Seismic Isolation Bearings Laminated Elastomer Rubber Bearing for Bridge

Product Description

Product Description

– Standard and Sliding Types for Different Bridge Span

acts as the core load-transfer medium connecting the superstructure to piers and abutments. Under vehicles, pedestrians and temperature variation, it transmits loads smoothly and releases displacement and rotation, keeping the bridge safe and quiet. laminated with rubber and steel provide softness and damping, while sliding bridge bearings equipped with stainless sliders and seals allow free movement and offer long-term, reliable support.

In harsh environments such as coastal salt spray, plateau UV or urban pollution, maintain flexibility and strength thanks to weather-resistant compounds and fully encapsulated construction, avoiding brittleness, corrosion or oil leakage and realizing a maintenance-free service life equal to that of the bridge. Designed to international standards and subjected to strict fatigue and seal tests, every bridge bearing delivers stable mechanical behaviour and lasting durability.

Introduction

    The are made of several layers of natural rubber with reinforced steel inserted through sulfuration and adhesion. Laminated rubber bearings have enough stiffness and elasticity to transfer all load on bridge span structure to pier. Additional, it can bear the horizontal displacement, rotation and transformation caused by load.

    The can reduce the pier vibration and accommodate the horizontal movement on the bridge span structure caused by the temperature changing and thermal expansion.

Material	IRHD	Hardness	Tensile Strength	Elongation at Break	Compression Set
		Shore A	min. psi	min.	max.
Nature rubber	50	45-55	2500	450%	25%
	60	55-65	2500	400%	25%
	70	65-75	2500	350%	25%
Neoprene	50	45-55	2250	400%	35%
	60	55-65	2250	350%	5%
	70	65-75	2250	300%	5%

Installation

Product Details

are widely used for:
    *Highway, urban expressway and viaduct concrete or steel box-girder supports
    *Main-tower lower cross-beam and girder connections of long-span cable-stayed, suspension and continuous rigid-frame bridges
    *Special tapered and spherical steel bridge bearings for curved, graded and skew bridges
    *Seismic isolation bridge bearings in zones ≥ magnitude 8 to improve urban resilience
    *Bearing replacement in existing bridge jacking and retrofit projects, minimizing road closure time with rapid-exchange systems

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 laminated rubber bearing? 
A: It is a bearing with steel plates bonded between rubber layers for bridge support.

Q2: How does it resist earthquakes? 
A: The rubber layers absorb and damp seismic force before it reaches the piers.

Q3: What loads can it carry? 
A: Load rating is set by plan size and steel plate design.

Q4: Where is it used? 
A: Highway bridges, railway bridges, viaducts, and seismic zone structures.

Q5: What rubber grades are available? 
A: NR, neoprene, and EPDM are matched to the climate.

Q6: What temperature range does it serve? 
A: Service temperature is -40°C to +80°C.

Q7: How long does it last? 
A: Design life is over 50 years under bridge service.

Q8: Can size and load rating be customized? 
A: Yes -- plan size, thickness, and load rating are made to order.