Lead Rubber Bearing (LRB bearing ) from Tiantie is made of multi-layer natural rubber and multi-layer steel plate, embedded with vertical lead core, which has good vertical bearing capacity and horizontal deformation capacity. As one of professional lead rubber bearing manufacturers, the lead core of the our LRB bearing can absorb seismic energy during plastic deformation, greatly increasing the energy consumption and wind resistance of the isolated building. (the support and the connecting plate are vulcanized as a whole)
LNR-I: As one of the experienced lead rubber bearing manufacturers, our production process is mature; Stable performance; Strong energy dissipation capacity.
LRB-II: The support of lead rubber bearing base isolation from Tiantie is machined as a whole, and the connection is more secure; Excellent performance; Live longer; Strong energy dissipation capacity.
LNR-I: As a type of seismic isolators for buildings, the lead rubber bearing is widely used in seismic isolation design and seismic strengthening and reconstruction of bridges, buildings, hydropower projects, building seismic facilities and other civil structures.
LRB-II: LRB bearing is widely used in seismic isolation design and seismic strengthening and reconstruction of bridges, buildings, hydropower projects, building seismic facilities and other civil structures.
Specifications (diameter, mm) | / | D400 | D500 | D600 | D700 | D800 | D900 | D1000 | D1100 | D1200 | D1300 | D1400 | D1500 | D1600 |
Shear modulus G | Mpa | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
Total height of bearing H | mm | 178 | 201 | 223 | 267 | 302 | 353 | 390 | 435 | 462 | 490 | 501 | 501 | 501 |
Total thickness of rubber layer Tr | mm | 74 | 93 | 111 | 129 | 147 | 166 | 184 | 202 | 221 | 240 | 240 | 240 | 240 |
First form factor S1 | / | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 |
Second form factor S2 | / | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 |
Vertical compression stiffness Kv | kN/mm | 1400 | 1800 | 2100 | 2600 | 3100 | 3800 | 4700 | 5500 | 6200 | 7100 | 8600 | 10400 | 12300 |
Horizontal equivalent stiffness(Shear strain 100%)Keq | kN/mm | 0.68 | 0.84 | 1.02 | 1.19 | 1.36 | 1.53 | 1.7 | 1.88 | 2.05 | 2.21 | 2.56 | 2.94 | 3.34 |
Yield force Q | kN | 1.04 | 1.27 | 1.58 | 1.89 | 2.08 | 2.37 | 2.69 | 3 | 3.18 | 3.47 | 4.06 | 4.7 | 5.11 |
Stiffness after yield Kd | kN/mm | 27 | 40 | 63 | 90 | 106 | 141 | 182 | 227 | 251 | 304 | 362 | 425 | 425 |
Stiffness before yield Ki | kN/mm | 0.68 | 0.84 | 1.02 | 1.19 | 1.36 | 1.53 | 1.7 | 1.87 | 2.04 | 2.2 | 2.55 | 2.93 | 3.34 |
Equivalent damping ratio heq | / | 23.50% | 22.60% | 24.00% | 24.70% | 23.10% | 23.90% | 24.60% | 25.10% | 23.90% | 24.40% | 24.80% | 25.20% | 23.20% |