The Load class defines a forces or traction that can be applied to either a Node or to an Element respectively. The Load class is designed to:

Have an internal structure suitable for linear and nonlinear behavior.
Provide with functionalities that allow to construct mass, damping, and stiffness matrices as well as force vector.

The main member function in Load are:

Load::GetNodes()
This function returns the Node list where this Load is applied.
Load::GetElements()
This function returns the Element list where this Load is applied.
Load::GetLoadVector()
This function returns the load force at a certain time step.
Load::GetClassification()
This function returns an integer associated with the load model. The classification identifier are provided at Definitions.hpp and they are used in Assembler.hpp at Assembler::ComputeExternalForceVector() member function. So far, these are available:
- 1 : Static point load.
- 2 : Dynamic point load.
- 3 : Static point body load.
- 4 : Dynamic point body load.
- 5 : Static surface load.
- 7 : Static body load.
- 8 : Dynamic body load.
- 9 : Dynamic user's define wave load.
- 10 : Static/Dynamic displacement support motion.

The load formulation that can be considered in Seismo-VLAB are: