For each load combination, Allowable Stresses are defined by applying factors to tensile and compressive strengths (Figure 169). The user can change these values. These values are not used in the software. Allowable stresses are presented in the output to facilitate the interpretation of safety factors or calculated stresses.


Figure 169



Figure 170


Figure 171


Default values in CADAM3D


Safety factors, stability criteria and allowable stresses

Performance indicators

Load combination

Normal

Unusual

Extreme

Ineffective drains or unusual ice

Post-seismic

Seismic

Flood

allowable stresses in tension






  • Lift joints

0

0.025 f 'c  

0.033 f 'c

0.075 f 'c 

0.05 f 'c
  • Base contact

0

0

0

0

0

allowable stresses in compression






  • Lift joints

0.33 f 'c

0.5 f 'c  

0.67 f 'c

0.9 f 'c 

0.67 f 'c
  • Base contact

0.25 f 'c

0.5 f 'c

0.5 f 'c

0.67 f 'c

0.5 f 'c

Resultant position

1/3 median

1/2 median

In section

In section

In section

Sliding Safety Factor






  • Peak with tests

3.0

2.0

2.0

1.3

1.3
  • Peak without tests

2.0

1.5

1.5

1.1

1.1
  • residual

1.5

1.3

1.1

1.0

1.0

Uplifting Safety Factor

1.2

1.1

1.1

1.1

1.1