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 analysis requires that the El Centro shock be applied in the X and Z directions using a factor of 1.0, and in the Y direction using a factor of 0.667.

No spectrum definition is required for this shock. El Centro is a predefined spectrum. All shock data resides in the CAESAR II shock database.

Example 2

The analysis requires the use of the Nuclear Regulatory Guide 1.60 shock loads. At a maximum acceleration value of 0.25 g’s, analysis is to be performed using 1.0 times the horizontal and vertical components of the shock as specified in Reg. Guide 1.60.

There is no spectrum definition required for either of these two shock loads. The Reg. Guide 1.60 shock spectra are predefined. You must only specify the maximum acceleration (ZPA) of 0.25 g’s on the Control Parameters Tab and must use the Reg. Guide spectra corresponding to the anticipated system damping. Lower damping values mean more conservative results.

Example 3

The analysis requires a shock spectrum that is given by the client and developed for the site. A plot of the spectrum appears as follows. The horizontal axis is period and the vertical axis is acceleration. Because of the variation of the numbers along each axis, a logarithmic interpolation for each axis is used. Because the shock name is not preceded by a (#) sign, the spectrum is not predefined, and you must manually enter the points for this spectrum. The spectrum definition input for pointing to this file is:

Name

Range Type

Ordinate Type

Range Interpol

Ordinate Interpol

BENCHNO4

PERIOD

ACCELERATION

LOG

LOG

Example 4

All analysis on a project requires the use of the spectrum table shown as follows. The data points of the spectrum are entered into an ASCII file named BENCH1 in the current folder. The file can be created using any standard editor. The spectrum definition input for pointing to this file is:

Name

Range Type

Ordinate Type

Range Interpol

Ordinate Interpol

#BENCH1

PERIOD

ACCELERATION

LOG

LOG

Listing of ASCII file "BENCH1":

* SPECTRUM FOR NUCLEAR BENCHMARK NO.1. THIS SPECTRUM IS

* TO BE USED FOR ALL LINES ON PROJECT 1-130023-A03.

* FILENAME = "BENCH1"

* RANGE TYPE = PERIOD (SECONDS)

* ORDINATE TYPE = ACCELERATION (IN./SEC./SEC.)

* INTERPOLATION FOR BOTH AXES = LOGARITHMIC.

PERIOD(SEC)

ACCELERATION(IN/SEC/SEC)

0.1698E-02

0.1450E+03

0.2800E-01

0.3800E+03

0.5800E-01

0.7750E+03

0.7100E-01

0.7750E+03

0.9100E-01

0.4400E+03

0.1140E+00

0.1188E+04

0.1410E+00

0.1188E+04

0.1720E+00

0.7000E+03

0.2000E+00

0.8710E+03

0.8710E+03

0.2500E+00

0.3230E+00

0.4000E+03