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You are here: Home / Projects / MISST

Multi-Site Soil-Structure-Foundation Interaction Test (MISST)


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Project Overview

The MISST concept was developed to provide a realistic test bed application with which to verify and extend all components of hybrid distributed simulation as well as all components of the sites taking part in the experiment. Concurrently, it has extended and represents the current state-of-the-art in distributed and integrated experimental-analytical earthquake structural and geotechnical engineering simulations.

The MISST structure is based on the Collector-Distributor 36 of the I-10 Santa Monica Freeway which was damaged during the 17 January 1994 Northridge Earthquake. The idealized structure and sub-structuring scheme are illustrated in Figures 1 and 2 respectively. The distributed simulation will be orchestrated by UI-SIMCOR, UIUC’s simulation coordinator software. UI-SIMCOR handles all inter-module communication and hosts the numerical integration scheme. As shown in the figure below, large-scale pier specimens at the UIUC and Lehigh sites are combined with advanced soil models at RPI.

Photos: Construction

Construction 01
Construction 02
Construction 03
Construction 04
Construction 05
Construction 06
Construction 07
Construction 08
Construction 09
Construction 10
Construction 11
Construction 12
Construction 13
Construction 14
Construction 15A
Construction 15B
Construction 15D
Construction 15F
Construction 15G
Construction 15I
Construction 15J
Construction 15K
Construction 15N
Construction 15P
Construction 18
misst-Construction 19
Construction 21
Construction 22
Construction 25
Construction 28
Partially Damaged Pier Closeup 1
Partially Damaged Pier Closeup 2
Partially Damaged Pier Closeup 4
Partially Damaged Pier
[Show picture list]

Link to Videos

Results

  • Input Motion: Northridge EQ, Station – Newhall Fire, PGA = 0.583g
  • 1210 steps imposed
  • Lehigh Pier: Total loss of load-carrying capacity
  • UIUC Pier: Two stage failure

Conclusion

  • The coordination of three sites, Lehigh, UIUC and RPI, for a five-component hybrid (testing-analysis), geographically distributed NEES simulation worked seamlessly.
  • The redistribution of forces between the two sites with bridge piers as either of the two suffered partial failure shows that a full interaction was taking place between the distant sites at each time step.
  • The failure modes obtained are similar to those observed in the Northridge earthquake, thus opening the door to formulating design and retrofitting approaches to avoid such failures in the future.

Sponsors

  • National Science Foundation (NSF)

NEES Facilities

  • Lehigh University
  • University of Illinois at Urbana-Champaign (UIUC)
  • Rensselaer Polytechnic Institute (RPI)

Participants

Investigators

  • James Ricles – Lehigh University
  • Bill Spencer – UIUC
  • Amr Elnashai – UIUC
  • Daniel Kuchma – UIUC
  • Tarek Abdoun – RPI

NEES Project Data Archive

  • https://nees.org/warehouse/project/120 
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[site map] Copyright © 2017 · All Rights Reserved · Lehigh University · The Lehigh NHERI Experimental Facility is supported by a grant from the National Science Foundation (#1520765). Disclaimer: Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF.