Seismic Performance of Bridge Systems with Conventional and Innovative Design
Web site: http://nees.unr.edu/4-spanbridges/
Principal Investigator: M. Saiid Saiidi (UNR)
Co-PIs: G. Fenves (UC-Berkeley) A. Elgamal (UC-San Diego)
A. Mirmiran (Florida Int'l U.) I. Buckle (UNR)
Senior Personnel: A. Kiremidjian (Stanford), G. Pekcan (UNR), M. Zadeh (UNR)
The opportunity to study large-scale models of civil engineering systems was substantially expanded in 2004 by the establishment of the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) funded by the National Science Foundation. As one of the major projects in the first series of NEES research (NEESR), this study is addressing important aspects of bridge system performance. The technical focus of this study is on three approximately quarter-scale test models of four-span bridge frame supported on three shake tables at UNR. There is considerable interaction with several other universities. Bridge abutment studies, as a part of this project, will be conducted at the University of California, San Diego (UCSD) on its large outdoor shake table (LHPOST).
Objectives
The overall objectives of the project are listed below. The objective of the February 2007 shake table test at UNR is to determine the system behavior of a conventional reinforced concrete 4-span bridge subjected to uniform biaxial ground motions simulated on three shake tables and abutment actuators through hybrid testing. Detailed information about the bridge model is posted at
http://nees.unr.edu/4-spanbridges/data.html.
·
Conduct a comprehensive investigation of seismic performance of a series of large-scale four-span bridge systems including abutment effects.
·
Evaluate relative performance of components, bridge piers, and bridge systems and implications on design.
·
Incorporate innovative materials in bridge piers.
·
Use OpenSees for comprehensive evaluation of bridge models.
·
Utilize the study to promote earthquake engineering at K-12 programs.
Telepresence
Telepresence will be available in three formats:
Comparison Table
Requirements: A Media player capable of supporting the Windows Media 9 codec. For Windows users this generally means Windows Media Player 9 or greater.
Note: This link will not work until immediately before commencement of the experiment.
These alternate video streams will focus on various aspects of the structure. This will be the same video that is being recorded by our DVRs.
Requirements: A Media player capable of supporting the Windows Media 9 codec. For Windows users this generally means Windows Media Player 9 or greater.
Note: Newer versions of Windows Media Player generally cannot have more than one instance of itself running. This obviously poses a problem when viewing multiple Windows Media streams. As a workaround, we recommend launching the older Windows Media Player 6.4. To launch this player go to Start->Run and type "mplayer2". Then, from within Windows Media Player 6.4, go toFile->Open and then manually enter one of the links above (copy and paste should work).
Windows Media Player 6.4 will have to download a Windows Media 9 codec to view this stream. Provided that you have install privileges, Windows Media Player 6.4 will do this automatically (a dialog box asking if this is okay will popup).
These alternate video streams will provide lower quality video than the DVR Video Stream, but can be viewed on a standard PC with a Web Browser.
Requirements: We recommend a Mozilla based browser such as Firefox or SeaMonkey to access these video streams. Further details (reasons why) can be found here.
Comparison Table
| |
Webcast |
DVR Video Stream |
FlexTPS |
| No. of Cameras |
1
w/ multiple inputs |
2 |
5 +
test status indicator |
| Audio |
Yes |
No |
No |
| Image Quality |
Medium |
High |
Medium |
| Requirements |
Windows Media Player |
Windows Media Player |
Web Browser |
| PI Interaction |
Yes> |
No |
No |
