Question

In a design of structures, an additional lateral load considered, to account for the initial imperfections of the structure geometry is called:
1. damping load
2. notional load
3. frictional drag load
4. rotational load

Answer 1

Correct Answer - Option 2 : notional load

Explanation:

Notional load:

A notional load is a lateral load that is derived from an existing vertical load case. This load type has been introduced to accommodate a requirement in design codes. It accounts for the initial imperfections of the structure geometry. The AISC 360-05 specification for example defines notional loads as lateral loads that are applied at each framing level and are specified in terms of gravity loads.

Rotational load:

Rotational load defines loads resulting from the rotation of the model. You can specify either angular velocity or rotary acceleration. Abaqus defines the load by using the square of the angular velocity or by using the acceleration directly. In either case, the load definition must include an axis of rotation, which is defined as follows:

• If you are working in three-dimensional space, you define the location and direction of the axis by entering the global coordinates of two points.
• If you are working in two-dimensional space, you specify the location of the axis by entering the coordinates of a point in the plane. The direction of the axis is always out of the plane.
• If you are working in axisymmetric space, the axis is always in the location and direction of the positive global Z-axis.