Introduction to Stringer-Panel Models

Abstract

The stringer-panel model (SPM) is intended as companion method to the better-known strut-and-tie model (STM) for the design of D-regions where Bernoulli beam theory does not apply. To explain the merits of the SPM, first an overview of the STM is presented, setting out its design steps and challenges. The SPM applies two different elements: stringers to carry normal forces, and panels for the transmission of uniform shear membrane forces. The SPM has its roots in two different disciplines: on the one hand structural concrete plasticity, and on the other linear-elastic analysis of redundant aeroplane structures. The SPM can be used in such various fields as seismic design and performance-based design. The focus of the book is on building the model and determining the forces in stringers and panels. For simple models, analysis by hand will suffice. For more complicated models, two programs on the Internet are freely accessible.