Seismic Isolator Hdrb High Damping Bearing Building Support Bearing for Bridge Construction

• Customization: Available
• After-sales Service: Installation Guide
• Warranty: 3years
• Model NO.: JTLRB-001
• Certification: GB, ISO,SGS
• Usage: Beam Bridge, Highway Bridge, Railroad Bridge
• Structure: Laminated Rubber Bearing
• Material: Rubber Bearing
• Activity: Multi Direction Movable Bearing
• Materil: Nr/Cr
• Hardness (Shore a): 60-70
• Certificate: CE, ISO,SGS
• Payment: 50% Deposit+50% Balance Payment
• Tensile Strength: ≥15 MPa
• Elongation at Break: ≥400%
• Temperature: -40℃ to 60℃
• Damping Ratio: 10 - 20%
• Design Shear Modulus G: 0.8 / 1.0 / 1.2 MPa Optional
• Vertical Stiffness Kv: 500~20000 kN/mm
• Feature: High Damping, Seismic Isolation, Self-Centering
• Application: Highway Bridge, Railway Bridge, Building
• Transport Package: on Pallet with PE Film
• Specification: NR/CR with lead core
• Trademark: HengJingGong
• Origin: Hebei
• HS Code: 4016999090
• Production Capacity: 100PCS/30days
• Package Size: 40.00cm * 40.00cm * 20.00cm
• Package Gross Weight: 60.000kg

Product Description

Product Description

High Damping Rubber Bearing – Fixed and Sliding Types for Large Displacement
    , also called HDR bearing pad, is one of seismic isolation bearing. It has excellent seismic isolation performance to effectively reduce the bridge damage caused by earthquake.

    is composed of specialized designed rubber with high damping performance, sandwiched together with steel plate layer. When installing, the high damping rubber bearing is commonly used with top and bottom steel plate and connection accessories.

Functions

    1.Period Extension: Horizontal stiffness 0.5-2.0kN/mm, extends structural period by 2-3 times

    2.Energy Dissipation: Full hysteresis loops with equivalent damping ratio 15%-25%

    3.Load Support: Vertical capacity 500-30,000kN, stably supports superstructure

    4.Self-centering: Automatically returns to initial position, residual deformation <5%

    5.Displacement Limiting: Limit device activates at large deformation to prevent falling off

Working principle

During earthquake, the vibration from various directions will impact fixed base building and results in deformation and building or bridge damages. The is improved through high damping material, which the damping ratio can approach to 15% to 18%.

When the earthquake comes, the will increase the horizontal displacement through rubber shear deformation and reduce friction coefficient. The large displacement can weaken the vibration from all direction and reduce the damage of building and bridges.

Joint structure

*The . It is designed with top and bottom embedded steel plate. And the rubber bearing is connected with pier and beam by sleeve. The top and bottom loading plate is connected with sleeve by anchor bolt. The top and bottom embedded steel plate is connected with sleeve by welding.
*. It is designed with top embedded steel plate and without bottom embedded steel plate. The bottom loading bearing is connected with sleeves with anchor bolts. The top embedded steel plate is connected with top loading plate with shear tenon. And the top embedded steel plate is connected with sleeve by welding.

HDR (Ⅰ) rubber bearing.

HDR (Ⅱ) rubber bearing.

Specification

Parameter Name	Unit	Specification Range
Damping Ratio	%	≥12
Load Capacity	kN	As per design requirement
Vertical Stiffness	kN/m	As per design requirement
Horizontal Stiffness	kN/m	As per design requirement
Vertical Compression Deformation	mm	≤10
Horizontal Deformation	mm	≤30
Durability	-	Fatigue life over 20 million cycles
Temperature Range	℃	-40 to +70

Damping structure

*Fixed type (HDR rubber bearing). The high damping rubber has excellent horizontal shear performance to bear the horizontal force. It can absorb vibration through large displacement in horizontal direction and hysteretic energy.

    *Rectangular HDR rubber bearing.
    *Round HDR rubber bearing.
*Sliding type (LNR rubber bearing). The displacement is achieved by sliding friction. The top stainless steel plate and PTFE sliding plate can reduce friction coefficient and achieve large displacement for shock absorption.

    *Rectangular LNR rubber bearing.
    *Round LNR rubber bearing.

Installation

Type

Product Details

Packaging & Shipping

Company Profile

    Hengshui Jingtong Rubber Co., Ltd., located in Hebei Province's Hengshui City, is a professional manufacturer of engineering rubber products. Our product range includes bridge bearings, expansion joints, water stop strips, water stop belts, inflatable cores, building deformation joint device and water plugs, which are widely used in bridge, tunnel, water conservancy, and power engineering projects. The company boasts advanced technology and mature processes to ensure reliable product quality.

    We have a professional technical team and a comprehensive after-sales service system to ensure customers receive high-cost-performance products and attentive service. Hengshui Jingtong Rubber Co., Ltd. is committed to continuous innovation to meet market demands and looks forward to esta  blishing long-term cooperative relationships with customers from both domestic and international markets.

FAQ

Q1: What is a high damping bridge bearing? 
A: It is a laminated rubber bearing made with a high damping compound that also absorbs quake energy.

Q2: How does it differ from a plain laminated bearing? 
A: The compound gives a higher damping ratio, so the bearing dissipates energy as well as carrying load.

Q3: Does it need a separate damper? 
A: No -- load carrying, restoring force, and damping sit in one unit.

Q4: Is a lead core used? 
A: No -- the HDR type damps through its rubber compound, without a lead plug inside the body.

Q5: Where is it used? 
A: Highway viaducts, railway bridges, approach spans, seismic zone bridge seats, and building isolation.

Q6: What temperature range does it work in? 
A: Public peer data gives -40 Celsius to +60 Celsius for the HDR range; the NR material limit is -40 Celsius.

Q7: How is the size chosen? 
A: By site seismic level, deck load, design displacement, and rotation at the seat.

Q8: Can size and shear modulus be customized? 
A: Yes -- diameter, rectangular size, shear modulus, and rotation are made to the project drawing.