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TR.33 Reference Load Cases - Application

This topic describes how use defined reference load types in actual load cases.

Defining of Reference Loads is described in TR.31.6 Defining Reference Load Types.

General Format

The format of a reference to a reference load in a primary load (j) case is thus:

LOAD j (LOADTYPE type) load_title 
REFERENCE LOAD
Ri Fi (Rk Fk) … 
…
Note: Reference load definitions can also be used in repeat and notional load cases in addition to primary load cases. However, reference loads and repeat loads cannot be used within a reference load case.

Where:

ParameterDescription
Ri, Rk The reference loads used in the current primary, repeat, or notional load case.
Fi, Fk The load multiplier used for the corresponding load cases.

Example 1: Using Reference Loads in Primary Load Cases

Application of reference loads in any load case follows the definition of the reference loads.

DEFINE REFERENCE LOADS
LOAD R1 LOADTYPE Dead TITLE REF DL
   <load items> 
END DEFINE REFERENCE LOADS
⋮
LOAD 1 LOADTYPE Dead TITLE Factored DL
REFERENCE LOAD 
R1 1.2

Reference loads can be combined with other load items in the same primary load case:

LOAD 2 LOADTYPE None TITLE D+H
REFERENCE LOAD
R1 1.0 R4 1.0 
ELEMENT LOAD
1212 1267 TRAP GY JT -0.54 -0.44 -0.44 -0.54.

Example 2: Using Reference Loads with Repeat Loads

Reference loads can be combined with repeat loads in the same primary load case.

DEFINE REFERENCE LOADS
LOAD R1 LOADTYPE Dead TITLE REF DL
   <load items>
END DEFINE REFERENCE LOADS
⋮
LOAD 1
   <load items>
LOAD 2
REPEAT LOAD
1 1.2
REFERENCE LOAD
R1 1.2
Parent topic: Technical Reference of STAAD Commands
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