Truss Retrofit to Mitigate Substructure Displacements at I-20 Mississippi River Bridge at Vicksburg

Transcription

1 Truss Retrofit to Mitigate Substructure Displacements at I-20 Mississippi River Bridge at Vicksburg Zolan Prucz, Ph.D., P.E., Modjeski and Masters, Inc. New Orleans, LA 2013 Louisiana Transportation Engineering Conference Baton Rouge, Louisiana

2 Acknowledgements: Burns Cooley Dennis, Inc. Dr. James H. May and Dr. Richard J. Lutten Lazenby and Associates, Inc. Boh Brothers, LLP C.E.C., Inc. LADOT Headquarters and District FHWA Ardaman & Associates, Inc. and their Team of Experts

3 US 80 W-1 PP15 I-20 PP15 E-1 E-2 E-3

4 Pier-1 E-3 Pier-2 E-2 E-1

5 Pier-2 Pier-1

6 Pier E-2

7

8 Bridge Characteristics West East F E F E F F E F E PP15 PP15 Simple Span Anchor Span Suspended Span Anchor Span Simple Span W-3 W-2 W-1 Cantilever E-1 E-2 E-3 Spans

9 Original Bearings E-1 E-2 E-3

10 PP15 PP15

11 Truss Elevation View at PP15 U14 CANTILEVER SPAN SUSPENDED SPAN U15 U16 FALSE CHORD U15-U16 WEST SUSPENDED SPAN HANGER EAST L14 FALSE CHORD L14-L15 L15 TRUSS ELEVATION VIEW AT PP15 L16

12 Top Lateral System at PP15 CANTILEVER SPAN SUSPENDED SPAN FALSE CHORD U15-U16 WEST EAST FALSE CHORD U15-U16 U14 U15 TOP LATERAL SYSTEM AT PP15 U16

13 Bottom Lateral System at PP15 and PP15 CANTILEVER SPAN PP15 SUSPENDED SPAN SUSPENDED SPAN PP15 CANTILEVER SPAN EAST WEST LONGITUDINAL STRUT FALSE CHORD L14-L15 FALSE CHORD L14 -L15 L14 L15 L16 L16 L15 L14 BOTTOM LATERAL SYSTEM AT PP15 BOTTOM LATERAL SYSTEM AT PP15

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15 PP 14 Stringer PP 15 Jointmeter Long Strut

16 Bridge Condition After 2000 / 2001 Movements U 15 PIER E-3 BEARINGS E-3 EXP DAM AT PP 15 EXP DAM AT PIER E-3

17 Channel Migrations

18 -46 E F E E E F CR BR ER DR 7 18 PIER 3 PIER 2 PIER 1 TOWER 1 U.S. Route 80 Bridge AR 158 F E F E E E-1 E-2-70 I-20 Mississippi River Bridge

19 Bridge Instrumentation Location of Tiltmeters Location of Jointmeters Location of Datalogger PP15 PP15

20 Summary of I-20 Bridge Pier Movements Estimated Time or Time Period Top of Pier E-2 Top of Pier E-1 (in) (arc-sec) (in) (arc-sec) and 2000 Prior to 5/ Feb 2/5/2003 to 2/6/ Aug 8/2/ Nov 11/17/ Aug - Sep Sep - Dec Sep - Dec Nov Oct June - Dec 8/13/2006 to 9/21/2006 9/21/2009 to 12/19/2007 0/28/2009 to 12/22/ /7/2010 to 11/22/ /20/2011 to 10/24/2011 6/29/2012 to 12/21/ Total Movement (+/-)

21 E-3: Jointmeter Readings Starting 8/27/2004; Updated 2/02/ Joint Opening at E-3 Joint Closing at PP15 Pier Tilt (arc-sec) Pier Tilt (arc-sec) /27/ /7/2004 3/21/2005 8/27/ /7/2004 3/21/2005 7/6/ /29/2005 2/26/2006 6/24/ /6/2006 1/14/2007 4/24/2007 8/2/ /10/2007 2/18/2008 5/28/2008 9/5/ /14/2008 PP-15: Jointmeter Readings Starting 8/27/2004; Updated 2/02/2013 7/6/ /29/2005 2/26/2006 6/24/ /6/2006 1/14/2007 4/24/2007 8/2/ /10/2007 2/18/2008 5/28/2008 9/5/ /14/2008 3/24/2009 7/2/ /10/2009 1/18/2010 4/28/2010 8/6/ /14/2010 2/22/2011 6/2/2011 9/10/ /19/2011 3/28/2012 7/6/ /14/2012 1/22/2013 3/24/2009 7/2/ /10/2009 1/18/2010 4/28/2010 8/6/ /14/2010 2/22/2011 6/2/2011 9/10/ /19/2011 3/28/2012 7/6/ /14/2012 1/22/ River Stage (feet) River Stage (feet)

22 February 5-6, 2003 Movement of Piers E-1 and E-2 Pier E-3: Jointmeter Readings vs. River Stage Started 1/4/2003; Updated 3/10/2003 Difference Between Measured and Calculated Expansion Readings for ' Span River Stage Jointmeter Reading (in) /7 18: Gage height (ft) :00 1/4/2003 0:00 1/14/2003 0:00 1/22/2003 0:00 1/31/ :00 2/8/2003 2/4 0: 18:00 2/16/ :00 2/24/ :00 3/4/

23 June 22, 2003 Longitudinal Strut Damage PP 15

24 2004 Bridge Modifications (Remedial) Contractor: Boh Bros., Constr. Company, LLC Bridge Modifications (Proactive) Contractor: C.E.C. Inc., David Huval Jr. E F E F E F E F F E F E PP15 PP W-5 W-4 W-3 W-2 W-1 E-1 E-2 E-3

25 2004 Bridge Modifications Measure 1 Measure 2 Measure 3 PP15 PP14 PP14 PP15

26 Summary of 2004 Bridge Modification Measures Measure Objective Retrofit Prevent roadway traffic hazard at expansion dam at Pier E-3. Prevent Span E-2 E-3 drop at Pier E-3. Eliminate locked-in stresses between Piers E-1 and W-1. Replace expansion dam at Pier E-3. Widen top of pier area. Add catch blocks under the trusses. Shorten span between Piers E-1 and W-1. Repair longitudinal strut L15 - L14.

27 Expansion Dam Modifications at Pier E-3 E-3 E-3 EXPANSION DAM MODIFICATION EXISING CONDITION

28 Expansion Dam at Pier E-3 After Modifications

29 Pier E-3 Modifications E-3 EXISING CONDITION AFTER MODIFICATIONS MODIFICATION OF PIER E-3

30 Shortening of Span Between Piers E-1 and W-1 PP14 PP15 Opening of Expansion Dam at PP15 by Jacking Span PP15-PP14 Towards PP14

31 PP 15 Shortening of Span L14 L15 PP 14 CUT OUT PP 14 SHIFT AFTER CUT EXISTING CONDITION SHORTENING OF STRINGERS BETWEEN L14 AND L15

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33 PP 14 AFTER SPAN SHORTENING EXPANSION DAM AT PP 15 AFTER SPAN SHORTENING

34 Truss False Chord Modifications at U15 U16

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36 Longitudinal Strut Shortening at Span L14 L15 PP14 PLAN - PANEL POINT 14 MODIFICATION OF LONGITUDINAL STRUT

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38 Longitudinal Strut Repair at Span L14 L15

39 Deck Joints After 2004 Repairs PP 15 E-3 PP 15

40 2010 Bridge Modifications for Increased Movement Capacity Measure 1 Measure 2 Measure 3 Measure 4 Measure 5 PP15 PP14 PP14 PP15

41 Summary of 2010 Bridge Modification Measures Measure Objective Retrofit 1 Increase movement capacity of expansion dam at Pier E-3. Replace expansion dam at Pier E Increase movement capacity at bearings at Piers E-3 and E-2. Increase movement capacity within the deck, between Pier E-1 and W-1. Prevent span drop at Pier E-2 and E-1. Provide redundancy to the suspended span hangers. Replace bearings at E-3 and E-2 with inverted sliding disc bearings. Shorten span PP14-15 and replace expansion dams at Pier E-2 and PP15. Widen top of pier area at E-2 and E-1. Add bearing blocks at E-2 and E-1. Add eyebars at each suspended span hanger.

42 Expansion Dam Replacement at Pier E-2

43 Bearing Replacement at Pier E-3

44 Bearing Replacement at Pier E-2

45 E-2 E-3

46 PP 14 Shortening of Span L14 L15 PP14 CUT OUT SHIFT AFTER CUT SHORTENING OF STRINGERS BETWEEN L14 AND L15

47 PP14

48 PP14

49 PP15

50 PP15

51 Expansion Dam Replacement at PP15

52 PP 14 AFTER SPAN SHORTENING EXPANSION DAM AT PP 15 AFTER SPAN SHORTENING

53 False Chord Adjustments at U15 False Chord Modifications at U15

54 Widening of Pier Top Area at Pier E-1

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56 Addition of Eyebars to the Suspended Span Hangers at PP15 and PP15

57

58 Deck Joints After 2010 Modifications PP 15 E-3 E-2

59 Summary Remedial Structural Modifications Proactive Structural Modifications for: Anticipated movements Extreme scenarios

60 Thank you!