Research at Case Western Reserve University has found that buildings that rock during an earthquake and return to plumb would withstand seismic shaking better than structural designs commonly used today in vulnerable zones of California and elsewhere.
Those buildings would also be more easily and cheaply repaired and could be put back into use faster, said Michael Pollino, an assistant civil engineering professor at Case School of Engineering. The computer model research suggests optimal sizes for damping devices and steel yielding devices that dissipate the energy of a quake.
Pollino’s model compares rocking steel-braced frames to current earthquake standards used in low- to mid-rise buildings. "Currently, engineers are designing low-rise structures for an earthquake that has a 10% chance of occurring in a 50-year-lifetime," Pollino said. "We accept there will be damage, but no collapse or loss of life. But what about an event that has a 50% chance of occurring? You may still have to tear the building down afterward.”
Pollino and other researchers are finding advantages to the design, which has not yet made it into practice. He and colleagues are discussing forming a technical committee of civil engineers that would advance the technology into practice. Pollino is now applying for funding to begin physically testing designs in the university's structures laboratory.
Related Stories
| Aug 27, 2014
Turkish government orders demolition of residential towers in Istanbul
Citing negative effects to a world heritage site, the Turkish central government has ruled that the recently completed OnaltiDokuz Residence towers must be demolished.
| Aug 21, 2014
Industry groups agree to streamline green building tool coordination and development
Major building industry groups the International Code Council (ICC), ASHRAE, the American Institute of Architects (AIA), the Illuminating Engineering Society of North America (IES), and the U.S. Green Building Council (USGBC) have agreed to collaborate on the development of Standard 189.1, the International Green Construction Code (IgCC), and the LEED green building program.
| Aug 21, 2014
Performance-based zoning: U.S. cities starting to loosen zoning regulations
Driven by New Urbanism, more than two dozen communities in the U.S. have loosened zoning restrictions in recent years.
| Aug 21, 2014
Meeting to finalize amendments to green property underwriting standard
The National Public Meeting for Resiliency + Infrastructure Consensus Underwriting Standard Amendments will take place September 16, from 9 a.m.-12p.m. at Perkins+Will, 1250 24th St. NW, Washington, DC in the World Wildlife Fund Building.
| Aug 21, 2014
American Iron and Steel Institute revises 14 test standards
The American Iron and Steel Institute (AISI) published 14 revised test standards in its S900-series.
| Aug 14, 2014
Mississippi county rejects adoption of state building code
The county board of supervisors voted unanimously to opt out of the state building code.
| Aug 14, 2014
Boards at odds over North Carolina county’s CM-at-Risk policy
Some local small contractors are not pleased with the school board’s CM-at-Risk policy that was instituted in 2007. The county’s board of commissioners has offered a sympathetic ear to their complaints
| Aug 14, 2014
2014 National Electrical Code now effective in 12 states; 11 more to come online by January
The National Fire Protection Association (NFPA) says that the 2014 edition of the National Electrical Code(NEC) is now effective in 12 states: Alabama, Colorado, Idaho, Maine, Massachusetts, Minnesota, New Mexico, Rhode Island, South Dakota, Vermont, Washington and Wyoming.
| Aug 14, 2014
CDC report highlights need for heat acclimatization to prevent worker deaths
CDC supports OSHA’s analysis suggesting that the primary risk factor for heat fatalities is the lack of acclimatization programs.
| Aug 8, 2014
California revives study of earthquake faults
California reinstituted an ambitious plan to study dangerous earthquake faults and create zoning maps that could restrict development.
