Evaluation and Repair of Wrought Iron and - Purdue e-Pubs ...

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190CountyIf your organizationdoes maintain wroughtiron bridges, then areformal maintenanceand repair proceduresavailable?Is heatstraighteningof wroughtiron bridgespermitted?Is weldingof wroughtironbridgespermitted?Are thereproceduresavailable forriveting orboltingwrought iron?County 1 No No No NoCounty 2 No No No NoCounty 3 No No No NoCounty 4 No No No NoCounty 5 No No No NoCounty 6 No No No NoCounty 7 No No Yes NoCounty 8 No Yes Yes NoCounty 9 No No No NoCounty 10 No No No NoCounty 11 No No Yes NoCounty 12 No No No NoCounty 13 No Yes Yes YesCounty 14 No Yes Yes NoCounty 15 No No No NoCounty 16 No No No NoCounty 17 No No No NoCounty 18 No No No NoCounty 19 No No Yes NoComments:What inspection procedures are most commonly used when dealing with the historicwrought iron bridges?State 1: VisualState 2: Visual acceptabilityState 3: Same inspection procedures as for other bridges.State 4: Same as for any bridge - Use of NBIS standards for determining the condition ofthe bridge.State 5: No special procedures. Generally we are unsure if the bridge is wrought iron untiltesting is completed. Not performed unless a rehab project.
191State 6: Per NBIS / DOT Standard, Visual non-destructive methods, careful look forcracks, Inspect yearly if fracture is critical.State 12: Federal NBI requirementsState 16: Generally we do not determine if early metal bridges are wrought iron or steel.State 17: Heat straightening and welding procedures are still undecided.State 24: Normal visual inspection. Pins in trusses are checked for cracks via ultrasonictesting.State 25: Visual Hands-on Inspection.State 26: If had bridges would probably use visual hands on inspection.State 28: Normal NBIS InspectionsState 29: Visual Inspection of wrought iron members and the others.State 31: Visual NBIS inspections. If cracks are suspected we use dye-penetrant and UT.State 32: Visual Inspection would be used.State 33: Routine InspectionCounty 1: Standard NBIS ProceduresCounty 2: Contract inspections per state programCounty 7: Engineering Firm Inspects BridgesCounty 8: Routine inspection on 1-2 year cycleCounty 9: The highway dept. relies on consultantsCounty 11: The bi-annual bridge inspectionCounty 12: Most cover on fracture critical inspections - 2 year freq.County 13: Refer to Book by James L. Cooper 'Restoring Historic Metal Truss Bridges'County 15: Standard NBIS procedures
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Purdue UniversityPurdue e-PubsJTRP
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1. Report No. 2. Government Accessi
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epairing a bent wrought iron tensio
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vPageCHAPTER 3TEST PROCEDURES FOR M
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ixLIST OF FIGURESFigurePageFigure 1
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xiFigurePageFigure 3.30 Top View of
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xiiiFigurePageFigure 5.12 Typical T
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xvAppendix FigurePageFigure D.7 Ini
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viiiAppendix TablePageTable A.5 Det
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iiiThe authors would also like to t
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2but also what material properties
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4microstructure of the metal. The c
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62. LITERATURE SEARCHBefore experim
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8imperfections, the performance of
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10wrought iron. Adding the slag aft
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12method for manufacturing wrought
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14patents for their process and tra
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16This method of testing of structu
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18plot of this percent elongation d
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20significant variation in the perc
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22The practice of restoring histori
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24Elleby, Wallace W. Sanders, F. Wa
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26From all the surveys that were di
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28Table 2.1 Average Ultimate Streng
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30Figure 2.3 Wrought Iron “Sponge
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32Histogram of Kirkaldy Wrought Iro
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34Percent Occurance in Range - %45.
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3660Combined Wrought Iron BarsTensi
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38The Bell Ford Bridge consisted of
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40Two. These samples were taken fro
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42specimens were of constant cross
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44Along with rectangular tensile co
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46After the initial test loading wa
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483.6 Fatigue TestingTo develop a b
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50The final specimen category consi
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52This analysis was completed using
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54After the initial test was comple
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56completed, but before the surface
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58readings, load cell readings and
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60Figure 3.3 Donated Eyebars 4 and
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62Figure 3.7 Heated Areas in Blue o
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64Figure 3.11 Detail Used in Groove
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66900080007000y = 27.153xR 2 = 0.99
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68Figure 3.19 Charpy Impact Testing
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70Figure 3.23 Eyebar Connection in
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72Figure 3.27 Eyebar A After Filler
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74Figure 3.31 Side View of Finished
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76Figure 3.35 Front View of Eyebar
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78strength from the existence of pe
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80The carbon content present in the
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82value may not be very accurate bu
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84strengths was found to be 29,940
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86wrought iron bars were investigat
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88stresses are induced. These perma
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90toughness the material. The test
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92From the finite element analysis,
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94Table 4.1 Chemical Analysis of Ey
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96Table 4.3 Tensile Coupon Test Res
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98Table 4.5 Charpy Impact Test Resu
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100Table 4.7 Comparison of Strain G
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102Figure 4.1 Typical Micrograph of
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104Figure 4.5 Fracture Surface of D
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106Comparison of Tensile Strengthfo
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108Combined Wrought Iron Bar Histor
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110Figure 4.17 Macrograph of Weld u
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112Figure 4.21 Cleavage Fracture of
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Figure 4.25 Elongation of Hole in E
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116signs on or near the bridge that
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118testing of historic wrought iron
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120so that they would act in symmet
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122The reasons for the differences
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124The second corrosion pattern mod
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126Keating (1984) stated that the s
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128charcoal fire until it is red ho
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130Figure 5.3 Picture of Bottom Cho
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132Figure 5.7 Using Force After Usi
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134Figure 5.11 Reassembling a Pin C
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1366. SUMMARY, CONCLUSIONS AND IMPL
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138rectangular in shape. These eyeb
Page 160 and 161: 140were joined together with a full
Page 162 and 163: 1424. The Charpy impact energy of t
Page 164 and 165: 144connections are unsymmetrical, i
Page 166 and 167: 146LIST OF REFERENCESAASHTO (1998).
Page 168 and 169: 148Hodgkinson, Eaton (1840). Experi
Page 170 and 171: 150Appendix A. Data Collected From
Page 172 and 173: 152Table A.1 Wrought Iron Bar Tensi
Page 174 and 175: 154Table A.1 (continued) Wrought Ir
Page 176 and 177: 156Table A.2 (continued) Wrought Ir
Page 178 and 179: 158Table A.3 Wrought Iron Angle Ten
Page 180 and 181: 160Table A.4 (continued) Summary of
Page 182 and 183: 162Table A.4 (continued) Summary of
Page 184 and 185: 164Table A.5 (continued) Detailed I
Page 204 and 205: 184Table A.7 Tensile Strength Data
Page 206 and 207: 186Table B.1 Example Historic Wroug
Page 208 and 209: 188DepartmentofTransportationIf you
Page 212 and 213: 192County 16: County bridge inspect
Page 214 and 215: 194State 13: Included in original d
Page 216 and 217: 196Figure C.1 Diagrams Showing Loca
Page 218 and 219: 198Figure C.3 Heating of Eyebar fro
Page 220 and 221: 200Figure C.7 Double V Butt Joint u
Page 222 and 223: 202Figure C. 11 Welded Tensile Coup
Page 224 and 225: 204Figure C.15 Tensile Coupon from
Page 226 and 227: 206Figure C.19 Cooling Bath with Su
Page 228 and 229: 208Figure C.23 Side View of Eyebar
Page 230 and 231: 210Figure C.27 Eyebar End Connectio
Page 232 and 233: 212Appendix D. Welding Procedure fo
Page 234 and 235: 214D.2 Filler Weld for Eyebar Conne
Page 236 and 237: 216Figure D.1 Weld Joint Detail Use
Page 238 and 239: Figure D.5 Completed Weld Before Su
Page 240 and 241: 220Figure D.7 Initial Pass Pattern
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