1 / 24

Distributed Online Hybrid Test to Trace the Collapse of a Four-Story Steel Moment Frame

Distributed Online Hybrid Test to Trace the Collapse of a Four-Story Steel Moment Frame. Tao Wang, IEM, China Andres Jacobsen, Kyoto University, Japan Maria Cortes-Delgado, University at Buffalo, USA Gilberto Mosqueda, University at Buffalo, USA. Outline.

cain
Download Presentation

Distributed Online Hybrid Test to Trace the Collapse of a Four-Story Steel Moment Frame

An Image/Link below is provided (as is) to download presentation 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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Distributed Online Hybrid Test to Trace the Collapse of a Four-Story Steel Moment Frame Tao Wang, IEM, China Andres Jacobsen, Kyoto University, Japan Maria Cortes-Delgado, University at Buffalo, USA Gilberto Mosqueda, University at Buffalo, USA

  2. Outline • Distributed hybrid test framework (P2P) 2. Flexible test scheme and implementation 3. Specimen design and measure scheme 4. Test results

  3. Substructure A Substructure C Displ. Displ. Force Force Force Force Displ. Displ. Substructure B Substructure D Concept of Hybrid Test System = Partner Partner = = Coordinator = Partner Partner

  4. Analysis Substru. Test Substru. Coordinator R System Implementation … … R2 R2 R2 … d1 d2 dn d1 d2 dn d1 d2 dn d1 d2 dn R1 R1 R1

  5. Two Challenges for System Realization (1) How to determine the boundary displacement? • Satisfy equilibrium and compatibility at boundary • Only use standard I/O, i.e., boundary force & displacement (2) How to avoid iteration for physical loading? • One physical loading in one time step • Compatibility with trial and error procedure

  6. Quasi-Newton Procedure Procedures of Quasi-Newton Method: 1. Equilibrium equation: 2. BFGS iteration:

  7. Analysis Substru. Test Substru. Coordinator f f Force d d d d B B Fn+1 Fn+1 Predicting A R1 R1 R2 R2 d d Fn Displ. dn Loading dn+1 dn+1 dn+1 Force Correcting A C Fn Displ. dn+1 dn Predicting-Correcting Scheme Wait…

  8. Target Structure 4 x 3,500 5,000 5,000 Target Structure Planar Model

  9. 4 6 2 1 1 1 7 5 3 Substructures Mass 2 4 6 4 x 3,500 1 3 5 7 5,000 5,000 Original Model Target Substructures

  10. Substructures with Overlapping Domain Mass Mid-node 3 5 7 4 x 3,500 2 4 6 1 Overlapping Domain 3 5 7 2 4 6 1 5,000 5,000 Original Model Overlapped Substructures

  11. Flexible Implementation at Boundaries Lumped mass 3,500 3,500 3,500 Numerical substructure Extended members Extended members 1,750 1,750 First story columns First story column 3,500 Link 3,500 Link 2,500 5,000 2,500 Tested substructure at UB Tested substructure at KU Final Substructures

  12. Numerical Demonstration First Story Roof Level

  13. Overseas Collaboration University at Buffalo Kyoto University

  14. System Configuration Proxy PC Internet Internet Internet Internet Local LAN Local LAN ControlPC1 xPC Matlab StationUB RS232C SCRAMnet RS232C ControlPC2 StationKU RS232C Coordinator Sub1 ControlPC3 Kyoto Buffalo 10/15/2014

  15. Specimen Setup 2014/10/15

  16. Specimen Instrumentation (Kyoto) 20 21 10 9 500 800 510 11 12 13 14 15 400 26 27 600 400 22 23 8 6 5(7) Strain gauges Digital displacement transducers 304 744 24 25 4 2 1(3) 640 400 19 18 17 16 10/15/2014

  17. Specimen Instrumentation (Buffalo) CE3 CW3 400 400 900 900 900 B1 B2 B3 400 400 CE2 CW2 Strain gauges CE1 CW1 400 400 10/15/2014

  18. Specimen Instrumentation (Buffalo) 990.6 990.6 990.6 PB1T PB2T PB3T 190.5 PB1B PB2B PB3B 549.3 549.3 Potentiometers PCW2 PCE2 50.8 50.8 PCE1 PCW1 549.3 549.3 10/15/2014

  19. Structure Responses • The story deformation remains uniform before collapse. The story drifts before collapse is close to 0.02. • It finally collapsed in the story mechanism, the first story drift is close to 0.12 rad. 2014/10/15

  20. Buffalo Specimen

  21. Kyoto Specimen

  22. Comparison with Shaking Table Test 20% 40% 60% 100% 2014/10/15

  23. Comparison with Shaking Table Test

  24. Summaries • The hybrid test framework encapsulates each substructure by a standard I/O interface. Only boundary displacements and forces are exchanged between substructures and the coordinator program. The hybrid test framework is able to implement multiple tested substructures, and it is demonstrated to be stable even though the tested substructures have significant unstable behavior. The hybrid test framework has a capability to reproduce the dynamic behavior of a structure in a collapse stage.

More Related