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INTRODUCTORY INFORMATION [1.6]Lichtenstein, Abba G. “Historic Bridges: Conflict Ahead.” Civil Engineering 7,no. 5 (May 1987): 64-6 (620.5 C499) (C).This article briefs a few preservation conflicts/solutions the author hasbeen involved with. A 75 year old steel truss in Hawaii, after much input fromthe public, was converted to a one-way bridge, two-way traffic pattern. A 90 yearold lenticular truss in Somerset County New Jersey was rehabbed by replacingsome deteriorated members and adding high strength beams inside existing builtup members. A bridge in Califon, New Jersey was widened by cutting it in halfand new floorbeams were added. A bridge in West Virginia was dismantled andmoved to a golf course. The worst case was a chain link suspension bridge inNew York which was judged structurally deficient and was removed for fear ofsudden collapse due to flooding. Detailed drawings and certain details weresaved for future reference. A list of “rules of thumb” of bridge preservation aregiven.INTRODUCTORY INFORMATION [1.7]Lichtenstein, Abba. “Impact Fracture in Historic Bridges.” In Structures CongressXIII: Proceedings of papers presented at the Structures Congress '94,Atlanta, Georgia, April 24-28, 1994, sponsored by the Structural Divisionof the American Society of Civil Engineers. Atlanta, Georgia, 1994, 1289-1292 (TA630 S86 1995) (C).This article outlines failures that have occurred to historic truss bridgesand the outcome of each situation. The first bridge discussed was a suspensiontruss bridge that collapsed after a car impact. Pieces of the bridge were salvaged4
from the river and an investigation into reconstructing the bridge was undertaken.Because of monetary constraints, the bridge was not restored. The second bridge,a wrought iron Phoenix truss, suffered extensive damage to one truss but did notcollapse due to the other truss accepting the additional dead load. The bridge wasrepaired at a minimal cost compared to a new structure. The last bridge suffered apartial collapse due to an overload caused by a power generator placed on thebridge during a repair. The rehabilitation involved hiding new members insidethe old members to reduce the stresses.INTRODUCTORY INFORMATION [1.8]Report of the Secretary of Transportation to the United States Congress. TheStatus of the Nation’s Highways and Bridges: Condition and Performanceand Highway Replacement and Rehabilitation Program 1989. WashingtonD.C.: Government Printing Office, June 1989 (Y4.P96/11:101-2) (PCL).This report outlines many factors which effect the nations bridges.Chapters on Highway Finance, Conditions and Performance, and Highway andBridge Needs for the Future are presented. These chapters detail the innerworkings of how the national government views the status of the bridges on thehighway system. A second part of the report focuses on the bridge replacementand rehabilitation program. An explanation of the goals and methodology of thereplacement program is included. The report also describes the various fundingtypes available for bridge rehabilitation or replacement. This report was veryhelpful in explaining how the government is dealing with the problem of deficientbridges.5
Page 1 and 2: Preservation Alternatives for Histo
Page 3 and 4: DedicationTo my parents, Russell an
Page 5 and 6: AbstractPreservation Alternatives f
Page 7 and 8: 3.2.1 Survey Overview .............
Page 9 and 10: Question 7: .......................
Page 11 and 12: LIST OF FIGURESFigure 3.1: Response
Page 13 and 14: xiii
Page 15 and 16: esearchers have identified tasks, w
Page 17: 1.3.3 Summary of Literature Review
Page 20 and 21: 2.2 METHODOLOGYThe methodology used
Page 22 and 23: 3. Superimposed Truss4. Coverplatin
Page 24 and 25: the University of Texas at Austin,
Page 26: in the previous section, including
Page 29 and 30: 3.2.1 Survey OverviewThe two compon
Page 31 and 32: 3.3.1 Question 1Has your state deve
Page 33 and 34: 3.3.3 Question 3Have you used advan
Page 35 and 36: 3.3.5 Question 5What are the most c
Page 37 and 38: members are understrength. By utili
Page 39 and 40: None13%ConcreteBarrier9%Other26%W-B
Page 41: contacted.From these follow-up call
Page 45: 5.2 RECOMMENDATIONS FOR FUTURE INVE
Page 48 and 49: INTRODUCTORY INFORMATION [1.2]Nicho
Page 52 and 53: Rehabilitation TechniquesGENERAL [2
Page 54 and 55: This article describes a structural
Page 56 and 57: POST-TENSIONING [2.2.3]Ayyub, Bilal
Page 58 and 59: A572-50 steel were added to the old
Page 60 and 61: To increase the portal rigidity of
Page 62 and 63: sponsored by the Structural Divisio
Page 64 and 65: Tension rods were attached to the t
Page 66 and 67: is a conservative designation for r
Page 68 and 69: A truss bridge built in 1926-27 con
Page 70 and 71: hanger type connection. The pins on
Page 72 and 73: This handbook provides an overview
Page 74 and 75: This technical brief outlines the a
Page 76 and 77: crossing the Charles River was dama
Page 78 and 79: for inspection procedures in the fu
Page 80 and 81: model and 3-D model were both used.
Page 82 and 83: In this article, the authors discus
Page 84 and 85: to derive equations for partially e
Page 86 and 87: Maximum forces due to uniform lane
Page 88 and 89: This article investigate the contri
Page 90 and 91: described along with the necessary
Page 92 and 93: RELIABILITY ANALYSIS [3.6.3]Frangop
Page 94 and 95: STRUCTURE [4.1.3]Aktan, A. E., K. L
Page 96 and 97: modified from published values usin
Page 98 and 99: case, the pin ended calculation pro
Page 100 and 101:
The bridge was instrumented and a s
Page 102 and 103:
MEMBERS [4.2.2]Schindler, Hans-Jako
Page 104:
MEMBERS [4.2.4]Keating, Peter B., J
Page 107 and 108:
double splices with different stres
Page 109 and 110:
References : Virginia Highway and T
Page 111 and 112:
ehabilitation project. The Steel St
Page 113 and 114:
Board, National Cooperative Highway
Page 116 and 117:
APPENDIX ASURVEY OF DEPARTMENTS OF
Page 118 and 119:
Preservation of Historic Metal Trus
Page 121 and 122:
4. Have you used load testing to as
Page 124 and 125:
8. What methods, if any, have you u
Page 126:
12. Additional Comments:13. Please
Page 129 and 130:
MD : We haven’t developed any off
Page 131 and 132:
Yes:MD: We used load testing to eva
Page 133 and 134:
TN: Replace members. Add section to
Page 135 and 136:
Widening bridge: AZ, [NE (tested in
Page 137 and 138:
SK: We do not have any historic met
Page 139 and 140:
• We replaced the deck of bridge
Page 141 and 142:
• Reuse the floorbeams by bolting
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