PSI - Issue 70

Anil Pradeep Konda et al. / Procedia Structural Integrity 70 (2025) 153–160

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A 12.45 m length of the ISMB 600 section yields a 12 m long castellated girder when cut according to the dimensions shown in Figure 2. Accordingly, a 12 m span of the castellated girder is adopted for the damage assessment presented in the following sections. In the present study, only damage as a 5mm cut to the bottom flange and complete weld failure are considered for investigation. A single case study of the steel plate girder will be presented as a

Fig. 3: Castellated girder section showing element types

reference for the damage assessment on castellated girders. 5. Single Damage Case

To establish a reference for comparison, the authors began with a damage assessment of a solid girder with the same depth as the castellated section. A 100 kN mid-span load is applied, with the same mesh as in earlier FE models. 5.1. Steel Plate Girder The damage detection method relies on baseline (healthy) deflections to assess severity. A 5 mm cut was introduced in the bottom flange at 7.8 m along the 12 m solid beam, representing damage with an unknown extent of flexural stiffness reduction. The Steel Plate Girder (SPG) has the cross-sectional dimensions specified in Section 3. The damage assessment of the SPG in a single damage scenario is presented in Figure 4.

Fig. 4: Damage Assessment of SPG (a) Bottom Flange Cut, (b) Deflections and (c) Element Damage Severity