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
| 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.
| Apr 24, 2013
New Mexico court strikes down move to repeal energy codes
The New Mexico State Court of Appeals struck down an attempt to repeal energy-efficient building codes.
| Apr 24, 2013
Los Angeles may add cool roofs to its building code
Los Angeles Mayor Antonio Villaraigosa wants cool roofs added to the city’s building code. He is also asking the Department of Water and Power (LADWP) to create incentives that make it financially attractive for homeowners to install cool roofs.
| Apr 17, 2013
Army's FY 2014 $130 billion budget includes $2.3 billion for construction
The U.S. Army submitted a $129.7 billion budget for fiscal year 2014, $2.3 billion of which is allocated for military construction, army family housing, and base realignment and closure.
| Apr 17, 2013
Leonardo Academy to develop sustainability master plan standard
Leonardo Academy launched the development of a standard for sustainability master plans using the American National Standards Institute (ANSI) process to define sustainability goals and achievements for regions, states and campuses.
| Apr 17, 2013
Fenestration Council allows some shading system, dynamic glazing to be rated for U-Factor
The National Fenestration Rating Council (NFRC) approved changes to its NFRC 100 and NFRC 200 standards, allowing certain shading devices to be rated for U-factor and Solar Heat Gain Coefficient.
| Apr 17, 2013
LEED 2009 quarterly interpretations, addenda now available
Quarterly interpretations and addenda to the LEED 2009 rating systems and reference guides are now available.
| Apr 17, 2013
DOE’s Lawrence Berkeley Lab researchers developing new indoor air pollution standards
The U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) researchers are working on new building standards after discovering previously unknown indoor air pollutants.
| Apr 16, 2013
RMJM acquired by Duthus Investments for £12 million
Sir Fraser Morrison, the owner and chairman of architect RMJM, is the backer behind the investment firm that bought RMJM for £11m in late March.
