High Quality Lead Rubber Bearing

Lead Rubber Bearing

Lead rubber bearings are constructed by vertically inserting a lead core in the center of the rubber bearing.
Lead exhibits a notably low yield stress, approximately 7MPa, and favourable fatigue properties when subjected to plastic deformations. This unique combination allows lead rubber bearings to effectively dissipate the seismic energy, with the potential to achieve the damping ratio up to 25%.

Lead Rubber Bearing

Product Diagram

List of mechanical properties and specifications of type I lead-core building isolation rubber bearings
Model	Design bearing capacity kN	Effective diameter mm	Support body height mm	Total rubber thickness mm	First shape coefficient S1	Second shape coefficient S2	Horizontal performance value at 100% shear strain				Shear strain 250% horizontal equivalent degree kN/mm	Vertical stiffness kN/mm	Yield force kN
Model	Design bearing capacity kN	Effective diameter mm	Support body height mm	Total rubber thickness mm	First shape coefficient S1	Second shape coefficient S2	Horizontal equivalent stiffness kN/mm	Equivalent damping ratio (Heq)%	Stiffness before yield kN/mm	Stiffness after yield kN/mm	Shear strain 250% horizontal equivalent degree kN/mm	Vertical stiffness kN/mm	Yield force kN
LRB400	1884	400	156	73	≥15	≥5	1.04	23	8.84	0.68	0.79	1450	27
LRB500	2944	500	183	92	≥15	≥5	1.27	23	10.92	0.84	0.97	1850	40
LRB600	4239	600	201	110	≥15	≥5	1.58	23	13.13	1.01	1.20	2200	63
LRB700	5770	700	241	129	≥15	≥5	1.81	23	15.21	1.17	1.38	2700	83
LRB800	7536	800	270	148	≥15	≥5	2.05	23	17.29	1.33	1.56	3100	106
LRB900	9538	900	291	165	≥15	≥5	2.37	23	19.63	1.51	1.80	3800	141
LRB1000	11775	1000	334	184	≥15	≥5	2.60	23	21.71	1.67	1.98	4500	171
LRB1100	14248	1100	362	202	≥15	≥5	2.97	24	24.05	1.85	2.26	5000	227
LRB1200	16956	1200	380	220	≥15	≥5	3.22	24	26.26	2.02	2.45	5500	264
LRB1300	19900	1300	414	239	≥15	≥5	3.45	24	28.34	2.18	2.62	6600	304
LRB1400	23079	1400	461	257	≥15	≥5	3.76	24	30.55	2.35	2.86	7500	362
LRB1500	26494	1500	486	276	≥15	≥5	4.05	24	32.63	2.51	3.08	8400	425
Remark	The design bearing capacity of the seismic isolation bearings listed in the table is calculated based on the base surface pressure of 15MPa (Category C). Please convert for other types of buildings.

Second of mechanical properties and specifications of type I lead-core building isolation rubber bearings
Model	Design bearing capacity kN	Effective diameter mm	Support body height mm	Total rubber thickness mm	First shape coefficient S1	Second shape coefficient S2	Horizontal performance value at 100% shear strain				Shear strain 250% horizontal equivalent degree kN/mm	Vertical stiffness kN/mm	Yield force kN
Model	Design bearing capacity kN	Effective diameter mm	Support body height mm	Total rubber thickness mm	First shape coefficient S1	Second shape coefficient S2	Horizontal equivalent stiffness kN/mm	Equivalent damping ratio (Heq)%	Stiffness before yield kN/mm	Stiffness after yield kN/mm	Shear strain 250% horizontal equivalent degree kN/mm	Vertical stiffness kN/mm	Yield force kN
LRB400	1884	400	156	73	≥15	≥5	1.04	23	8.84	0.68	0.79	1450	27
LRB500	2944	500	183	92	≥15	≥5	1.27	23	10.92	0.84	0.97	1850	40
LRB600	4239	600	211	110	≥15	≥5	1.58	23	13.13	1.01	1.20	2200	63
LRB700	5770	700	257	129	≥15	≥5	1.81	23	15.21	1.17	1.38	2700	83
LRB800	7536	800	280	148	≥15	≥5	2.05	23	17.29	1.33	1.56	3100	106
LRB900	9538	900	311	165	≥15	≥5	2.37	23	19.63	1.51	1.80	3800	141
LRB1000	11775	1000	364	184	≥15	≥5	2.60	23	21.71	1.67	1.98	4500	171
LRB1100	14248	1100	382	202	≥15	≥5	2.97	24	24.05	1.85	2.26	5000	227
LRB1200	16956	1200	410	220	≥15	≥5	3.22	24	26.26	2.02	2.45	5500	264
LRB1300	19900	1300	444	239	≥15	≥5	3.45	24	28.34	2.18	2.62	6600	304
LRB1400	23079	1400	501	257	≥15	≥5	3.76	24	30.55	2.35	2.86	7500	362
LRB1500	26494	1500	526	276	≥15	≥5	4.05	24	32.63	2.51	3.08	8400	425
Remark	The design bearing capacity of the seismic isolation bearings listed in the table is calculated based on the base surface pressure of 15MPa (Category C). Please convert for other types of buildings.