Earthquake Energy Partitioning in Bridge Structures with Seismic Isolators
New earthquake energy spectra are proposed for practical design procedures using energy concepts. The spectra show integrated earthquake input energy of a unit mass for a given natural period and damping ratio. The total input energy and its partitioning in complex structures can be evaluated with the conventional procedure of modal analysis and the proposed spectra. Numerical simulations are carried out for inelastic structures to show the earthquake energy partitioning in time and in space. Inelastic earthquake response and earthquake energy partitioning of bridge structures with and without seismic isolators subjected to earthquake ground motions is evaluated to verify their engineering significance.
KeywordsBridge Structure Viscous Damper Bridge Model Earthquake Response Total Input Energy
Unable to display preview. Download preview PDF.
- Iemura, H. (1984). “Hybrid Experiments on Earthquake Failure Criteria of Reinforced Concrete Structures,” Proc. 6th WCEE, VI, 103–110.Google Scholar
- Iemura, H., et al (1982). “Reduced DOF Approximations for Earthquake Damage Assessments of Deteriorating Hysteretic Structures,” Proc. 6th JEES, 1233–1240, Dec.Google Scholar
- H. Iemura, H., et al (1991) “On-line Earthquake Response Tests of High-Damping Rubber Bearings for Seismic Isolation,” Proc. 1st US-Japan Workshop on Earthquake Protective Systems for Bridges, Buffalo NY, Sept.Google Scholar
- Kato, B. and Akiyama, H. (1985). “Energy Input and Damages in Structures Subjected to Severe Earthquakes,” ProC., AIJ, No. 235, pp.9–18. (in Japanese)Google Scholar
- Ohno, T., et al. (1983). “Quantative Estimation of Plastic Energy Absorbed in Structures Subjected to Seismic Excitation,” ProC., JSCE, No. 333, 91–99, May. (in Japanese)Google Scholar