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A platform for research: civil engineering, architecture and urbanism
Fatigue Life Estimation of Welded Plate Girder of Railway Bridge
Abstract Fatigue failure of steel member connections is a well-known failure mechanism for railway steel bridges, which sustain heavy cyclic loads. Their structural members and connections are prone to damage caused by repeated loading of trains, moving at varying speeds. Fatigue damage due to cyclic loads leads to crack formation in members and failure of joints. The designs in Indian Railway Standard (IRS) Bridge Rules are according to the Working Stress Method (WSM). In the present study, fatigue analysis of standard RDSO Heavy Mineral Loading steel plate girder of 24.4 m span is carried out using (i) provisions of IS 800 (2007): Limit State Method, and (ii) software ANSYS. The fatigue life has been estimated for the three cases. For the case study, data of an experimentally tested I-girder available in the literature (Gang et al, ASCE J Compos Construct 16(2), 2000) [1] is considered. The maximum equivalent stresses, deformations, and fatigue life in terms of the number of cycles, are evaluated. In LSM the governing factor for capacity estimation is elastic Lateral Torsional Buckling Moment. Correction for stress range given in IS 800 (2007) estimates lower fatigue life compared to working stress method (IRS bridge rules); as the effect of lateral torsional buckling is not considered in IRS bridge rules. Fatigue life estimated in terms of the number of cycles, using ANSYS is less than that obtained from the provisions of IS 800. It is concluded that the governing criteria for designing long span plate girder bridges are the lateral torsional buckling moment.
Fatigue Life Estimation of Welded Plate Girder of Railway Bridge
Abstract Fatigue failure of steel member connections is a well-known failure mechanism for railway steel bridges, which sustain heavy cyclic loads. Their structural members and connections are prone to damage caused by repeated loading of trains, moving at varying speeds. Fatigue damage due to cyclic loads leads to crack formation in members and failure of joints. The designs in Indian Railway Standard (IRS) Bridge Rules are according to the Working Stress Method (WSM). In the present study, fatigue analysis of standard RDSO Heavy Mineral Loading steel plate girder of 24.4 m span is carried out using (i) provisions of IS 800 (2007): Limit State Method, and (ii) software ANSYS. The fatigue life has been estimated for the three cases. For the case study, data of an experimentally tested I-girder available in the literature (Gang et al, ASCE J Compos Construct 16(2), 2000) [1] is considered. The maximum equivalent stresses, deformations, and fatigue life in terms of the number of cycles, are evaluated. In LSM the governing factor for capacity estimation is elastic Lateral Torsional Buckling Moment. Correction for stress range given in IS 800 (2007) estimates lower fatigue life compared to working stress method (IRS bridge rules); as the effect of lateral torsional buckling is not considered in IRS bridge rules. Fatigue life estimated in terms of the number of cycles, using ANSYS is less than that obtained from the provisions of IS 800. It is concluded that the governing criteria for designing long span plate girder bridges are the lateral torsional buckling moment.
Fatigue Life Estimation of Welded Plate Girder of Railway Bridge
Madhekar, Suhasini N. (author) / Shewale, Dinesh (author)
2019-07-31
11 pages
Article/Chapter (Book)
Electronic Resource
English
Fatigue Life Estimation of Welded Plate Girder of Railway Bridge
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