Memory materials help bridges withstand quakes


	Memory materials help bridges withstand quakes

jimbo1000

6-6-2008 3:34 PM

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jimbo1000 says:

US engineers use 'elastic' steel in bridges

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/832dd24b-7592-45c2-8d44-e9f82176b681/37501224-0778-49C8-8B24-57BD8BFC58CB/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.ice.org.uk/knowledge/spec_news.asp?ARTICLE_ID=2411" href="http://www.ice.org.uk/knowledge/spec_news.asp?ARTICLE_ID=2411" style="font-size: 11px;">www.ice.org.uk</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.ice.org.uk/knowledge/spec_news.asp?ARTICLE_ID=2411">Memory materials help bridges withstand quakes</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.ice.org.uk/knowledge/spec_news.asp?ARTICLE_ID=2411">A US Research team are investigating how materials science can be employed to prevent damage to bridges during earthquakes.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.ice.org.uk/knowledge/spec_news.asp?ARTICLE_ID=2411">A solution to this problem may be in sight. A research team, led by Reginald DesRoches of Georgia Institute of Technology, has used a huge quake table to demonstrate that Shape Metal Alloys (SMAs) – materials traditionally used in aerospace and robotics – can be used as an alternative to conventional steel cable ties to prevent bridge damage.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.ice.org.uk/knowledge/spec_news.asp?ARTICLE_ID=2411">The SMAs can be displaced by a large amount without damage, springing back somewhat like an elastic band.<SPAN>  </SPAN>This allows bridges to “give” at their deck joints during an earthquake, but then snap back into shape afterwards. <SPAN> </SPAN></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/37501224-0778-49C8-8B24-57BD8BFC58CB/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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