PSI - Issue 17

Juan Cruz Castro et al. / Procedia Structural Integrity 17 (2019) 115–122 Juan Cruz Castro et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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the bridge girders were obtained. They were located near the contact between the trolley and the rail of bridge girder. Several theories for the correction of the mean stress were used and compared with the results of ANSYS code.

5.1. Equivalent completely reversed stress amplitude for bridge girders

Table 5 shows the Equivalent completely reversed stress amplitude, σ ar . They were obtained with the equations of Goodman, Gerber, Morrow and Walker and with ANSYS code.

Table 5. Equivalent completely reversed stress amplitude for the bridge girders. Heavy Load Description σ ar Analytical [MPa]

σ ar Numerical [MPa] Goodman Gerber

Morrow

Walker

Goodman Gerber

Plant Construction Cycles

86.57

89.83

102.72 145.01

78.81

102.72 145.01

78.81

Load Test

117.63

115.99

107.26

107.26

Reactor Vessel Head

84.17 55.29 73.55 63.19 73.55 38.05 41.01 99.97

87.73 61.40 78.28 68.80 78.28 44.62 47.57

99.59 63.22 85.93 72.92 85.93 42.65 46.13

76.64 50.55 67.03 57.67 67.03 34.96 37.64 91.02

99.58 63.22 85.93 72.92 85.93 42.65 46.13

76.64 50.55 67.03 57.67 67.03 34.96 37.64 91.02

Drywell Head

Reactor Vessel Steam Separator

Shield Plug

Dryer/Separator Canal Plugs

Work Platform Miscellaneous

Waste Cask Load Cycles

101.36

120.57

120.57

The Equivalent completely reversed stress amplitude for each case was calculated by means of the fatigue tool of ANSYS code. The results of the two most critical cases are shown in Fig. 2. The first one is the test of the crane at the end of an outage. The maximum capacity is exceeded by 25%. The second case is when the waste casks are handled.

a

b

c

d

Fig. 2. Equivalent completely reversed stress amplitude calculated with ANSYS code (a) Load test with Goodman (b) Load test with Gerber (c) Handling of waste cask with Goodman (d) Handling of waste cask with Gerber.