Incremental damage analysis of nonlinear single-degree-freedom systems subjected to mainshock-aftershock earthquake sequences

被引：0
作者：
Yu X.-H. [1 ,2 ,3 ]
Qiao Y.-M. [2 ,3 ]
Dai K.-Y. [2 ,3 ]
Tao J. [2 ,3 ]
Lu D.-G. [2 ,3 ]
机构：
[1] Institute of Engineering Mechanics, China Earthquake Administration, Key Laboratory of Earthquake Engineering and Engineering Vibration, Harbin
[2] Key Lab of Structure Dynamic Behavior and Control of China Ministry of Education, Harbin Institute of Technology, Harbin
[3] Key Lab of Smart Prevention and Mitigation of Civil Engineering Disaster of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin
来源：
Gongcheng Lixue/Engineering Mechanics | 2019年 / 36卷 / 03期
关键词：
Attenuated method; Incremental damages; Mainshock-aftershock sequences; Randomized method; Repeated method; SDOF systems;
D O I：
10.6052/j.issn.1000-4750.2017.12.0941
中图分类号：
学科分类号：
摘要：
The incremental damage of nonlinear single-degree-of-freedom (SDOF) systems subjected to real and artificial mainshock-aftershock (MA) sequences is evaluated. A suite of 75 real mainshock-aftershock sequences is selected. Based on the same mainshock records, different methods including the repeated method, the randomized method and the attenuated method are also adopted to generate artificial MA sequences as earthquake inputs. The nonlinear responses of the SDOF systems due to earthquake sequences are calculated considering different hysteretic models, including the elastic-plastic model, the bilinear model considering the post-yielding hardening, and the trilinear model. The modified Park-Ang damage index is used as a structural damage index, and the structural cumulative damages and the incremental damages due to MA sequences are examined by considering the effects of different strength reduction factors, different hysteretic models and different MA sequences. The results show that the aftershock-induced incremental damages of structures cannot be neglected. The aftershock records from the artificial MA sequences generated by the repeated method and the randomized method have stronger intensities than that from the real MA sequences. This may cause the overestimation of the incremental damage of structures due to aftershock. However, the intensities of the aftershock records for the artificial MA sequences generated by the attenuated method are smaller than that of the real MA sequences, which may lead to an underestimation of the incremental damage of structures due to aftershock. The characteristics of structural systems have ignorable effects on aftershock-induced incremental damage since the effects of strength reduction factors and hysteretic models on the incremental damage of structures are not significant. © 2019, Engineering Mechanics Press. All right reserved.
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页码：121 / 130
页数：9
相关论文
共 16 条
[1]  
Mahin S.A., Effects of duration and aftershocks on inelastic design earthquakes, Proceedings of the seventh world conference on earthquake engineering, 5, pp. 677-679, (1980)
[2]  
Sunasaka Y., Kiremidjian A.S., Toki K., Strength demand spectra with uniform damage level in lifetime of structure, Journal of Structural Engineering A, 48, pp. 523-530, (2002)
[3]  
Aschheim M., Black E., Effects of prior earthquake damage on response of simple stiffness-degrading structures, Earthquake Spectra, 15, 1, pp. 1-24, (1999)
[4]  
Amadio C., The effects of repeated earthquake ground motions on the non-linear response of SDOF systems, Earthquake Engineering & Structural Dynamics, 32, 2, pp. 291-308, (2003)
[5]  
Hatzigeorgiou G.D., Beskos D.E., Inelastic displacement ratios for SDOF structures subjected to repeated earthquakes, Engineering Structures, 31, 11, pp. 2744-2755, (2009)
[6]  
Hatzigeorgiou G.D., Ductility demand spectra for multiple near-and far-fault earthquakes, Soil Dynamics & Earthquake Engineering, 30, 4, pp. 170-183, (2010)
[7]  
Hatzigeorgiou G.D., Behavior factors for nonlinear structures subjected to multiple near-fault earthquakes, Computers & Structures, 88, 5-6, pp. 309-321, (2010)
[8]  
Zhai C.H., Wen W.P., Chen Z.Q., Et al., Damage spectra for the mainshock-aftershock sequence-type ground motions, Soil Dynamics & Earthquake Engineering, 45, 1, pp. 1-12, (2013)
[9]  
Yu X., Lu D., Xiao H., Incremental damage spectra of mainshock-aftershock sequence-type ground motions, Engineering Mechanics, 34, 3, pp. 47-53, (2017)
[10]  
Goda K., Taylor C.A., Effects of aftershocks on peak ductility demand due to strong ground motion records from shallow crustal earthquakes, Earthquake Engineering & Structural Dynamics, 41, 15, pp. 2311-2330, (2012)
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