: Fiber-reinforced concrete & Ultimate tensile strength. The organization has 35 authors who have published 5 publications receiving 442 citations. The organization is also known as: ACI & National Association of Cement Users.

Effect of Cyclic Loading on the Residual Tensile Strength of Steel Fiber–Reinforced High-Strength Concrete

Abstract: This paper evaluates variations in the residual tensile strength of prismatic specimens made of steel fiber–reinforced high-strength concrete (SFRHSC) attributable to flexural cyclic loading. All specimens were previously subjected to a three-point static bending load test until the first flexural crack appeared. In these cases, no notched specimens were used. Next, the specimens were subjected to a preset number of three-point cyclic bending loads, without fatigue failure in any case. Finally, the specimens were submitted to a three-point static load test until failure. This test procedure shows a progressive decrease in the residual tensile strength with the number of cycles. A new definition of damage is introduced: relative variation of the tensile strength with the number of cycles. A correlation is identified between conventional damage and this new definition of damage.

Security Barrier Design

Abstract: After a brief introduction on vehicle barriers in general, the writers present a rational basis of determining a design force on security barriers. The design force is derived from rigid barrier impact deceleration values culled from published literature on vehicles with similar kinetic energy. The Appendix provide a summary of references for further study.