Full Description

This investigation is concerned with beam-to-column moment connections that are proportioned to resist a combination of high shear force and plastic moment of the beam section. A theory based upon mathematical models and physical models is developed to predict the over-all load-deflection behavior of connections. In the analysis, it is assumed that the bending moment exceeding the yield moment of the beam section is carried by flanges due to strain-hardening, and the shear force is resisted by the web. The deformation of the connection panel zone is considered. Predictions by current plastic analysis and a finite element analysis are also included for comparison.

Experiments were carried out on specimens made of ASTM A572 Gr. 55 steel, with fully-welded or with bolted web attachments having round holes and slotted holes. These specimens were designed incorporating all possible limiting cases in practical connection design, and were subjected to monotonic loading. Web attachments were fastened by A490 bolts utilizing a higher allowable shear stress of 40 ksi for bolts in bearing-type connections.

A good correlation between the theoretical predictions and test results was obtained. It is concluded that flange welded web-bolted connections may be used under the assumption that full plastic moment of the beam section is developed as well as the full shear strength.

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Published: 1973 Number of Pages: 41 File Size: 1 file , 1.7 MB