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
| May 9, 2013
Post-tornado Greensburg, Kan., leads world in LEED-certified buildings per capita
Six years after a tornado virtually wiped out the town, Greensburg, Kan., is the world's leading community in LEED-certified buildings per capita.
| May 9, 2013
SMACNA’s new HVAC sound and vibration guide open for public review
Sheet Metal and Air Conditioning Contractors National Association’s (SMACNA’s) new “HVAC Systems Sound and Vibration Guide” is available for a 45-day public review.
| May 9, 2013
NSF Sustainability launches VOC emissions testing, certification for commercial furniture industry
New program offers sustainable certification and indoor air quality testing for commercial furniture makers.
| May 1, 2013
House bill would give OSHA more authority over state workplace-safety plans
A recently introduced U.S. House of Representatives bill would give the Occupational Safety and Health Administration (OSHA) more authority over state workplace-safety plans and toughen penalties for companies that knowingly violate OSHA regulations.
| May 1, 2013
New commercial landlord disclosures go into effect in California in July
Two new landlord disclosure requirements become effective in California on July 1, 2013.
| May 1, 2013
New ASHRAE residential indoor air quality standard adds carbon monoxide alarm requirement
The new 2013 version of ASHRAE’s residential indoor air quality standard adds a requirement for carbon monoxide alarms.
| May 1, 2013
AAMA publishes standard for multipoint locking hardware for side-hinged doors
The American Architectural Manufacturers Association (AAMA) recently published the first North America standard for multipoint locking hardware for side-hinged door systems.
| Apr 24, 2013
‘W visa’ program could hamper construction industry's growth
The Senate’s bipartisan immigration reform proposal will provide interim legal status to some 11 million undocumented people.
| Apr 24, 2013
North Carolina bill would ban green rating systems that put state lumber industry at disadvantage
North Carolina lawmakers have introduced state legislation that would restrict the use of national green building rating programs, including LEED, on public projects.
| Apr 24, 2013
BOMA’s 360 Performance Program approaches 600 building designees
The Building Owners and Managers Association (BOMA) International conferred the BOMA 360 Performance Program® designation upon 44 properties in major commercial real estate markets across the U.S. in the first quarter of 2013.