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Earthquake Resistant Expansion
Joint using Hinge Finger Type
2007. 12
We make the happy world !
ILWONTECH Co., Ltd.
ILWON
ILWONTECH Co., Ltd.
·Earthquake zone on the plate boundary
-New Zealand, USA, Japan (Earthquake-resistant advanced countries)
1.Status of earthquake Damage1)Geological earthquake
·Earthquake zone within the plate -USA: Northeastern area -China: Jaeseong Earthquake in 1975
Tangshan Earthquake in 1976
ILWONTECH Co., Ltd.
2) Major earthquakes of the world (since 1900’s)
OrderDate of
occurrenceArea
No. of casualty (people)
Magnitude
1 2005.10.08Northern area,
Pakistan86,000 7.6
2 2004.12.26 Sumatra, Indonesia 283,106 9.0
3 2003.12.26 Southern area, Iran 31,000 6.6
4 2001.01.26 Gujarat , India 20,085 7.7
5 1999.08.17 Izmit, Turkey 15,657 7.4
6 1990.06.20 Rasht, Iran 45,000 7.7
7 1988.12.07Armenia (the Soviet
Union)30,000 6.8
8 1976.07.27 Tangshan, China 242,000 7.6
9 1970.05.31 Peru 66,000 7.8
10 1939.12.27 Erzincan, Turkey 23,000 8.0
11 1923.09.01 Kanto, Japan 143,000 8.2
12 1920.12.16 Kansu, China 180,000 8.5
13 1908.12.28 Messina, Italy 120,000 7.5
(Over 10,000 casualty)
ILWONTECH Co., Ltd.
3) Example of damaged bridge by earthquake
◈ Kobe earthquake, Japan
-Date of occurrence : 01.17.1995
-Casualty : 6,300 people
-Wounded : 35,000 people
-Magnitude : 7.2
ILWONTECH Co., Ltd.
◈ Loma Prieta earthquake
- Year of occurrence : 1989- Magnitude : 7.1- Among 4,250 bridges
·Minor damage: 89 ·Major damage: 11
Collapse of the upper part of the steel trust bridge (Oakland Bay Bridge)
Breakdown of the punching in the upper structure (State Highway Bridge)
ILWONTECH Co., Ltd.
◈ Northridge earthquake
- Date of occurrence : Jan 17,1994
- Casualty : 57 people- Wounded : 90,000 people
Antelope Valley Freeway
Santa Monica Freeway
ILWONTECH Co., Ltd.
2. Improvement of aseismatic performance in Bridges
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
1) Standard of earthquake-resistant design
ILWONTECH Co.,Ltd.
2) Basic policy of the 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.
ILWONTECH Co., Ltd.
3) Aseismatic level of the Road Bridge and seismic design
Aseismatic level
BridgeAverage cycle of
occurrence of seismic design
First class Bridges
-Bridges on highway, driveway, special city road, metropolitan road or general local highway - Bridge on roads built for preventing disaster in local area, city and province and important bridges considered in daily planned traffic volume- Elevated bridge passing over the road building first class bridge against the earthquake
1000 years
Second class
- Bridges excluded in the first class of the aseismatic level
500 years
ILWONTECH Co., Ltd.
4) Response Correction FactorIn case of satisfying all the design requirements for the earthquake-resistant design, designed seismic force for each member and joint part of bridge is the value of the elastic seismic force divided by the response correction factor., In case of the lower structure, however, the longitudinal force and shearing force are not divided by response correction factor.
Lower structure R Connection part (1) R
Box frame type pier 2Abutment of the upper structure 0.8
Steel concrete pile frame (Bent)1. In case of using vertical pile only 32. In case of using more than one batter pile 2
Expansion within a span of the upper structure 0.8
Single column 3Column, pier or pile frame and cab beam or upper structure 1.0
Steel or composite steel or concrete pile frame1. In case of using vertical pile only 52. In case of using more than one batter pile 3 Column or pier & base 1.0
Multiple frame 5
Note : (1) The connection part means the device delivering the shearing force and compressive force between members and includes bridge bearings and shearing key. At this time, the response correction factor is applied to the elastic seismic force into the working direction.
ILWONTECH Co., Ltd.
5) Change of the concept in earthquake-resistant design
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
ILWONTECH Co., Ltd.
6) Earthquake-proof system for bridges◈ Approach of the earthquake-proof system
Earthquake is the energetic phenomenon and the earthquake energy concentrate on the fixed structure giving the damage
The Large plate displacement
Structural deformation
Induced energy
Damage
Earthquake
ILWONTECH Co., Ltd.
Damage of the expansion joint and anti-falling pin
Damage of Rahmen pier (fixed axis)
Upper plate falling down
Damage of Rahmen tie beam pier
ILWONTECH Co., Ltd.
Plate displacement
Induced energy
◈ 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.
ILWONTECH Co., Ltd.
7)Development Status for the seismic prevention system
◈Bearing system – rubber bearing· 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
ILWONTECH Co., Ltd.
◈Supporting device - LRB, HDR
· Seismic isolation support integrated with damping function· Support injecting lead with excellent plasticity· Support using high damping rubber
ILWONTECH Co., Ltd.
◈Damper
·Oil damper Using low viscosity fluid Low dependency on temperature Complicated inner structure
·Viscosity damper Using high viscosity fluid High dependency on
temperature Simple inner structure
Upper Plate Structure
Measuring Device
Quake Isolation Device (Friction Bearing, Lead Rubber Bearing)
Reaction energy fixed anchor
Quick Release Jack
ILWONTECH Co., Ltd.
◈Device preventing the bridge falling
·Cable confining device from SEEE company
Upper Plate
Expansion Joint
Cable type Bridge falling block system
pier
Buffer
Bearing
Spring
Stopping Plate
Protection Cab
Connection Cable (PC Cable) Nut
Cladding material (Polyethylene resin)
Buffering (Bearing plate + Buffer packing)
Mansion
ILWONTECH Co., Ltd.
1) ERJ - Use : long-span vertical expansion joint - Expansion : 300 ~ 800mm
3. Earthquake Resistant Expansion Joint (ERJ) of Finger type structure by using Hinge
Patent NO.10-20060071877, NO.10-20060071878 Assigned to Technical Innovation Class “A” in the propriety evaluation of new
technology idea
ILWONTECH Co., Ltd.
2) ERJ (Earthquake Resistant Expansion Joint) Deal drawing
(Rubber Plate)
ILWONTECH Co., Ltd.
3) ERJ standard cross sectional view
ILWONTECH Co., Ltd.
3) ERJ ground plan
course of a vehicle
Direction of a vehicle
Direction of a vehicle
ILWONTECH Co., Ltd.
4) Characteristics of ERJ movement
Longitudinal movement
Transversal movement
Up& Down movement
ILWONTECH Co., Ltd.
5) Detailed drawing of the Rubber Seal in the lower part
Bonding picture
Installation picture
ILWONTECH Co., Ltd.
6) Comparison Table of earthquake-resistant expansion joints
ClassificationEarthquake-resistant expansion
joints(ILWON)
Earthquake-resistant expansion joints
(Other companies)Structure Simple Complicated
Movement feature
Enough to move into three directions of X, Y, and Z axles
Limited up & down movement into Z axle Allow the movement into X and Y axles
Maintenance
-Partial repair due to its unit structure
-can be replaced the Rubber Seal only
from the lower laying gap without any traffic control - No traffic control
- Partial repair is impossible due to its monolithic structure
- Full traffic control
Applicability Easy to construct due to its simple structure
- Requires heavy equipment for the installation due to its monolithic structure - Full traffic control
Ride quality Satisfactory with its Finger type structure
- Heavy noise with its discontinuous structural feature reducing the ride quality
Product price(Expansion
400mm)
Low price , about USD 9,700 / meter
High price , about 17,100 / meter
ILWONTECH Co., Ltd.
Thank you so much!!