Seismic Design Practice in Japan Introduction History of Earthquake Damage and Development of Seismic Design Methods Damage of Highway Bridges Caused by the Hyogo-ken Nanbu Earthquake 1996 Seismic Design Specifications of Highway Bridges Basic Principles of Seismic Design • Design Methods • Design Seismic Force • Ductility Design of Reinforced Concrete Piers • Ductility Design of Steel Piers • Dynamic Response Analysis • Menshin (Seismic Isolation) Design • Design of Foundations • Design against Soil Liquefaction and Liquefaction-induced Lateral Spreading • Bearing Supports • Unseating Prevention Systems. | Unjoh S. Seismic Design Practice in Japan. Bridge Engineering Handbook. Ed. Wai-Fah Chen and Lian Duan Boca Raton CRC Press 2000 44 Seismic Design Practice in Japan Shigeki Unjoh Public Works Research Institute Introduction History of Earthquake Damage and Development of Seismic Design Methods Damage of Highway Bridges Caused by the Hyogo-ken Nanbu Earthquake 1996 Seismic Design Specifications of Highway Bridges Basic Principles of Seismic Design Design Methods Design Seismic Force Ductility Design of Reinforced Concrete Piers Ductility Design of Steel Piers Dynamic Response Analysis Menshin Seismic Isolation Design Design of Foundations Design against Soil Liquefaction and Liquefaction-induced Lateral Spreading Bearing Supports Unseating Prevention Systems Seismic Retrofit Practices for Highway Bridges Past Seismic Retrofit Practices Seismic Retrofit after the Hyogo-ken Nanbu Earthquake Nomenclature The following symbols are used in this chapter. The section number in parentheses after definition of a symbol refers to the section where the symbol first appears or is defined. a space of tie reinforcement Section ACF sectional area of carbon fiber Figure Ah area of tie reinforcements Section Aw sectional area of tie reinforcement Section b width of section Section cB coefficient to evaluate effective displacement Section cB modification coefficient for clearance Section d modification coefficient Section cc modification factor for cyclic loading Section cD modification coefficient for damping ratio Section ce modification factor for scale effect of effective width Section cE modification coefficient for energy-dissipating capability Section cP coefficient depending on the type of failure mode Section cpt modification factor for longitudinal reinforcement ratio Section 2000 by CRC Press LLC CR CW CZ d d D De Ec ecf Edes FL F u h hB hB h h hBi hp
