Seismic Isolator Lead Rubber Bearing Lrb for Bridge and Building

Product Description

Product Description

Lead Rubber Bearing

This kind product includes:Elstomeric Seismic protection isolator for bridges and buildings.It can absorb earthquake energy effectively by way of rubber's elasticity and Lead's restorability. Products comply with :JT/T822-2011 Lead rubber bearing isolator for highway bridge and GB 20688.3-2006 Elastomeric seimic protection isolator for buildings And BS:EN1337.
Lead Bridge Bearing Features:
◊ Stiff and strong in vertical direction but flexible in horizontal direction.
◊ Absorb earthquake-generated force by changing the bearing's shape.
◊ Allow the buildings to retain their original shapes and position owing to the high elastic force of rubber.
◊ Capable to adjust damping amount just by changing the number of lead plugs.
◊ Excellent vertical load capacity ranging from 5 tonf to 2000 tonf.
◊ Reduce the ground acceleration by extending the structure vibration period.
◊ High durable and elasticity of the rubber part - not suffer any damages during and after earthquake.
◊ Easy to install without a separated damper.
◊ Low maintenance.
◊ With stable bi-linear behavior shown as the above picture.
Lead Bridge Bearing Classification of Seismic isolation device:
Lead rubber bearing (LRB) is made of load bearing laminated rubber used of support function, steel and lead core combination that used to improve the initial stiffness and dissipation of shock energy absorption. The LRB is popular all over the world for its excellent performance and broad applicability.
 

Product Parameters

 

Specifications of lead core isolation rubber bearings
Model	Bearing capacity(KN)	Effective diameter(mm)	Support body height(mm)	Rubber thickness	First shape coefficent S1	Second shape coefficent S2	Horizontal performance value at 100% shear strain				Shear Strain 250% Horizontal equivalent Degree KN/mm	Vertical Stiffness KN/mm	Yeild force (KN)
							Horizontal equivalent stiffness KN/mm	equivalent  damping ratio %	Stiffness Before yield KN/mm	Stiffness After yield KN/mm
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	1.84	0.97	1480	40
LRB600	4239	600	201	110	≥15	≥5	1.58	23	13.13	1.01	1.2	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	1.8	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

 

Detailed Photos