*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/

NSENGI_steel_structures@eng.nssmc.com

Contacts

Head office

Manila Branch

URL

e-mail

*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