PSI - Issue 52

Govardhan Polepally et al. / Procedia Structural Integrity 52 (2024) 487–505 Govardhan Polepally/ Structural Integrity Procedia 00 (2019) 000 – 000

502 16

Mode 16 Mode 17 Mode 18 Mode 19 Mode 20

55.205 56.372 57.225 61.397 61.997

48.324 48.357 50.762 50.874

77.793 78.322 81.057 85.835 86.572

74.552 77.731 78.488 79.849 81.379

73.267 73.731 76.221 78.699 80.733

51.11

Figure-12 (b) shows the Stress, strains, and displacement obtained from the numerical model, and considers all the results extracted are within permissible limits and values have been mentioned in table-5 for the on-site test and expected future load. Table - 11 shows the results of the static analysis conducted using FEM software for five different bridges. The analysis was conducted for three different load conditions 18, 21, and 25 Metric tons. The results indicate that all five bridges exhibited deformation under the applied load, with the maximum deformation ranging from 0.00251 to 0.00349 meters. The variations in the deformation of five different bridges for three different loads are as follows for Bridge-1, the total deformation increases from 0.00263 m to 0.00294 m and then to 0.00349 m as the load increases from 18 MT to 21 MT and to 25 MT, respectively. Bridge-2 also shows a similar pattern, where the total deformation increases from 0.00265 m to 0.00291 m and then to 0.00345 m as the load increases from 18 MT to 21 MT and 25 MT, respectively. In Bridge-3, the total deformation first increases from 0.00283 m to 0.00282 m for 18 MT and 21 MT loads, respectively, and then increases to 0.00335 m for the 25 MT load. Bridge-4 shows an increase in total deformation from 0.00251 m to 0.00279 m and then to 0.00332 m for 18 MT, 21 MT, and 25 MT loads, respectively. For Bridge-5, the total deformation increases from 0.00258 m to 0.00288 m and then to 0.00341 m as the load increases from 18 MT to 21 MT and 25 MT, respectively. Overall, the table shows that as the load on the bridges increases, the total deformation also increases, indicating that the bridges experience more strain. The maximum principal stress ranged from 6.79 to 12.4 MPa, normal stress ranged from 6.79 to 12.4 MPa, and shear stress ranged from 2.45 to 6.29 MPa.

Table 11. Static analysis results

Load Intensity (MT)

Total deformation (m)

Max principal stress (MPa)

Normal stress (MPa)

Shear stress (MPa)

Description

18 21 25 18 21 25 18 21 25 18 21 25 18 21 25

0.00263 0.00294 0.00349 0.00265 0.00291 0.00345 0.00283 0.00282 0.00335 0.00251 0.00279 0.00332 0.00258 0.00288 0.00341

9.36 10.4 12.4 7.91 8.82 10.5 7.05 7.86 9.33 6.79 7.57 8.98 7.98 8.89 10.6

9.34 10.4 12.4 7.87 8.77 10.4 7.05 7.85 9.32 6.79 7.56 8.98 7.98 8.89 10.6

3.67 4.09 4.85 3.14 3.50 4.16 3.83 7.27 5.06 4.76 5.30 6.29 2.45 2.73 3.24

Bridge-1

Bridge-2

Bridge-3

Bridge-4

Bridge-5