Earthquake Engineering Research - HKU Libraries - The University ...

315
FIGURE 5.
RETROFIT OF FIXED PIER BY STEEL PLATE
CONCLUSIONS
Korea belongs to a region of moderate seismic hazard. Earthquake resistant design was introduced to in
1992 for highway bridges. New performance-based design concept was developed in 1997 and
included in 2000 edition of Korea Highway Bridge Standards. Based on the research results on the
performance of bridges designed conventionally the limited ductility design approach appropriate to
Korea environment is under active development. In addition, various anti-seismic devices are actively
implemented to the multi-span continuous bridge, cable-suspended bridge and cable-stayed bridges. In
this year the manual for seismic assessment of highway bridges was drafted in Korea. The manual for
retrofit also will be drafted soon. The existing bridges found to have very poor ductility due to the lap
spliced longitudinal bars. Therefore several important bridges have been retrofitted already prior to
accomplishment of manual. In near future many old bridges will be strengthened according to the
manual.
REFERENCES
Chai, Y.H., Priestley, M.J.N. and Seible, F. (1991). Seismic retrofit of circular bridge columns for
enhanced flexural performance. ACI Structural Journal 88: 5, 572-584.
Kim, J.K., Kim, I.H., Lim, H.W., and Lee, J.H.(2000). Seismic upgrading of existing circular RC pier
with steel jacket. Proc. ofEESK Conference 4:1, 341-349(in Korean).
Kim, J.K., Kim, I.H., Lim, H.W., Lee, J.H. and Lee, J.H.(2001). Cyclic loading test of bridge pier
models without seismic detailing. Proc. ofEASEC-8.