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Existing continuous beam bridges seismic vulnerability assessment method considering with model modification based on influence line
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Yu ZHOU1, 2, 3, Luyi GAN1, 4, Shengkui DI2, Dong CHENG1, Dengjia FANG2
Journal of Vibration Engineering | 2025, 38(4) : 838 - 848
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Journal of Vibration Engineering | 2025, 38(4): 838-848
Existing continuous beam bridges seismic vulnerability assessment method considering with model modification based on influence line
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Yu ZHOU1, 2, 3, Luyi GAN1, 4, Shengkui DI2, Dong CHENG1, Dengjia FANG2
Affiliations
  • 1.College of Civil Engineering，Anhui Jianzhu University，Hefei 230601，China
  • 2.School of Civil Engineering，Lanzhou Jiaotong University，Lanzhou 730070，China
  • 3.National-local Joint Engineering Laboratory of Building Health Monitoring and Disaster Prevention Technology，Anhui Jianzhu University，Hefei 230601，China
  • 4.Operation and Monitoring Center for Hefei Urban Safety & Security，Hefei 230601，China
Published: 2025-04-10 doi: 10.16385/j.cnki.issn.1004-4523.2025.04.019
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The influence line is an important parameter of the elastic mechanical state of the bridge structure，which can effectively reflect the resistance and deformation resistance of the structure，and is expected to be used to evaluate and predict the elastic-plastic response during earthquakes. Taking the influence line of a three-span steel plate composite continuous beam bridge as the model correction target，the bridge model correction research is carried out based on BP neural network. With the expectation of Beta distribution as the earthquake damage index，the overtaking probability expression of the bridge model under various performance levels is fitted，and the seismic vulnerability of the continuous beam bridge structure before and after the finite element modification is analyzed and compared. The results show that the relative error between the measured value and the calculated value can be reduced from 38% to less than 10%，and the earthquake damage index of the modified finite element model is lower than that of the initial model. By incorporating the Beta distribution to weight and integrate different performance levels，the structural vulnerability matrix can be transformed into a seismic damage index，thereby accounting for the damage consequences of different failure levels and providing a more comprehensive representation of the seismic performance of the bridge structure.

bridge engineering  /  seismic vulnerability  /  incremental dynamic analysis  /  strain influence line  /  model modification
Yu ZHOU, Luyi GAN, Shengkui DI, Dong CHENG, Dengjia FANG. Existing continuous beam bridges seismic vulnerability assessment method considering with model modification based on influence line[J]. Journal of Vibration Engineering, 2025 , 38 (4) : 838 -848 . DOI: 10.16385/j.cnki.issn.1004-4523.2025.04.019
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Year 2025 volume 38 Issue 4
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.2025.04.019
  • Receive Date：2023-08-07
  • Online Date：2026-02-12
  • Published：2025-04-10
Article Data
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History
  • Received：2023-08-07
  • Revised：2023-09-19
Funding
Affiliations
    1.College of Civil Engineering，Anhui Jianzhu University，Hefei 230601，China
    2.School of Civil Engineering，Lanzhou Jiaotong University，Lanzhou 730070，China
    3.National-local Joint Engineering Laboratory of Building Health Monitoring and Disaster Prevention Technology，Anhui Jianzhu University，Hefei 230601，China
    4.Operation and Monitoring Center for Hefei Urban Safety & Security，Hefei 230601，China
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https://castjournals.cast.org.cn/joweb/zdgcxb/EN/10.16385/j.cnki.issn.1004-4523.2025.04.019
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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