Semi-rigid composite connections for gravity loads

Abstract

This paper shows how the use of semi-rigid composite connections can lead to substantial weight savings for braced frames. The design method required to obtain these benefits is relatively simple, and can easily be programmed into a personal computer. A method is given in this procedure to calculate the deflections due to live load, which incorporates the non-linear connection behavior. This design procedure assumes unshored construction, which leads to smaller weight savings in the beams, as the dead loads are carried by rotationally weak connections instead of by the semi-rigid composite connections. In shored construction the entire load will be carried by the semi-rigid composite connections, further reducing the weight of beams required, and expanding the range for which this method would provide savings.