Section 71 of 102
70. Loads and Actions
Stable section ID: S05-CON-007-SECTION-71 · 62 content blocks
BDL shall represent loads and actions applied to structural, mechanical, thermal, electrical, fluid, and other engineering systems.
Load and Action Types may include:
permanent;
imposed;
wind;
snow;
seismic;
soil;
hydrostatic;
thermal;
shrinkage;
creep;
impact;
vibration;
transportation;
lifting;
assembly;
maintenance;
accidental;
fire-condition;
pressure;
electrical fault;
robotic interaction.
Each Load or Action shall define:
Load ID;
load type;
source;
magnitude;
unit;
direction;
point, line, surface, volume, or system distribution;
coordinate system;
duration;
variation;
applicable state;
uncertainty;
evidence or calculation reference.
Example:
load Roof_Dead_Load {
type: permanent;
applied_to: @Roof_Panel_RP01;
distribution: uniform_surface;
magnitude: 0.65 kPa;
direction: global_negative_z;
source: @Roof_Assembly_Mass_Model;
}
A load case shall group simultaneous actions:
- load_case LC_Seismic_X {
- actions: [
- @Permanent_Loads,
- @Occupancy_Loads,
- @Seismic_Action_X
];
}
A load combination shall identify the governing Profile and factors:
load_combination ULS_Combination_01 {
based_on: @Structural_Engineering_Profile;
expression:
factor(1.2, @Permanent_Loads)
+ factor(1.0, @Seismic_Action_X);
}
BDL shall store the load definition and governing method without replacing the validated engineering-analysis system.