Abstract
This paper presents results of full-scale loading tests of welded moment connections subjected to variable amplitude cyclic loadings. The tests were conducted by two types of loading protocols, i.e. the two different constant amplitudes and the random amplitudes. The deformation capacity of specimens are compared with predicted deformation capacity based on the relationships between crack propagation and number of cycles obtained from the constant amplitude cyclic loading tests. The predicted deformation capacity well corresponds to experimental results by the two different constant amplitude loadings, but for the random amplitude loadings, the modification to consider loadings in the elastic range is needed.
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