Gustavo J. Parra-Montesinos is coming to the rescue of concrete-frame designers and contractors in earthquake country, long bedeviled by rebar-congested coupling beams that span openings in seismic ...

A recent series of dynamic tests demonstrates that there are several types and doses of steel-fiber reinforcement that can be used in performance-based seismic design of coupling beams—headers that ...

The ACI Foundation is pleased to announce the completion of a new research product: Evaluation of Seismic Behavior of Coupling Beams with Various Types of Steel Fiber Reinforced Concrete. Gustavo J.

An engineer's solution for streamlining the construction of skyscrapers is having a skyscraper moment in one of the most seismically active regions of the country. All coupling beams in the 1.5 ...

Understanding how helical, curved beams operate — how their spiral cuts accommodate angular and parallel misalignment, axial motion, and system vibrations — is the key to knowing how they will perform ...