考虑行波效应的在役连续梁桥抗震性能提升

doi:10.13229/j.cnki.jdxbgxb.20250162

Abstract

Abstract:

To study the improvement effect of different seismic reinforcement methods on the seismic performance of service beam bridges， the seismic performance of piers and bearings of bridges during frequent ground motion， rare ground motion and very rare ground motion is evaluated based on the vulnerability analysis method of incremental dynamic analysis（IDA）. Three seismic reinforcement methods have been designed for engineering comparison， including wrapping fiber reinforced polymer（FRP）materials around piers， installing metal dampers， and installing cable restrainer. The finite element dynamic analysis model of the whole bridge was established with the help of OpenSees platform. Considering the uncertainty of ground motion and traveling wave effects， 130 ground motions were selected for IDA to obtain IDA curve clusters of uniform excitation and non-uniform excitation ground motion. Based on the capacity-demand ratio model， the curvature and displacement are used as damage measures to define the seismic damage states of piers and bearings respectively， and the seismic vulnerability curves are plotted to conduct a vulnerability comparison analysis of the seismic performance of bridges under different seismic strengthening methods. The research results show that： wrapping FRP materials has a significant effect on improving the seismic performance of bridge piers. After adopting the FRP reinforcement scheme， the probability of pier being slightly damaged under very rare ground motion can be reduced by 53.73%； The installation of metal dampers can effectively control the degree of bearing damage. Under major earthquake， the probability of the bearing exceeding a slight damage state after shock absorption is only 13.57%， and the bearing is likely to be in intact state； The installation of cable restrainer has little benefit in improving the seismic performance of bridges； Considering the traveling wave effect will reduce the damage exceeding probability of the pier， Compared with the damage exceeding probability of the pier under uniform excitation ground motion， before and after adopting FPR seismic reinforcement measures， the reduction amplitude of damage exceeding probability under non-uniform excitation ground motion of the pier is 19.88% and 22.07%， respectively. The traveling wave effect has little effect on the damage exceeding probability of the bearing.

Key words: bridge engineering, seismic reinforcement, FRP strengthened, metal dampers, cable restrainer, vulnerability analysis

CLC Number:

Ze-liang GAO,Xiao-ming WANG,Bing-yu WANG,Yi-zhe SHI,He ZHANG,Qian WU. Improving seismic performance of in-service continuous beam bridges considering traveling wave effect[J].Journal of Jilin University(Engineering and Technology Edition), 2026, 56(9): 2382-2394.

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损伤状态	原桥桥墩/（m^-1）		FRP加固桥墩/（m^-1）		滑动支座/mm		固定支座/mm
损伤状态	顺桥向	横桥向	顺桥向	横桥向	顺桥向	横桥向	顺桥向	横桥向
轻微损伤	0.001 84	0.001 85	0.005 99	0.005 98	90	40	48	48
中等损伤	0.014 48	0.014 45	0.018 95	0.018 98	135	60	72	72
严重损伤	0.021 35	0.021 31	0.079 05	0.079 02	180	80	96	96
完全破坏	0.023 30	0.023 26	0.107 15	0.107 13	225	100	120	120

序号	地震事件	时间/年份	记录台站	震级	PGA/g
1	Humbolt Bay	1937	Ferndale City Hall	5.8	0.036
2	Imperial Valley?01	1938	El Centro Array #9	5	0.015
3	Northwest Calif?02	1941	Ferndale City Hall	6.6	0.063
4	Borrego	1942	El Centro Array #9	6.5	0.066
5	Kern County	1952	Pasadena?CIT Athenaeum	7.36	0.048
6	Southern Calif	1952	San Luis Obispo	6	0.036
7	Northern Calif?04	1960	Ferndale City Hall	5.7	0.078
8	Parkfield	1966	San Luis Obispo	6.19	0.012
9	Lytle Creek	1970	Castaic?Old Ridge Route	5.33	0.020
10	San Fernando	1971	Anza Post Office	6.61	0.027
11	San Fernando	1971	Colton?So Cal Edison	6.61	0.032
12	San Fernando	1971	Hemet Fire Station	6.61	0.037
13	San Fernando	1971	Wheeler Ridge?Ground	6.61	0.026

损伤状态	PGA/g	D2号桥墩				D4号桥墩				D13桥墩
损伤状态	PGA/g	原桥	FRP加固	阻尼减震	拉索限位	原桥	FRP加固	阻尼减震	拉索限位	原桥	FRP加固	阻尼减震	拉索限位
轻微损伤	0.1	0.95	0	0.24	0.54	3.42	0	4.00	2.13	0.28	0	0.26	0.07
	0.2	13.47	0.08	10.44	10.23	21.28	0.39	29.02	17.71	2.89	0	6.92	1.56
	0.4	57.00	5.00	58.25	54.41	63.29	10.71	74.69	62.51	25.86	0.77	43.32	22.00
	0.6	82.74	20.49	84.62	83.22	85.45	31.72	91.72	86.74	60.23	6.48	72.54	57.81
	1.0	97.32	55.95	97.70	98.14	97.79	66.51	98.94	98.56	94.37	36.70	94.11	94.37
中等损伤	0.1	0	0	0	0	0.02	0	0	0	0	0	0	0
	0.2	0.03	0	0	0.01	0.49	0	0.20	0.18	0	0	0	0
	0.4	1.47	0.05	0.24	0.66	7.40	0.37	4.86	4.72	0.25	0	0.44	0.06
	0.6	7.90	0.68	2.23	5.20	23.25	2.77	17.44	19.02	2.84	0.11	3.19	1.11
	1.0	33.53	6.75	15.07	30.71	58.95	15.54	49.28	57.72	28.16	2.96	18.73	18.48
严重损伤	0.1	0	0	0	0	0	0	0	0	0	0	0	0
	0.2	0	0	0	0	0.17	0	0.05	0.05	0	0	0	0
	0.4	0.44	0	0.04	0.15	3.72	0	1.80	2.03	0.06	0	0.10	0.01
	0.6	3.20	0	0.50	1.74	14.29	0.01	8.46	10.51	1.03	0	1.01	0.29
	1.0	19.33	0.02	5.48	16.15	45.59	0.26	32.41	42.83	16.18	0.01	8.75	8.58
完全破坏	0.1	0	0	0	0	0	0	0	0	0	0	0	0
	0.2	0	0	0	0	0.14	0	0.03	0.04	0	0	0	0
	0.4	0.33	0	0.02	0.11	3.15	0	1.41	1.65	0.05	0	0.07	0.01
	0.6	2.55	0	0.34	1.32	12.64	0	7.03	9.05	0.80	0	0.77	0.21
	1.0	16.71	0	4.20	13.62	42.60	0.07	28.94	39.53	14.01	0	7.23	7.03

极限状态	PGA/g	滑动支座				固定支座
极限状态	PGA/g	原桥	FRP加固	阻尼减震	拉索限位	原桥	FRP加固	阻尼减震	拉索限位
轻微损伤	0.1	6.16	5.98	0	3.72	0.12	0.14	0	0.05
	0.2	51.37	49.14	0	47.55	17.04	16.09	0	13.87
	0.4	94.24	93.44	0.04	94.43	81.37	80.11	0	80.42
	0.6	99.31	99.19	0.77	99.43	96.86	96.72	0	96.89
	1.0	99.98	99.98	13.57	99.99	99.85	99.87	0	99.86
中等损伤	0.1	0.55	0.54	0	0.20	0	0	0	0
	0.2	16.65	15.55	0	12.53	1.14	1.08	0	0.56
	0.4	71.67	69.78	0	69.31	33.23	32.19	0	27.72
	0.6	92.76	92.10	0.1	92.51	70.40	70.31	0	66.16
	1.0	99.47	99.44	3.74	99.51	94.98	95.59	0	93.96
严重损伤	0.1	0.06	0.06	0	0.01	0	0	0	0
	0.2	4.66	4.30	0	2.74	0.06	0.06	0	0.02
	0.4	44.50	42.65	0	39.47	8.48	8.22	0	5.28
	0.6	77.24	76.07	0.02	74.81	34.30	34.66	0	27.07
	1.0	96.75	96.66	1.18	96.51	75.88	78.16	0	70.00
完全破坏	0.1	0.01	0.01	0	0	0	0	0	0
	0.2	1.29	1.19	0	0.59	0	0	0	0
	0.4	24.52	23.24	0	19.34	1.77	1.74	0	0.79
	0.6	57.74	56.47	0	52.78	12.85	13.26	0	7.96
	1.0	90.20	90.10	0.42	88.77	48.93	52.30	0	39.26

损伤状态	PGA/g 激励方式	D4号桥墩				滑动支座				固定支座
		原桥		FRP加固		原桥		FRP加固		原桥		FRP加固
		一致	多点	一致	多点	一致	多点	一致	多点	一致	多点	一致	多点
轻微损伤	0.1	3.72	0.93	0.03	0	5.05	6.16	4.59	5.94	0	0	0	0
	0.2	13.80	5.11	0.65	0.07	20.95	20.43	20.50	20.10	0.10	0.11	0.08	0.15
	0.4	41.38	23.26	6.66	1.54	54.86	47.94	54.68	47.92	14.57	12.26	13.81	13.74
	0.6	64.57	45.39	18.28	6.13	76.17	66.61	75.95	66.89	50.24	43.88	50.61	46.69
	1.0	88.59	77.28	44.81	22.74	93.35	85.63	93.09	86.08	88.74	84.16	90.43	86.35
中等损伤	0.1	0.02	0	0	0	1.24	2.08	1.09	1.98	0	0	0	0
	0.2	0.26	0.01	0.01	0	7.88	9.28	7.64	9.08	0	0	0	0
	0.4	2.70	0.33	0.39	0.03	31.46	29.16	31.25	29.11	0.37	0.46	0.31	0.62
	0.6	9.08	1.78	1.93	0.23	54.25	47.29	53.92	47.56	5.30	5.56	5.11	6.78
	1.0	30.69	10.81	9.79	2.06	81.53	71.46	80.97	72.11	34.11	33.07	36.57	37.71
严重损伤	0.1	0.01	0	0	0	0.37	0.84	0.32	0.79	0	0	0	0
	0.2	0.09	0	0	0	3.27	4.68	3.14	4.56	0	0	0	0
	0.4	1.22	0.1	0	0	18.08	18.36	17.91	18.31	0.01	0.01	0	0.02
	0.6	4.86	0.67	0.02	0	37.35	33.70	37.01	33.92	0.28	0.45	0.25	0.63
	1.0	20.40	5.36	0.32	0.01	68.02	58.48	67.24	59.20	5.93	7.23	6.50	9.46
完全破坏	0.1	0.01	0	0	0	0.13	0.39	0.11	0.36	0	0	0	0
	0.2	0.07	0	0	0	1.48	2.56	1.41	2.48	0	0	0	0
	0.4	1.01	0.08	0	0	10.65	12.00	10.52	11.94	0	0	0	0
	0.6	4.17	0.52	0.01	0	25.61	24.37	25.29	24.55	0.01	0.03	0.01	0.05
	1.0	18.41	4.50	0.12	0	55.38	47.63	54.49	48.35	0.71	1.22	0.77	1.84

Improving seismic performance of in-service continuous beam bridges considering traveling wave effect

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