The American Institute of Steel Construction (AISC) recently issued a draft of AISC 341, a standard that provides guidance on designing earthquake-resistant steel buildings and it is available for public comments.
The draft standard incorporates new design limits for steel columns based on research conducted by the National Institute of Standards and Technology (NIST) and the University of California San Diego. Using a shake table, researchers identified deficiencies in the performance of a certain type of column, with many test assemblies buckling prematurely.
Based on the findings, the researchers devised new limits for the cross-sectional slenderness of steel columns. “A lot of current design provisions are based on scaled-down column tests or a very small number of full-scale tests,” said NIST structural engineer John Harris in a news release. “But the full-scale testing we conducted has allowed us to begin filling in the knowledge gap regarding the performance of these kinds of columns under extreme loading conditions.”
The draft includes new slenderness limits on columns, with structural steel webs—sized according to the new limit—that could meet drift and stability requirements at the same time. The more stringent limits on steel column webs could soften the blow of earthquakes, potentially saving newly designed buildings from unnecessary damage or partial collapse.
Related Stories
| Jul 26, 2012
Wisconsin may establish stormwater storage requirement for green roofs
Green roofs and other green infrastructure would be required to capture stormwater under a draft state wastewater discharge permit from the Milwaukee Metropolitan Sewerage District.
| Jul 26, 2012
SouthPark Mall in Charlotte reopens after heavy rains collapse part of its roof
Code enforcement officials in Charlotte, NC gave the okay for the SouthPark Mall to reopen after two parts of its roof collapsed following heavy rains last week.
| Jul 26, 2012
New NRCA photovoltaic roof systems guidelines released
The National Roofing Contractors Association’s update of its Guidelines for Roof Systems With Rooftop Photovoltaic Components is now available.
| Jul 26, 2012
DOE/ASHRAE design guide aims to cut energy use at hospitals, schools, retail stores
The Advanced Energy Design Guidelines from the Department of Energy and the American Society of Heating, Refrigerating and Air Conditioning Engineers aims to provide ways for hospitals, schools, and large retail buildings to trim their energy consumption by 50%.
| Jul 19, 2012
Bayview Property Managers agrees to record $800,000 building code fine
A San Francisco property-management company has agreed to pay a record $800,000 civil fine for hundreds of building code violations at rental properties.
| Jul 19, 2012
Glass ‘biodome’ helps Parkview Green FangCaoDi project in Beijing achieve LEED Platinum
A glass envelope acting as a kind of biodome encapsulates four mixed-use towers at Parkview Green FangCaoDi, an 800,000 sf mixed-use development in Beijing. The glass structure helped the development to achieve LEED Platinum certification.
| Jul 19, 2012
UMass-Boston's Bevington: 'Financing alternatives crucial to energy-efficiency upgrades'
It’s conceivable that innovation in project finance can do for building efficiency in the coming century what 30-year mortgages did for home ownership in the last, this article asserts.
| Jul 19, 2012
NYC eases building code to create ‘micro apartments’ in Kips Bay
New York City has implemented a program to encourage construction of "micro-apartments" in the Big Apple, where rents are exorbitant and the number of singles is on the rise.
| Jul 19, 2012
NRCA: Roofing insulation performance, local climate keys to computing R-value
To minimize the loss of thermal resistance in design, the R-value of roof insulation should be computed based on the actual performance of the insulation material and the local climate, says the National Roofing Contractors Association.
| Jul 16, 2012
Business school goes for maximum vision, transparency, and safety with fire rated glass
Architects were able to create a 2-hour exit enclosure/stairwell that provided vision and maximum fire safety using fire rated glazing that seamlessly matched the look of other non-rated glazing systems.
