PROJECT

GRANTEE

PROJECT AREA

GRANT #

AWARD AMOUNT

GRANT PERIOD

GRANT STATUS

PRINCIPAL INVESTIGATORS

INDUSTRY CHAMPIONS

CPF ALLIES

RESEARCH PURPOSE

Reinforced Concrete Link Beams

UCLA

Structural Engineering

04-06

$200,000

Apr 2006 - Aug 2009

In Progress

Professor John Wallace

Ron Klemencic, President, Magnusson Klemencic Associates

To develop and codify a new detailing option which aims to improve the constructability of diagonally reinforced coupling (or link) beams for tall building construction to resist earthquake loads while maintaining adequate strength and ductility. Construction of coupling beams that satisfy the strength and detailing requirements set forth in ACI 318-05 for diagonally reinforced coupling beams has proven cumbersome and costly. Test results from this project indicate that the new detailing approach provides equal if not improved behavior as compared to the alternative detailing approach; that simple modeling approaches reasonably capture measured force versus deformation behavior, and that including a reinforced and post-tensioned slab had only a modest impact on strength, stiffness, ductility, and observed damage. The outcomes of this research were incorporated in the new ACI 318-08 published in January, 2008, which reflects a remarkable project duration of only 21 months from grant award to ultimate codification.

Border.jpg

DOWNLOADS

There are no downloads available at this time.

Border.png