| In Japan，reinforced concrete piers of highway bridges have been strengthened with steel Plates bound around piers to resist earthquakes．To improve the earthquake resistance of piers，the method of attaching steel plates without a genearlly used bond，but with through-bolts，was considered．[*]In this paper，cyclic loading tests on piers strengthened or not strengthened were made to investigate the effects of strengthing the piers．The bridge pier models were wall type and 1/3 to 1/5 as large as a real bridge pier．The steel plates around pier models were band-shaped and were attached horizontally and vartically．The effective-ness of each method on earthquake resistance was checked． |
