·Earthquake zone on the plate boundary

·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

• Earthquake is the energetic phenomenon and the earthquake energy concentrate on the fixed structure giving the damage

◈ 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

• Changing up to 600% in rubber shearing deformation

• · 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!!