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
| Apr 26, 2012
New York City Council moves to license elevator mechanics
New York’s City Council introduced a measure last week that would require the city’s 7,000 elevator mechanics to meet national standards and be licensed by the city.
| Apr 23, 2012
AAMA releases updated specification for anodized aluminum
AAMA 611-12 describes test procedures and requirements for high performance (Class I) and commercial (Class II) architectural quality aluminum oxide coatings applied to aluminum extrusions and panels for architectural products.
| Apr 19, 2012
Michigan legislature tackling controversial rules on electricians
A fight is brewing in the Michigan legislature over how many fully qualified electricians must be present during electrical work when apprentices also are on hand.
| Apr 19, 2012
Washington city may base building code on rising sea level due to global warming
Aberdeen may become the first city in Washington to base a building code on rising oceans and global warming.
| Apr 19, 2012
CSI webinar on energy codes and building envelopes
This seminar will review recent changes in energy codes, examples of building enclosure wall assemblies for code compliance, potential moisture management and durability challenges, and design tools to assess and minimize potential problems.
| Apr 19, 2012
Innovative plan for storm water in Philadelphia gets EPA’s OK
Philadelphia's $2 billion plan to manage its storm water with green methods including porous pavement, green roofs, and more trees, was officially approved last week by the U.S. Environmental Protection Agency.
| Apr 19, 2012
LEED 2012 to include new credit category for transit-oriented development
The updated LEED 2012 system will introduce a new credit category, “Location and Transportation,” to encourage development oriented around public transit and more walkable communities.
| Apr 17, 2012
FMI report examines federal construction trends
Given the rapid transformations occurring in the federal construction sector, FMI examines the key forces accelerating these changes, as well as their effect on the industry.
