Dynamic and static collapse tests of reinforced-concrete columns

The reinforced-concrete column damage pattern differences between static cyclic loading tests and dynamic shaking-table tests were observed. In this study, the spacings of shear reinforcement bars in columns were variable. Four types of shear reinforcement bar spacing are used. As a result of the tests, it was verified that the maximum horizontal strengths of columns, the deformation capacities and the damage patterns were changed with the shear reinforcement bar spacings, and also with testing method differences between statics and dynamics. Furthermore, P-δ effects were discussed. (orig.)