Within seismic spandrels, longitudinal and diagonal reinforcement are resolved independently. Formulation is described as follows:
Longitudinal reinforcement is based on the flexural stresses that are resolved according to conventional beam conditions. These values are dependent upon section dimensions and moment demands.
Diagonal reinforcement is determined through shear calculation, and reported in addition to orthogonal shear reinforcement only when spandrel length/depth is less than 4.0, as required by code. Spandrels with small legth/depth ratio are typically governed by shear demand, rather than flexural. Additional information on spandrel shear design is available through Help Documentation > Shear wall design.
*Related Incident:*
* {incident:no=49409|comment=Design of coupling beams with digonal reinf.}