ASSESSMENT OF RESIDUAL LIFE OF GIRDERS OF BRIDGE No

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scale ( fig.-5) and residual life for the actual operational traffic density of the section, where these girders are likely to be used, can be obtained with the use of this graph. Although, it is observed from the report prepared by the Railway (Annexure-I) that many girders are having corrosion particularly in top flange plates, but this factor is not considered in this study. Hence, it is advised that the corroded parts of the girders should be replaced before their reuse. 7.0 Conclusions: The girders of both the abandoned bridges can be used for traffic density of 27GMT for a period of about 60 years. With replacement of corroded parts, the remaining life span of the girders can be extended further, if traffic density is less than 27 GMT and good maintenance practices are being followed. -------- 14
15 Table –1 RU Loading : Annual traffic tonnage for standard traffic types S <strong>No</strong> . Traffic Type Train Type Train Weight (t) <strong>No</strong>. of Trains per annum Total Tonnage GMT 1 Heavy Heavy Freight 1120 4821 5.40 Heavy Freight 1120 7232 8.10 Mixed Freight 852 15845 13.50 Total 27.00 2 Medium Diesel Hauled Pass. Train 600 22500 13.50 Heavy Freight 1120 2411 2.70 Heavy Freight 1120 6027 6.75 Steel Train 1794 2257 4.05 Total 27.00 3 Light Steel Train 1794 752 1.35 Electric Multiple Unit 372 14516 5.40 Suburban trains 344 23546 8.10 Suburban Trains 172 47093 8.10 Diesel Hauled Pass. Train 600 4500 2.70 Electric Hauled Pass. Train 572 2360 1.35 Total 27.00 Table –2 Details of fatigue testing of specimen taken out from girders of existing abandoned bridge no 73
Page 1 and 2: Ministry of Railways Government of
Page 3 and 4: INDEX S.No Contents Page no. 1. Int
Page 5 and 6: 11x 48.5 m spans in bridge No. 75 w
Page 7 and 8: d) The fatigue life of standard spa
Page 9 and 10: slowly before failure, which shows
Page 11 and 12: k1 = ------------------------------
Page 13: Life = 120 / k1 m = 594 years Remai
Page 17 and 18: Year GMT during the GMT Cum. GMT du
Page 19 and 20: Stress range in N per sq mm 1000 10
Page 21 and 22: No. of cycles 70 60 50 40 30 20 10
Page 23 and 24: 1. The Vasai Creek is spanned by br
Page 25 and 26: vii) The girders are having sliding
Page 27 and 28: WEIGHT CALCULATION Calculation shee
Page 29: REFERENCES: 29 Annexure - III 1. Es

ASSESSMENT OF RESIDUAL LIFE OF GIRDERS OF BRIDGE No

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