Design for Lateral Loads/Systems
335954 - Proof Testing of Structures Retrofitted with Advanced Composite Systems – Surviving a M7.8 Earthquake
Friday, April 20
11:00 AM - 12:30 PM
Advanced composite materials have been used in various retrofit and rehabilitation projects for over 25-years but in few instances have they been truly proof tested by mother-nature. A rare opportunity occurred on November 14, 2016 when the M7.8 Kaikoura earthquake hit near Wellington New Zealand and set off over 900 aftershocks. We received word that the severe ground displacements had caused damage to areas that contain structures that had been retrofitted with our advanced composite systems. Our local personnel surveyed some of the damage near an office building that was affected. The office building, Shed 39, not only survived the event, but was also fit to remain in service. An adjacent building that was only 10-years old will be demolished due to the sustained damage and several other nearby buildings were taken out of service due to safety concerns. The retrofit of the building included unique detailing that involved advanced composite anchors along with a technique to allow for movement across construction joints. We had worked with the engineers of record to modify the details such that they achieved the design goals but were also able to be constructed in the field. This presentation will highlight the building structures that were proof tested and quickly review the various design and detailing approaches that helped these structures survive.
This topic is of international interest. The target audience is the structural engineering community. The audience will learn about the design and installation of advanced composite anchorage (fiber anchors), along with some different uses of these anchors. The audience will gain a better understanding of the practical applications of advanced composites and, perhaps more importantly, gain added confidence based on the successful performance of the system during a major seismic event.