BI-DIRECTIONAL PSEUDO-DYNAMIC TEST OF CIRCULAR SECTIONAL CFST BRIDGE PIERS

Bi-directional loading test are carried out to examine response behavior of circular sectional CFST bridge piers under the prescribed ground accelerations in the Design Specification of Road Bridge in Japan. Both unilateral and bi-lateral excitations are imposed to the 2.25m high pier models with the cross sectional diameter of 480mm. It is found from the test results that the maximum restoring force of test specimens obtained in bi-directional loading tests was almost the same as that obtained in single-directional loading tests. However, deformation capacity of CFST bridge piers deteriorated considerably when subjected to bidirectional dynamic loadings.