2.13Inclined Supports

Fixed joints (supports) are assumed to be vertical or horizontal (parallel to one of the global axes). There are cases, however, when the support is inclined, e.g., when the foundation of a structure rests on a sloped surface rather than on a flat surface.

To define an inclined support, its inclination angle(s) from the global axis (or axes) must be input. The joint specified as an inclined support will then have its global axes rotated by the specified angle(s), and the support reactions will be presented with respect to the rotated axes.

For plane (2-D) structures, an inclination angle measured clockwise from the global X axis must be input. For space (3-D) structures, two inclination angles, measured clockwise, one from the global X axis and the other from the global Z axis must be input.

 

Figure 2.8 Inclined Support Angle