RESEARCH PROGRESS ON ASEISMIC DESIGN OF BRIDGES

San Fernando Earthquake, Tangshan Earthquake, Loma Prieta Earthquake, Northridge Earthquake, Kobe Earthquake and Chi-Chi Earthquake etc. destroyed the transportation system seriously. The interrupted transportation induced by earthquake will affect salvation, enlarge loss of parasitic infestation. In recent 30 years, lessons of earthquake damage have taught us to make the research on aseismic design for bridges to be recognized gradually. Consequently, the methodology and technology about aseismic design are improved. The concept and method for analysis and design, code for aseismic design and technology for reducing seismic response and retrofitting are developed. At this end, the history, state-of-art and future of this research field are discussed.