ADK. Carry out preliminary studies
on a simple model. Kunnath will deliver preliminary Model II. Not done. Expect ~
Kunnath. Deliver Models I and II. Done. Model I was one column in a bent. Used to validate material model. Might be of interest to Eberhard. Checks that it works in terms of convergence. Model II was delivered to ADK. Model II is one bent. Core model. Includes foundation springs (can turn on & off).
Eberhard. Provide expressions from regression analyses
for use in I-880 columns related to drift and peak strain at onset of spalling
and bar-buckling. Done. Eberhard handed small document to Sashi at
Der Kiureghian, Kunnath. Identify critical uncertainties. Use sensitivity studies being conducted at UC Davis to identify those variables that are most sensitive to demand. Select material, modeling and other critical variables. Not done, expect ~15 Apr.
Stojadinovic. Compile list of DVs related to loss modeling. Done?
Fenves, Scott. OpenSees module
to compute tangential drift at inflection point. Not done yet.
Procedure is written but not yet implemented. Expect ~March 28 (per Scott email
Kunnath. Coordinate with
the issue of after-shocks with
Kunnath. Develop expressions for drift and peak strain at initiation of shear cracking and significant loss of strength
Kunnath. Deliver Model III. Done. Model III is one complete frame (frame 4 in I-880 model), 3 spans, 4 bents with one elastic beam. Ends are either rollers or springs, with properties for the spings.
expressions for drift and peak strain at initiation of shear cracking and
significant loss of strength. Not done as of
Kunnath. Validate models to check computation of system EDPs.
Kunnath. Continue calibration and validation tests of Model IV. Done. Models 3 frames, including frame-frame interaction (frames 3, 4, and 5). Sashi is using this one, but ADK doesn’t want anything more than Model II.
Fenves, Scott. OpenSees module to compute tangential drift at inflection point. Rescheduled from
Kunnath. Prepare draft report of simulation models and sensitivity studies.
Eberhard. Complete written report (Chapter 6).