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Isolators Base made in China Seismic Isolator Base for construction made in China seismic Lead rubber bearing for construction buildingService Loading Seismic Lead Rubber Bearing (LRB)Seismic Lead Rubber Bearing
Lead core rubber bearing,applied to building and bridge constructions, is a practical and cost-effective choice for seismic isolation. It is composed of laminated elastomeric bearing pad, top and bottom sealing & connecting plates and lead plug inserted in the middle of the bearing as shown in the following picture.
Working principle
The lead rubber bearing has same mechanical properties with laminated rubber bearing. Besides, it has high damping property.
As we all know, the laminated rubber bearing has large displacement deformation in horizontal direction.
In the earthquake, this structure can separate top and bottom structure vibration, enlarge self vibration cycle and reduce seismic force. Besides, the lead core will be squeezed and yielded during the shear process to dissipate Seismic force.
Specification
Technical parameter
| Technical index | Neoprene Rubber | Natural Rubber | |
| Hardness (IRHD) | 60±5 | 60±5 | |
| Strength Tensile (Mpa) | ≥17 | ≥18 | |
| Elongation at break (%) | ≥400 | ≥450 | |
| Brittleness temperature (ºC) | ≤40 | ≤-50 | |
| Constant compression permanent deformation | ≤15 | ≤30 | |
| Resistance to ozone aging test (test conditions,20% elongation,40ºC×96h) |
100ppmm | 25ppmm | |
| No cracking | No cracking | ||
| Hot air aging test (The biggest change comparing with before aging numerical) |
Test conditions (ºC×h) | 100×70 | 70×168 |
| Strength Tensile (%) | -15 | -15 | |
| Elongation at break(%) | -40 | -20 | |
| Variation in hardness (IRHD) | 0,+10 | -5,+10 | |
| Strength of rubber and steel Peel adhesive (KN/m) | >10 | >10 | |
| Strength of four fluorine plate and rubber (KN/m) | >7 | >7 | |
Function of Lead core bearing pads
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, 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 establishing long-term cooperative relationships with customers from both domestic and international markets.
Nancy
Add:Nanwangzhuang village,Hengshui City,Hebei Province,China
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