3-DOF Modular Joints

 

Introduction

Doshin Modular Expansion Joint System is a mechanical device installed in between bridge decks. Its main function is to allow for smooth vehicular movement across expansion joint openings. This is achieved by employing the use of lamella beams which divides the expansion joint openings into smaller individual gaps. The lamella beams are connected by EPDM rubber that acts as a watertight seal that prevents debris and water from passing through bridge expansion joints openings and damaging the bridge deck and structures below.

 

Advantages

Doshin Modular Expansion Joints cater for expansion joints with movement range exceeding 80 mm. The lamella beams work in series to accommodate the thermal expansion and contraction of bridge decks thus protecting it from damage.

The structural elements are made of superior and long lasting quality materials. All our products meet the stringent requirements of ISO 9001:2001 quality assurance requirements.

Doshin Modular Expansion Joints are highly durable, have no loose or moving steel parts thus totally eliminating it from damages due to frequent load changes. Lubricated PTFE, high-grade stainless steel, elastomeric components and plastics plays a part in enabling the movement of the Doshin Modular Expansion Joints.

Doshin Modular Expansion Joint

Doshin Modular Expansion Joint

Designation Of Types

Doshin Modular Expansion Joint System is a mechanical device installed in between bridge decks. Its main function is to allow for smooth vehicular movement across expansion joint openings. This is achieved by employing the use of lamella beams which divides the expansion joint openings into smaller individual gaps. The lamella beams are connected by EPDM rubber that acts as a watertight seal that prevents debris and water from passing through bridge expansion joints openings and damaging the bridge deck and structures below.

Type & Size

Max. range of movement

Recess space

Joint width

Weight
b1
b2
h
f0
f5
F65
F80
mm
mm
mm
mm
mmm
mm
mm
mm
kg/m
3-DOF 1
80
200
200
150
130
135
195
210
100
3-DOF 2
160
400
300
400
140
150
270
300
155
3-DOF 3
240
480
300
400
220
235
415
460
235
3-DOF 4
320
560
300
400
300
320
560
620
335
3-DOF 5
400
640
300
420
380
405
705
780
415
3-DOF 6
480
720
300
420
460
490
850
940
515
3-DOF 7
560
800
300
420
540
575
995
1100
595
3-DOF 8
640
880

300

440
620
660
1140
1260
695
3-DOF 9
720
960
300
460
700
745
1285
1420
785
3-DOF 10
800
1040
300
480
780
830
1430
1580
895

CHARACTERISTICS

Movements

Doshin Modular Expansion Joints allow movement in all 3 directions (ux, uy, uz) and rotations about all 3 axes (f x, f y, f z). Large movements in the bridge’s transverse direction (uy) and vertical direction (uz) of both the lamella beams and the cross beams are made possible due to the consistent elasticity of the support system.

 

Principle Of Elasticity

Highly advanced spring and damping system is incorporated in the modular expansion joint design due to its ability to reduce dynamic stresses thus protecting the joints and structural elements from excessive damage due to traffic movement.

 

Movement Capacity

The maximum movement capacity in all 3 directions (ux, uy, uz) of Doshin Modular Expansion Joints, and the angle permitted between the movement direction and its joint axis, are presented in the table below.

Type
Number of gaps
Max. longitudinal movement
Max. transverse movement
Standard Design
mm
mm
3-DOF 1
1
± 40
± 12
3-DOF 2
2
± 80
± 12
3-DOF 3
3
± 120
± 12
3-DOF 4
4
± 160
± 12
3-DOF 5
5
± 200
± 12
3-DOF 6
6
± 240
± 12
3-DOF 7
7
± 280
± 12
3-DOF 8
8
± 320
± 12
3-DOF 9
9
± 360
± 12
3-DOF 10
10
± 400
± 12

Standard Design: Standard joint with limited transverse movement capacity

Special Design: Available upon request

mj11
mj10
mj8
mj6
mj5
IMG_1005

For more information, please get in touch with us at: 603-3290 5619 / 603-3290 5621 or click here for enquiry us.

Doshin Rubber Products (M) Sdn. Bhd.

(114386-H)

Lot PT 34252, Jalan Sekolah
Rantau Panjang, 42100 Klang
Selangor Darul Ehsan, Malaysia.

PHONE
603-3290 5619 / 603-3290 5621

EMAIL
doshin@kossan.com.my

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