The 6.3-magnitude earthquake that devastated the major New Zealand city of Christchurch on Tuesday, Feb. 22, took at least 163 lives and severely damaged much of the city's critical infrastructure. Dr. Roberto T. Leon was in Christchurch for a teaching fellowship at the University of Canterbury when the event occurred. In this talk he will describe the behavior of unreinforced masonry (URM) and reinforced concrete structures during the unusual series of events before and after this major shock. This earthquake has great lesson for USA practice. For example, the design of beam-to-column joints in reinforced concrete moment frames is one area where USA and New Zealand standards have diverged for many years. USA standards, and ACI 352 in particular, implicitly accept a high level of damage in the form of shear cracking and bar slip for joints subjected to large lateral load reversals. The New Zealand approach, since the mid- 1980s, has been to minimize that type of damage and concentrate the deformations in plastic hinges in the beams by carful detailing of the joint region. In addition to engineering information and insights, Dr. Leon will also discuss the rescue/recovery and b uilding assessment efforts in the aftermath.
Friday, March 2nd, 2012
11:00 AM EDT
The Archived version of this lecture can be viewed here: Prof. Roberto Leon Lecture
If you would like to ask questions regarding the topic being presented, you can send an e-mail to firstname.lastname@example.org during or after the presentation. If time allows, an attempt will be made to convey any questions received during the presentation to the presenter to answer live during discussions. Other questions will be collected and sent to the presenter, whose answers will subsequently be posted on this website.
Seminar sponsored by:
Please note that the above link will only be
active a few minutes before the event is scheduled to begin. An archived version
of this webcast will post posted shortly after the seminar is completed.
Contact Mr. Shomari White by email at email@example.com if you have any problems that prevent you from watching this broadcast.