*1: Amplitude that the damper survives approx. 20 cycles.*2: Amplitude that the damper survives approx. 5 times.
City hall Hospital
Characteristics
NSUD40×4(N.L.T) 4 28 112 5,920 100 18.9 400 550NSUD40×6 6 28 168 8,880 150 18.9 400 550NSUD40×8 8 28 224 11,800 200 18.9 400 550NSUD45×4(N.L.T) 4 36 184 7,600 128 24.2 450 650NSUD45×6 6 36 276 11,400 192 24.2 450 650NSUD45×8 8 36 368 15,200 256 24.2 450 650NSUD50×4(N.L.T) 4 40 232 8,320 144 27.9 500 750NSUD50×6 6 40 348 12,500 216 27.9 500 750NSUD50×8 8 40 464 16,600 288 27.9 500 750NSUD55×4(N.L.T) 4 45 304 9,600 160 31.7 550 850NSUD55×6 6 45 456 14,400 240 31.7 550 850NSUD55×8 8 45 608 19,200 320 31.7 550 850NSUD60×4(N.L.T) 4 55 432 11,600 196 37.2 600 1,000
T(mm)
Yield ForceInitial
StiffnessK1
2ndStiffness
UltimateDeformation
*2
YieldDeformation
Qy(kN)
K2(kN/m)(kN/m)
δy(mm)
*1
(mm) (mm)
Damper Type Number ofU-element
Thickness
R44-600-4.5×26 0.44 600 4.5 26 117.0 5.1 1,060 468R44-650-4.9×26 0.44 650 4.9 26 127.4 5.1 1,150 509R44-700-5.3×26 0.44 700 5.3 26 137.8 5.1 1,230 551R44-750-5.7×26 0.44 750 5.7 26 148.2 5.1 1,310 592R44-800-6.0×26 0.44 800 6.0 26 156.0 5.1 1,420 624R44-850-6.4×26 0.44 850 6.4 26 166.4 5.1 1,500 665R44-900-6.8×26 0.44 900 6.8 26 176.8 5.1 1,580 707R44-1000-7.5×26 0.44 1000 7.5 26 195.0 5.1 1,770 780R44-1100-8.3×26 0.44 1100 8.3 26 215.8 5.1 1,940 863R44-1200-9.0×26 0.44 1200 9.0 26 234.0 5.1 2,130 936R44-1300-9.8×26 0.44 1300 9.8 26 254.8 5.1 2,290 1,019
Product NumberStatic Shear
Factor*1
(N/mm2)
OuterDiameter
(mm)
RubberThickness
per a Layer(mm)
Layers
TotalRubber
Thickness(mm)
S2 Factor*2
HorizontalStiffness
(kN/m)
UltimateDeformation
of Rubber(mm)
Rubber Bearing
500 550 600 650 700 750 800 850 900 1000 1100 1200 1300- - ○ ○ ○ - - - - - - - -- - - - ○ ○ ○ ○ ○ ○ - - -- - - - - - - - ○ ○ ○ ○ ○- - - - - - - - - - ○ ○ ○
NSUD40NSUD45NSUD50NSUD55
Outer Diameter of Isolator (natural rubber bearing) (mm)DamperType
NSUD40×4(N.L.T) 4 28 112 5,920 100 18.9NSUD40×8 8 28 224 11,800 200 18.9NSUD45×4(N.L.T) 4 36 184 7,600 128 24.2NSUD45×8 8 36 368 15,200 256 24.2NSUD50×4(N.L.T) 4 40 232 8,320 144 27.9NSUD50×8 8 40 464 16,600 288 27.9NSUD55×4(N.L.T) 4 45 304 9,600 160 31.7NSUD55×8 8 45 608 19,200 320 31.7
T(mm)
Yield Force2nd
StiffnessYield
DeformationQy
(kN)K2
(kN/m)δy
(mm)
*1
(mm)
Damper Type Number ofU-element
Thickness
*1: Amplitude that the damper survives approx. 20 cycles.*2: Amplitude that the damper survives approx. 5 times.
3. Variation of NS-UTM
2. Applicable Combination of Natural Rubber Bearing and NS-UTM (In case of S2=5.1)
1. Variation of Natural Rubber Bearing
Characteristics
Lineup of NS-UTM with Natural Rubber Bearing
NS-UTMNS-UTM with Natural Rubber Bearing
Specifications
NS-UTM
with natural rubber bearing
NS-UTM
Lineup of NS-UTM
8 U-element 4 U-element (N-type),standard
4 U-element (L-type),for corner column
4 U-element (T-type),for perimeter column
Examples of NS-UTM Applications
8 U-element 6 U-element 4 U-element (N-type),standard
4 U-element (L-type),for corner column
4 U-element (T-type),for perimeter column
NS-UTM
(U-shaped Steel Damper)
OSAKI CENTER BUILDING, 5-1, Osaki 1-Chome, Shinagawa-ku, Tokyo 141-8604, JapanTel. +81-3-6665-4330
Unit 1508, Cityland Herrera Tower 98 V.A Rufino St. corner Valero St.Salcedo Village, Makati City 1200, PhilippinesTel. +63-2-511-7959, +63-2-845-0749
http://www.eng.nssmc.com/english/
Contacts
Head office
Manila Branch
URL
*1: 0.60, 0.39, 0.34, 0.29 are also available. *2: Coefficient of outer diameter / total rubber thickness
*Please contact us for cases other than S2=5.1
± 400± 400± 450± 450± 500± 500± 550± 550
550550650650750750850850
InitialStiffness
K1
UltimateDeformation
*2(kN/m) (mm)
U-elements are made speciallytuned steel and fabricated atdesignated plants. They have stable hysteretic behavior,excellent fatigue property, less sensitivity.
High QualityNS-UTM has a varioussizes, damper element numbers,and combinations. It allows dampers to fit in any structures.
Plenty of Choice
NS-UTM offers an economical option to give large damping force.
Economic- Efficiency
NS-UTM has almost same hysteresis for any direction.
Non DirectionalEffect
What’s Seismic Isolated Structure? Performance Data
NS-UTM
NS-UTM(U-shaped Steel Damper)
1 2 3 4
Lower base PL
Upper base PL
Stud
Damper fixing bolt
U-element
Bearing fixing bolt
Upper flange plate
U-element
Connection bolt (Out of scope)
Bearing fixing bolt
Lower flange PL
Setting base PL(Out of scope)
Setting base PL(Out of scope)
Natural rubber bearing
Damper fixing bolt
Seismic energy input
Seismic isolation devise
Seismic energy input
Seismic Isolated Structure
Structures adapting seismic isolation devices enable to reduce earthquake energy input into superstructure.
Conventional Structure
Primary frame itself has to resist seismic force.
Behavior
Allocation image
Advantages
Under column:NS-UTM with natural rubber bearing
Under girder:NS-UTM
NS-UTM with natural rubber bearing
NS-UTM
After huge earthquake
Horizontal vibrationduring earthquake
Features
Conventional Structure Seismic Isolated Structure
Less damage of primary structural frame.Less toppling of furniture.
Severe damages on primary structure make thebuilding be unable to use continuously.
Vibration can be reduced drastically.Severe horizontal vibration.
Isolators transform severe ground motion intolong-periodical slow “swing”, Dampers absorb seismic energy and reduce building motion immediately.
Primary frame itself (columns and girders) resists an earthquake.
Dynamic loading test simulated great earthquake
Static loading test
Fatigue Characteristics
B-direction
A-direction
Shea
r d
efo
rmat
ion
rat
io γ
t (%)
Number of cycles to fracture (cycle)
1
10
100
1000
1 10 100 1000 10000 100000
0° 45°
90°
NS-UTM with natural rubber bearing
90°
0°
δt
δp δe
sδ[mm]
P [kN]
δt
δp δe
sδ[mm]
P [kN]
(2) In case of offset amplitude(1) In case of uniform amplitude
Loading direction of U-element
NS-UTM(NSUD 45 × 4)
NS-UTM with natural rubber bearing(NSUD 45 × 4-R44-800-6.0 × 26)
γt= δt/h
h
δγ= δ/h U-element
Natural rubber bearing
300
200
100
0
0 0.2 0.4 0.6-0.6 -0.4 -0.2
-100
-200
-300
Shea
r fo
rce(
kN)
Deformation(m)A-direction
Deformation(m)B-direction
300
200
100
0
0 0.2 0.4 0.6-0.6 -0.4 -0.2
-100
-200
-300
Shea
r fo
rce(
kN)
Deformation(m)A-direction
1000
600
200
400
800
-200
-600
-1000
-800
-400
0
Shea
r fo
rce(
kN)
-0.5 -0.4 -0.3 -0.2 -0.1 0.1 0.2 0.3 0.4 0.50Deformation(m)B-direction
1000
600
200
400
800
-200
-600
-1000
-800
-400
Shea
r fo
rce(
kN)
-0.5 -0.4 -0.3 -0.2 -0.1 0.1 0.2 0.3 0.4 0.50
Reaction beam
Test specimen
Shaking table
Test equipment Test specimen
0-20 20 40-40-40
-20
20
40
0
Y(cm)
X(cm)
Orbit
Example of applied displacement orbit (simulating JR Takatori Record of the Kobe EQ, 1995)
Definision of shear deformation ratio: γt