·Earthquake zone on the plate boundary



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·Earthquake zone on the plate boundary

  • ·Earthquake zone on the plate boundary

  • -New Zealand, USA, Japan

  • (Earthquake-resistant advanced countries)





Kobe earthquake, Japan

  • Kobe earthquake, Japan



- Year of occurrence : 1989

  • - Year of occurrence : 1989

  • - Magnitude : 7.1

  • - Among 4,250 bridges

    • ·Minor damage: 89
    • ·Major damage: 11


- Date of occurrence : Jan 17,1994

  • - Date of occurrence : Jan 17,1994

  • - Casualty : 57 people

  • - Wounded : 90,000 people



Road standard specifications, Ministry of Construction, 1992

  • Road standard specifications, Ministry of Construction, 1992

  • Earthquake resistant design criteria, Ministry of construction & Transportation, 1997

  • Road bridge design criteria, Ministry of construction & Transportation, 2000

  • Road bridge design criteria, Ministry of construction & Transportation, 2005



Purpose of earthquake-resistant design

  • Purpose of earthquake-resistant design

    • Securing the quake-proof ability in order to minimize the damage of the bridge caused by the earthquake
  • Basic concept of earthquake-resistant design criteria

    • Minimizing casualties.
    • Allowing partial damage in bridge members but preventing entire collapse in case of earthquakes.
    • Making it possible to perform the basic function of the bridge in case of earthquake.
    • The Design Criteria can be applied to all area in South Korea.
    • A creative work can be acknowledged to develop more advanced design even though it does not follow the rule.






The existing earthquake-resistant design : increasing the strength of the structure

  • The existing earthquake-resistant design : increasing the strength of the structure

    • Beginning of the modern earthquake resistant design caused by Messina earthquake in Italy with magnitude 7.5 in 1908
    • Building the structure stronger can resist from the horizontal load generated by earthquakes
    • Aiming the prevention of collapse
    • Allowing the structural damage
    • Increasing seismic movement of the inside of the structure
  • A new earthquake-resistant design : controlling the seismic movement of the structure

    • Seismic movement control system reducing the required strength by using seismic isolation system or energy dissipation system


Approach of the earthquake-proof system

  • Approach of the earthquake-proof system





Application of aseismatic system

  • Application of aseismatic system

    • The system prevents the earthquake and terminates its energy. It makes smaller energy come into the structure reliving the remaining energy.


· Long cyclic function : Flexible horizontal transformation ability

  • · Long cyclic function : Flexible horizontal transformation ability

  • · Vertical load support function: sufficient load supporting ability

    • Supporting up to maximum 147 Mpa/cm2


· Seismic isolation support integrated with damping function

  • · Seismic isolation support integrated with damping function

  • · Support injecting lead with excellent plasticity

  • · Support using high damping rubber



·Oil damper

  • ·Oil damper

    • Using low viscosity fluid
    • Low dependency on temperature
    • Complicated inner structure




1) ERJ

  • 1) ERJ

  • - Use : long-span vertical expansion joint - Expansion : 300 ~ 800mm















Thank you so much!!

  • Thank you so much!!



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