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Frontiers of Structural and Civil Engineering

ISSN 2095-2430

ISSN 2095-2449(Online)

CN 10-1023/X

Postal Subscription Code 80-968

2018 Impact Factor: 1.272

Front. Struct. Civ. Eng.    2023, Vol. 17 Issue (2) : 205-223    https://doi.org/10.1007/s11709-022-0909-y
RESEARCH ARTICLE
Machine learning-based seismic assessment of framed structures with soil-structure interaction
Mohamed NOURELDIN, Tabish ALI, Jinkoo KIM()
Department of Global Smart City, Sungkyunkwan University, Suwon 16419, Korea
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Abstract

The objective of the current study is to propose an expert system framework based on a supervised machine learning technique (MLT) to predict the seismic performance of low- to mid-rise frame structures considering soil-structure interaction (SSI). The methodology of the framework is based on examining different MLTs to obtain the highest possible accuracy for prediction. Within the MLT, a sensitivity analysis was conducted on the main SSI parameters to select the most effective input parameters. Multiple limit state criteria were used for the seismic evaluation within the process. A new global seismic assessment ratio was introduced that considers both serviceability and strength aspects by utilizing three different engineering demand parameters (EDPs). The proposed framework is novel because it enables the designer to seismically assess the structure, while simultaneously considering different EDPs and multiple limit states. Moreover, the framework provides recommendations for building component design based on the newly introduced global seismic assessment ratio, which considers different levels of seismic hazards. The proposed framework was validated through comparison using non-linear time history (NLTH) analysis. The results show that the proposed framework provides more accurate results than conventional methods. Finally, the generalization potential of the proposed framework was tested by investigating two different types of structural irregularities, namely, stiffness and mass irregularities. The results from the framework were in good agreement with the NLTH analysis results for the selected case studies, and peak ground acceleration (PGA) was found to be the most influential input parameter in the assessment process for the case study models investigated. The proposed framework shows high generalization potential for low- to mid-rise structures.

Keywords seismic hazard      artificial neural network      soil-structure interaction      seismic analysis     
Corresponding Author(s): Jinkoo KIM   
Just Accepted Date: 25 November 2022   Online First Date: 03 February 2023    Issue Date: 03 April 2023
 Cite this article:   
Mohamed NOURELDIN,Tabish ALI,Jinkoo KIM. Machine learning-based seismic assessment of framed structures with soil-structure interaction[J]. Front. Struct. Civ. Eng., 2023, 17(2): 205-223.
 URL:  
https://academic.hep.com.cn/fsce/EN/10.1007/s11709-022-0909-y
https://academic.hep.com.cn/fsce/EN/Y2023/V17/I2/205
Fig.1  Flowchart of the proposed framework.
itemmodelstandard section
beams3 and 5-storyW33 × 118
9-storyW12 × 53
columns3-story(1?3 story) W14 × 257
5-story(1?2 story) W14 × 311
(2?5 story) W14 × 257
9-story(1?2 story) W18 × 130
(3?5 story) W14 × 90
(6?7 story) W14 × 61
(8?9 story) W14 × 48
Tab.1  Section properties and element details of model structures
Fig.2  Configuration of the analysis model frames: (a) plan view; (b) 3-story frame elevation with SSI Model.
itemlimit/ EQ namePGA (g)magnitude (Mw)source to site distance (km)Vs30 (m/s)lowest useable frequency (Hz)source-fault mechanism
limits of parametersupper1.8007.62218.1314283.750normal; reverse: reverse oblique; strike slip
lower0.0174.200.56169.80.025
earthquake samples*“NW Calif-03”0.3015.8053.73219.30.500strike slip
“Cent. Calif-01”0.3405.3025.81198.70.375strike slip
“Parkfield”0.3706.1963.34493.50.625strike slip
“San Fernando”0.5796.6122.77316.40.100reverse
“San Fernando”0.6446.6135.54529.00.250reverse
Tab.2  Parameters of input earthquake records
Fig.3  Input earthquakes used for the framework: (a) response spectra of 100 input earthquakes; (b) histogram of the PGA.
probability of exceedance in 50 yearssequence numberearthquake namePGA (g)magnitudefault typesource distance (km)scale factor
10%1“Imperial Valley-02”0.596.95strike slip6.092.09
2“Kern County”0.617.36reverse38.423.82
3“Northern Calif-03”0.386.5strike slip26.722.33
4“Parkfield”1.266.19strike slip9.582.76
5“Parkfield”1.576.19strike slip15.964.34
6“Borrego Mtn”0.526.63strike slip45.123.91
7“San Fernando”0.606.61reverse22.772.57
8“San Fernando”0.756.61reverse22.234.96
9“San Fernando”0.576.61reverse24.164.98
10“Managua Nicaragua-1”0.896.24strike slip3.512.38
11“Managua Nicaragua-2”0.775.2strike slip4.332.94
2%12“Imperial Valley-02”1.0096.95strike slip6.093.5903
13“Kern County”1.0437.36reverse38.426.5615
14“Northern Calif-03”0.6556.5strike slip26.724.0082
15“Parkfield”2.1076.19strike slip9.584.7448
16“Borrego Mtn”0.8906.63strike slip45.126.7084
17“San Fernando”0.9936.61reverse22.774.4173
18“San Fernando”1.2896.61reverse22.238.5081
19“San Fernando”1.5866.61reverse01.2998
20“San Fernando”0.9586.61reverse24.168.5419
21“Managua Nicaragua-1”1.5226.24strike slip3.514.0902
22“Managua Nicaragua-2”1.3295.2strike slip4.335.0514
Tab.3  List of the earthquake records used in the nonlinear dynamic analyses
Fig.4  Response spectra of the 11 earthquakes and the target spectrum for seismic hazards with probability of exceedance in 50 years of: (a) 10%; (b) 2%.
Fig.5  Sensitivity of EDPs to PGA, elastic modulus (Eso), and Poisson’s ratios (nu): (a) V; (b) D; (c) A.
Fig.6  Normalized V in the 3-story building (1200 samples).
Fig.7  Accuracy of different MLTs for the output EDPs.
Fig.8  Effect of training algorithm on: (a) MSE; (b) R.
Fig.9  Effect of number of hidden layers on: (a) MSE; (b) R.
Fig.10  Effect of number of neurons on: (a) MSE; (b) R.
Fig.11  Effect of activation function on: (a) MSE; (b) R.
Fig.12  Accuracy of the ANN in the example structures: (a) R plot of V in 3-story model; (b) R plot of V in 5-story model; (c) R plot of V in 9-story model; (d) error histogram of D.
Fig.13  Validation of the MLT results using NLTH analysis results: (a) V; (b) A; (c) D.
Fig.14  Comparison of the MLT with the ASCE and NLTH results: (a) V; (b) D.
Fig.15  Irregular framed structures: (a) 3-story with mass irregularity; (b) 4-story with stiffness irregularity.
Fig.16  Results of the mass irregular 3-story model obtained from NLTH analysis and the proposed MLT for the DBE and MCE level earthquakes: (a) V; (b) A; (c) D.
Fig.17  Results of the stiffness irregular 4-story model obtained from NLTH analysis and the proposed MLT using 5 different earthquake records: (a) V; (b) A; (a) D.
modellimit state/EQ level(FV)VavgVlim(FA)AavgAlim(FD)DavgDlimglobal seismic assessment ratios (G)seismic performance classifications
regular 3-storylife safety (DBE)(1/3) 0.43(1/3) 0.40(1/3) 0.650.51moderate
collapse prevention (MCE)(1/3) 0.6(1/3) 0.65(1/3) 0.520.41poor
mass-irregular 3-storylife safety (DBE)(0.1) 0.38(0.8) 0.67(0.1) 0.600.36poor
collapse prevention (MCE)(0.1) 0.67(0.8) 0.96(0.1) 0.430.12not acceptable
stiffness-irregular 4-storyselected(0.1) 0.59(0.1) 0.58(0.8) 0.550.44poor
Tab.4  Global seismic assessment ratio (G)
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