| Applying composite structure using steel-pipes with outer ribs to wall-type bridge pier、 its construction cost can be saved and construction period can be shortened. In this paper、in order to investigate earthquake-resistant performance of this type of bridge piers、 lateral cyclic loading tests were conducted. The influences of loading width and filling concrete at the base of steel-pipes were experimentally discussed. From this study、 following results were obtained: 1) the influence of loading width and filling concrete at the base of steel-pipes on load carrying behavior is not remarkable; and 2) in case of not filling concrete and decentralized loading、 load share ratio for each steel-pipe may not be improved. |
