基礎建設 / 鉛心橡膠支承

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鉛心橡膠支承 (LRB)

鉛心橡膠支承由積層橡膠及鉛心組合而成，其中，橡膠具有低水平勁度的特性，可以延長建築物或橋梁的振動週期，進而降低結構物在地震時的加速度；鉛心則提供阻尼的特性，受地震往復作用下變形時，可以吸收地震對結構物所輸入的能量。鉛心橡膠支承結合以上優點，並且經歷了多次地震的考驗，展現出良好的隔震效益及可靠性。

規格

優點

應用

使用材料

尺寸參數表

規格

優點

應用

使用材料

尺寸參數表

			LRBR400 -80-100	LRBR500 -80-100	LRBR600 -100-117	LRBR700 -130-140	LRBR800 -150-156	LRBR900 -200-180
Shear modulus	G	N/mm²	0.3946	0.3946	0.3946	0.3946	0.3946	0.4104
Detail dimension
Outer diameter of bearing	D_r	mm	400	500	600	700	800	900
Diameter of lead	D_i	mm	80	80	100	130	150	200
Thickness of rubber layer	t_r	mm	5	5	4.5	5	6	6
No. of rubber layers	—	layer	20	20	26	28	26	30
Total height of rubber	H_r	mm	100	100	117	140	156	180
1st shape factor	S₁	—	20	25	33.33	35	33.33	37.5
2nd shape factor	S₂	—	4	5	5.13	5	5.13	5
Thickness of shim plate	t_s	mm	3	3	4.5	4.5	4.5	4.5
No. of shim plates	—	layer	19	19	25	27	25	29
Thickness of connection plate	t_cp	mm	20	25	25	30	30	30
Rubber bearing height	H_b	mm	197	207	279.5	321.5	328.5	370.5
Anchor plate
Thickness of anchor plate	tf	mm	20	25	25	30	35	38
Total bearing height	H_tot	mm	237	257	329.5	381.5	398.5	446.5
Diameter of anchor plate	D_f	mm	580	700	800	950	1050	1200
Vertical load
Design load at 12 Mpa (120 kg/cm²)	—	kN	1508	2356	3393	4418	6032	7634
Vertical Characteristics
Compressive strength	σ_C	N/mm²	60	60	60	60	60	60
Vertical design stress	σ_normal	N/mm²	12	12	12	12	12	12
Vertical stiffness	K_v	kN/mm	781	1553	2711	3170	3637	4233
Lateral characteristics
Effective stiffness	K_eff	kN/m	1579	1857	1467	1808	2135	2775
Effective damping ratio	H_eq	%	33.6	28.6	23.4	26.8	27.1	32
Elastic stiffness	K_u	kN/m	8938	12285	11123	12567	14720	16547
Post-elastic stiffness	K_d	kN/m	745	1024	927	1047	1227	1379
Characteristic strength	Q_d	kN	40	40	63	106	142	251

			LRBR1000 -220-198	LRBR1100 -220-224	LRBR1200 -100-117	LRBR1300 -130-140	LRBR1400 -150-156	LRBR1500 -200-180
Shear modulus	G	N/mm²	0.4104	0.4104	0.4262	0.4262	0.4262	0.4262
Detail dimension
Outer diameter of bearing	D_r	mm	1000	1100	1200	1300	1400	1500
Diameter of lead	D_i	mm	220	220	270	270	280	300
Thickness of rubber layer	t_r	mm	6	7	8	8	8	8
No. of rubber layers	—	layer	33	32	31	31	31	38
Total height of rubber	H_r	mm	198	224	248	248	248	304
1st shape factor	S₁	—	41.67	39.29	37.5	40.63	43.75	46.88
2nd shape factor	S₂	—	5.05	4.91	4.84	5.24	5.65	4.93
Thickness of shim plate	t_s	mm	4.5	4.5	4.5	2.5	4.5	4.5
No. of shim plates	—	layer	32	31	30	30	30	37
Thickness of connection plate	t_cp	mm	35	44	44	44	50	50
Rubber bearing height	H_b	mm	412	451.5	471	471	483	570.5
Anchor plate
Thickness of anchor plate	tf	mm	40	50	50	50	50	50
Total bearing height	H_tot	mm	492	551.5	571	571	583	670.5
Diameter of anchor plate	D_f	mm	1350	1400	1500	1600	1750	1850
Vertical load
Design load at 12 Mpa (120 kg/cm²)	—	kN	9425	11404	13572	15928	18473	21206
Vertical Characteristics
Compressive strength	σ_C	N/mm²	60	60	60	60	60	60
Vertical design stress	σ_normal	N/mm²	12	12	12	12	12	12
Vertical stiffness	K_v	kN/mm	4991	5275	5550	6805	8155	7825
Lateral characteristics
Effective stiffness	K_eff	kN/m	3085	3029	3694	4032	4528	4240
Effective damping ratio	H_eq	%	31.7	28.5	31.9	29.2	28	27.9
Elastic stiffness	K_u	kN/m	18590	20058	22142	26191	30476	28541
Post-elastic stiffness	K_d	kN/m	1549	1672	1845	2183	2540	2378
Characteristic strength	Q_d	kN	304	304	459	459	493	566