Welded Continuous Frames and Their Components: Analysis of Beam-and-Column Subassemblages in Planar Multi-Story Frames

摘要

Methods are developed for the analysis of beam-andcolumn subassemblages which constitute a part of a twodimensional multi-story frame. A subassemblage consists essentially of a column which is framed at its two ends with beams of known properties. When such a structure is subjected to load, the beams will deform with the column and thus provide rotational restraint at the ends of the column. The strength of the subassemblage therefore depends on not only the strength of the column member but also that of the beams. Two types of subassemblages are analyzed by the procedures presented; namely, the sway type and the nonsway type. A sway subassemblage is a subassemblage whose upper joint may translate with respect to the lower joint when subjected to load. Any horizontal force which is applied to the subassemblage is resisted by the column and the restraining beams. In a nonsway subassemblage, translation of the joints is assumed to be prevented and the lateral forces applied at the level of the joints are resisted directly by the supports. Another problem studied by the method developed for nonsway subassemblages is the analysis of beam-columns continuous over several supports.