[1]DENG Xisheng,ZHOU Zijuan,LAI Xinyue,et al.Vulnerability Analysis of the RC Framework Structure Subjected to the Mainshock-aftershock Sequence Based on BP Neural Network[J].Journal of Seismological Research,2025,(03):496-506.[doi:10.20015/j.cnki.ISSN1000-0666.2025.0052
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Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
Number of periods:
2025 03
Page number:
496-506
Column:
Public date:
2025-04-15
- Title:
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Vulnerability Analysis of the RC Framework Structure Subjected to the Mainshock-aftershock Sequence Based on BP Neural Network
- Author(s):
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DENG Xisheng1; ZHOU Zijuan1; LAI Xinyue2; LIN Jiacong3; ZHU Yilin1
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(1.School of Civil Engineering and Geomatics,Southwest Petroleum University,Chengdu 610500,Sichuan,China)(2.School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China)(3.Fujian No.1 Construction Group Co.,Ltd.,Sanming 365001,Fujian,China)
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- Keywords:
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mainshock-aftershocks; duration; BP neural networks; RC frame structure; fragility surface
- CLC:
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P315.92
- DOI:
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10.20015/j.cnki.ISSN1000-0666.2025.0052
- Abstract:
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In order to study the vulnerability of the RC frame structure under the action of the mainshock-aftershock earthquake sequence,we design a 6-layer RC frame structure.By selecting recordings of the ground motion of the mainshock-aftershock sequence containing aftershocks with different durations,we respectively synthesize 20 sets of mainshock-aftershock sequence containing long-duration aftershocks and 20 sets of mainshock-aftershock sequence containing short-duration aftershocks.We select the intensity index of the ground motion IM as the predictive variable,and input all the ground motions of the 40 sets of mainshock-aftershock sequence into the structure for IDA analysis.Then we take the IDA analysis results as the neural network database to train the best BP neural network model.Thus,we get the vulnerable surface of the BP neural network.On this basis we obtain the relationship between the IM and the maximum interlayer displacement angle of the structure.We find that the mainshock-aftershock sequences containing long-duration aftershocks impacts the structure greater than the ones containing short-duration aftershocks.The vulnerability function based on BP neural network can better reveal the damage to the structure.