Lightweight FIBRWRAP Composite Materials For Shear Enhancement In The Seismic Retrofitting Of Non-Ductile Reinforced Concrete Construction

摘要

This paper outlines the unique application of lightweight fiberwrap composite materials in the recently-completed seismic retrofitting of the seventeen (17) storied ～175,000 gsf Radisson Huntley Hotel (Project), Santa Monica, California. The adoption of Ordinance #1748 by the City of Santa Monica mandated seismic retrofitting of a scope and proportion to essentially satisfy the intent of the seismic provisions set forth in the "current" Uniform Building Code. Of prime concern in this case was a need to enhance the prevailing shear strength capacities of the building perimeter wall piers and spandrels to a degree that would increase ductility and preclude any potential for brittle shear-type failure during future adverse seismic disturbances. The selection of lightweight fiberwrap technology in this case was driven by a need to maintain normal hotel operations during seismic retrofit construction and to minimize the seismic retrofit construction cost impact, noise and discomfort to guests. Their application resulted in no appreciable increase in the seismic weight or lateral stiffness of the structural system, thereby ensuring a cost-effective seismic retrofit upgrade.