An Investigation of Riveted and Bolted Column-Base and Beam-to-Coumn Connections Under Slow and Rapid Loading

摘要

This report contains a description of slow and rapid load testsof riveted and bolted column-base and beam-to-column connections, and theresults which were obtained. Measurements of load, deflection, strain,and acceleration were taken in order to evaluate the resistance characteristicsof the connections.The small number of specimens and variety of connection typeslimited the scope of the investigation. The tests clearly indicated thatthe rate of deformation had an effe~t on the resistance of the connection;rapidly deformed specimens had a greater resistance at a given deflectionthan those tested slowly. In these tests, the type of fastener, rivet orhigh strength bolt, had little effect on the moment-rotation characteristicsof the connections studied. With respect to the evaluation ofspecific moment resistance characteristics of connections subjected torapid loading, this limited pilot study served only to indicate the natureof the resistance function which could be expected for connections of thetype te s ted.Also presented in this report is a procedure for evaluating theresistance of a frame with semi-rigid connections as it is loaded into theinelastic range. The method of analysis is such that the resistance characteristicsof the connection, as well as that of the members, are taken intoconsideration. The method is of particular interest from the research standpointsince strain hardening is included.