A growth of high quality thick diamond film has been carried out on high pressure and high temperature diamond substrate by microwave plasma chemical vapor deposition system. First, the effect of growth parameters on the growth film morphologies was investigated, indicating that the diamond film is very sensitive to the growth temperature and input microwave power. Then, sample holders with different geometries were used in our experiment, illustrating that high quality diamond film can be grown by using the sample holder with flat surface. Finally, the characterization of the as grown samples has been carried out.

Retrofitted reinforced concrete structures were modeled using fiber modeling technique extended to include the stress-strain relation of repair material such as grouted epoxy resin or covered steel plates. Earthquake response analysis was then conducted using inelastic hysteretic rules. Effectiveness of seismic retrofit was evaluated through comparison of ductility, hysteretic energy and damage index with the original members. The proposed method was verified by the test results of retrofitted RC beam members. As an application of this method, earthquake response of a strengthened RC bridge pier was simulated. The bridge pier with reinforcements terminated at mid-height was modeled including retrofitting by steel jackets. Thin steel jacket showed higher capacity than thick one because of its larger ductility.