Abstract
Normalized moment-rotation relationships, representing different families of connections, are needed to facilitate the design of frames with semi-rigid connections. This chapter takes stock of some efforts to define and use normalized moment-rotation curves based on mechanistic models of the connection components. The goal is to illustrate one approach to how analytical equations for design analysis can be developed and applied. To focus attention on the overall framework of the problem, only the simple case of a top and seat angle connection (no web angles) is considered. This chapter utilizes mechanistic equations developed by Kishi and Chen for top and seat angle connections (without web angles) to elucidate some of the issues associated with development and application of such equations for design of semi-rigid frames.
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