Loading in 2 Seconds...
Loading in 2 Seconds...
NEESR-SG: Controlled Rocking of Steel-Framed Buildings with Replaceable Energy Dissipating Fuses. Gregory G. Deierlein, Sarah Billington, Helmut Krawinkler, Xiang Ma Stanford University Jerome F. Hajjar, Matthew Eatherton University of Illinois at Urbana-Champaign
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Gregory G. Deierlein, Sarah Billington,
Helmut Krawinkler, Xiang Ma Stanford University
Jerome F. Hajjar, Matthew Eatherton University of Illinois at Urbana-Champaign
Mitsumasa Midorikawa, Hokkaido University
Toru Takeuchi, Tokyo Institute of Technology
T. Hikino, Hyogo Earthquake Engineering Research Center
David Mar, Tipping & Mar Associates andGreg Luth, GPLA
In-Kind Funding: Tefft Bridge and Iron of Tefft, IN, MC Detailers of Merrillville, IN, Munster Steel Co. Inc. of Munster, IN, Infra-Metals of Marseilles, IN, and Textron/Flexalloy Inc. Fastener Systems Division of Indianapolis, IN.
Structure and Architecture absorbs energy through damage
Large Inter-story Drifts:
Result in architectural & structural damage
Result in content damage
& loss of function
Deformed Section – Eccentric Braced Frame
Develop a new structural building system that employs self-centering rocking action and replaceable* fuses to provide safe and cost effective earthquake resistance.
*Key Concept – design for repair
Component 3 – Replaceable energy dissipating fuses take majority of damage
Component 2 – Post-tensioning strands bring frame back down during rocking
Component 1 – Stiff braced frame, designed to remain essentially elastic - not tied down to the foundation.
Bumper or Trough
Origin-a – frame strain + small distortions in fuse
a – frame lift off, elongation of PT
b – fuse yield (+)
c – load reversal (PT yields if continued)
d – zero force in fuse
e – fuse yield (-)
f – frame contact
f-g – frame relaxation
g – strain energy left in frame and fuse, small residual displacement
PT – Fuse Strength
Rectangular link: b/t and L/t
Loading and Boundary Condition Box (LBCB)
Loading Beam Applies Loads to the Two Frames
Load Cell Pins Provide Load Data and Feedback for Control
Anchorage Plate for the Post-Tensioning
Bumpers Restrain Horizontal Movement (Not Shown Here)
Six ¼” fuses buckled late in the loading history; Peak drift: 3%; Peak shear strain: 11%