Examples - CAESAR II - Help

CAESAR II Users Guide

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CAESAR II
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CAESAR II Version
12

Example 1

The static load cases are:

1 = W+P1+D1+T1+H (OPE)

2 = W+P1+H (SUS)

3 = L1 - L2 (EXP)

The dynamic load cases are:

1 = Operating Basis Earthquake

2 = 1/2 the Operating Basis Earthquake

Combine the operating basis earthquake stresses with the sustained static stresses:

Load Case

Factor

STATIC2

1.0

DYNAMIC1

1.0

or

Load Case

Factor

S2

1

D1

1

Example 2

The static load cases are:

1 = W + P1 (For hanger design)

2 = W + P1 + D1 + T1 (For hanger design)

3 = W + P1 + D1 + T1 + H (OPE)

4 = W + P1 + H (SUS)

5 = L3 - L4 (EXP)

There is one dynamic load case. Create an occasional case that is the sum of the sustained and the dynamic stresses using the SRSS combination method and the ABS combination method. Additionally, combine the expansion static case and the dynamic case using the SRSS combination method. This is a total of three combination load cases. The first two static hanger design load cases cannot be used in a combination case.

* COMBINATION CASE 1:
* SRSS COMBINATION OF SUSTAINED AND DYNAMIC CASES

STRESSTYPE (OCC), COMBINATION (SRSS)

Load Case

Factor

STATIC4

1

DYNAMIC1

1

* COMBINATION CASE 2:
* ABS COMBINATION OF SUSTAINED AND DYNAMIC CASES

STRESSTYPE (OCC), COMBINATION (ABS)

Load Case

Factor

STATIC4

1

DYNAMIC1

1

* COMBINATION CASE 3:
* SRSSCOMBINATION OF EXPANSION AND DYNAMIC CASES

STRESSTYPE (OCC), COMBINATION (SRSS)

Load Case

Factor

STATIC5

1

DYNAMIC1

1

Stress type and combination are defined on the Directive Builder dialog box. For more information, see Directive Builder.

Example 3

The static load cases are:

1 = W+T1+P+D1+H (OPE)

2 = W+P+H (SUS)

3 = U1 (OCC) Static seismic simulation

4 = L1-L2 (EXP)

5 = L2+L3 (OCC) (SCALAR)

Create an SRSS combination of the static seismic case and both the sustained and operating static cases:

* COMBINATION CASE 1:

COMBINATION (SRSS), STRESSTYPE (OCC)

Load Case

Factor

STATIC2

1

STATIC3

1

* COMBINATION CASES 2:

COMBINATION (SRSS), STRESSTYPE (OCC)

Load Case

Factor

STATIC1

1

STATIC3

1

Example 4

The static load cases are:

1 = W+P1 (Hanger design restrained weight case)

2 = W+T1+P1+D1 (Hanger design load case #1)

3 = W+T2+P1+D1 (Hanger design load case #2)

4 = WNC+P1 (Hanger design actual cold loads)

5 = W+T1+H+P1+D1 (OPE)

6 = W+P1+H (SUS)

7 = L5-L6 (EXP)

Combine the static sustained stresses with 1/2 the shock case 1 results, 1/2 the shock case 2 results, and 1.333 times the shock case 3 results. The combination method is SRSS. For a second combination case, combine the static sustained stresses with 1/2 the shock case 4 results, 1/2 the shock case 5 results, and 1.333 times the shock case 6 results.

* COMBINATION CASE 1:

COMBINATION (SRSS)

Load Case

Factor

STATIC6

1

DYNAMIC1

1/2

DYNAMIC2

1/2

DYNAMIC3

1.333

or

COMBINATION (SRSS)

Load Case

Factor

S6

1

D1

0.5

D2

0.5

D3

1.333

* COMBINATION CASE 2:

COMBINATION (SRSS)

Load Case

Factor

STATIC6

1

DYNAMIC4

0.5

DYNAMIC5

0.5

DYNAMIC6

1.333