[net-gold] COUNTRIES: HAITI : DISASTERS: EARTHQUAKES : ARCHITECTURE : ENGINEERING: Haiti Earthquake Revealed the Terrible Cost of Poor Building Design

  • From: "David P. Dillard" <jwne@xxxxxxxxxx>
  • To: Net-Gold <Net-Gold@xxxxxxxxxxxxxxx>, Temple University Net-Gold Archive <net-gold@xxxxxxxxxxxxxxxxxxx>, Temple Gold Discussion Group <TEMPLE-GOLD@xxxxxxxxxxxxxxxxxxx>, Net-Gold <net-gold@xxxxxxxxxxxxxxxx>, Sean Grigsby <myarchives1@xxxxxxxxxxxxxxx>, Educator Gold <Educator-Gold@xxxxxxxxxxxxxxx>, Educator Gold <Educator-Gold@xxxxxxxxxxxxxxxx>, K12AdminLIFE <K12AdminLIFE@xxxxxxxxxxxxxxx>, Net-Platinum <net-platinum@xxxxxxxxxxxxxxx>, "Net-Gold @ Nabble" <ml-node+3172864-337556105@xxxxxxxxxxxxx>, MediaMentor <mediamentor@xxxxxxxxxxxxxxx>, Digital Divide Diversity MLS <mls-digitaldivide@xxxxxxxxxxxxxxx>, net-gold@xxxxxxxxxxxxx
  • Date: Fri, 29 Jan 2010 17:46:58 -0500 (EST)



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COUNTRIES: HAITI :
DISASTERS: EARTHQUAKES :
ARCHITECTURE :
ENGINEERING: Haiti Earthquake Revealed the Terrible Cost of Poor Building Design




Haiti Earthquake Revealed the Terrible Cost of Poor Building Design Saturday, January 30, 2010
Washington Post
<http://www.washingtonpost.com/wp-dyn/content/ article/2010/01/28/AR2010012804745.html>



A shorter URL for the above link:



<http://tinyurl.com/yc6mpfw>



The sight of thousands of collapsed structures in Port-au-Prince, Haiti, may lead you to wonder whether a strong earthquake could cause equally widespread, catastrophic building collapse in an American city.

Fortunately, diligent engineering, up-to-date building codes and sound construction techniques ensure that many structures in America would withstand earthquake forces. But could some of our buildings, especially old ones, be vulnerable if seismic forces are sufficiently strong?

Age, per se, does not determine earthquake survivability, which instead depends on the inherent strength of a building's overall structural framework. Old or new, any poorly engineered or cheaply constructed building always will be vulnerable to severe earthquake-induced damage or collapse.

Despite their age, many historic buildings can withstand the assaults of Mother Nature thanks to massive masonry bearing walls, thick masonry or wood columns, sturdy roof and floor beams, and, equally important, robust connections tying together the structural elements. Connections are critical to ensuring that a building's framework is unified and stable.

Of course, we rarely construct buildings as we did in past centuries. Therefore, how do we ensure that buildings erected today using modern construction materials and techniques will successfully withstand earthquakes?

Successfully resisting seismic forces can be accomplished in several ways: making a building sufficiently rigid, making a building sufficiently flexible or isolating a building from movement of the earth.

Columns and bearing walls support a building by resisting the vertical force of gravity and carrying a building's weight to the ground. But earthquakes, like hurricanes, generate intense horizontal forces that shake and deform buildings, seriously overstressing a building's structure.





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The complete article may be read at the URL above.





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  • » [net-gold] COUNTRIES: HAITI : DISASTERS: EARTHQUAKES : ARCHITECTURE : ENGINEERING: Haiti Earthquake Revealed the Terrible Cost of Poor Building Design - David P. Dillard