PSI - Issue 59

B. Ganendra et al. / Procedia Structural Integrity 59 (2024) 238–245 Ganendra et al. / Structural Integrity Procedia 00 (2019) 000 – 000

241

4

Fig. 1. Simply-supported beam test setup (Wu et al., 2017).

Fig. 2. Simply-supported beam test setup (Timmers and Neulichedl, 2019).

3. Finite Element Setup This paper is aimed to numerically analyse the flexural behaviour of steel cylindrical structure based on the experiment conducted in the previous study. In current work, ABAQUS software (ABAQUS, 2011) is utilized to do the numerical simulation with all simulation setup was composed to precisely replicate the experiment (shown in Figure 1) in order to obtain accurate data. In this paper, only the simply-supported beam test was conducted on four models with each model varied in geometry as can be seen in Table 1.

Table 1. Initial geometry of the models. Model Name

Diameter ( D )

Length ( L )

D / t

DT75

150 200 250 300

3000 3000 3600 3600

75

DT100 DT125 DT150

100 125 150

Initial geometric imperfection is also a parameter considered in this study as cylindrical shells are highly sensitive to the presence of geometric imperfection which it will significantly reduce the load carrying capacity of the cylindrical shells (Yadav and Gerasimidis, 2019). Imperfection is the function of the shell thickness ( t ) and initial geometric imperfection ( ) with imperfection magnitude ( ) (shown in Table 2) calculated by the given formula: (9)

Table 2. Geometric imperfection of the models.

Initial Geometric Imperfection ( ) Thickness ( t ) mm

Imperfection Magnitude ( )

Model Name

DT75

0.17 0.34 0.20 0.13

2.00 2.00 2.00 2.00

0.085

DT100 DT125 DT150

0.17 0.10

0.065

The actual loading condition of the simply supported beam test is described Figure 1, there are four points of interaction between the support points, loading points, and the cylindrical shell. In order to replicate the actual loading condition, the interaction points were used as the boundary condition (BC) in the numerical simulation.