Bridge Management, Inspection and Sustainability

Full Session with Abstracts

335554-3 - Friction’s Contribution to Maximizing the Life-Cycle of Structures

Saturday, April 21
8:00 AM - 9:30 AM
Location: 203A

Because of continued depletion of natural resources and the impact of carbon emissions on the environment, it is essential that buildings and bridges perform optimally with minimal damage when subjected to abnormal loading demands. Today’s building codes are focused on life-safety not performance. With the support of research and practice, codes of the future will specifically address minimum expected levels of performance and perhaps will require structures to behave with limited damage when subjected to extreme loadings such as seismicity.

Friction historically has been used as a means of controlling behavior of structures through devices such as seismic isolators (for instance, friction pendulum isolators) at the base of buildings but rarely, if ever, has friction been used to control behavior in building frames. Friction can be used to dampen structures as well as to allow the dissipation of energy through heat. What is most important about the use of friction is that devices can protect neighboring structural elements from damage.

Pin-fuse seismic systems have been under development for the last few years and are currently under review by the AISC Connection Pre-qualification Review Panel (CPRP). These systems include devises incorporated into building frames to dissipated energy during the earthquake, dampen the structure, alter the building’s period, allow the structure to remain essentially elastic in a major seismic event, and allow the structure to remain in service after the event.

This paper will present the latest breakthroughs of confirming the performance of non-metallic friction materials, proposed applications of the devices in building projects both new and retrofitted, a summary of the CPRP process, and full-scale testing performed to date and future testing.

Mark Sarkisian

Skidmore, Owings & Merrill LLP

Mark P. Sarkisian, PE, SE, LEED, BD+C, is the Partner of Seismic and Structural Engineering in the San Francisco office of Skidmore, Owings & Merrill LLP. His career has focused on developing innovative structural engineering solutions for over 100 major building projects—several among the world’s tallest—including the 421 meter-tall Jin Mao Tower in Shanghai, China; the 337 meter-tall Tianjin World Financial Center, Tianjin, China; the 412 meter-tall Al Hamra Fidrous Tower, Kuwait City, Kuwait; the US Embassy in Beijing, China; and the Cathedral of Christ the Light, Oakland, California. Mark holds nine U.S. Patents and five International Patents for high-performance seismic structural mechanisms designed to protect buildings in areas of high seismicity and for seismic and environmentally responsible structural systems. He has written and published a book titled “Designing Tall Buildings – Structure as Architecture,” and he teaches Integrated Studio Design courses focused on collaborative design opportunities that include students from the University of California, Berkeley, California College of the Arts, Stanford University, California Polytechnic State University, Northeastern University, North Carolina State University, and the Pratt Institute. He received his BS Degree in Civil Engineering from the University of Connecticut where he is a Fellow of the Academy of Distinguished Engineers, his MS Degree in Structural Engineering from Lehigh University, and an Honorary Doctorate Degree from Clarkson University.


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335554-3 - Friction’s Contribution to Maximizing the Life-Cycle of Structures

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