Damage assessment of a reinforced concrete frame structure subjected to mainshock-aftershock sequences

被引：0
作者：
Yu X. [1 ,2 ,3 ]
Dai K. [1 ,2 ]
Zhou Z. [1 ,2 ]
Lü D. [1 ,2 ]
Ma F. [1 ,2 ,4 ]
机构：
[1] Key Lab of Structures Dynamic Behavior and Control of China Ministry of Education, Harbin Institute of Technology, Harbin
[2] Key Lab of Smart Prevention and Mitigation of Civil Engineering Disaster of China Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin
[3] Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning
[4] The Architectural Design and Research Institute of Henan Province Co., Ltd, Zhengzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷 / 03期
关键词：
Incremental damage; Mainshock-aftershock sequence; Modified Park-Ang damage index; RC frame structure;
D O I：
10.14006/j.jzjgxb.2019.03.013
中图分类号：
学科分类号：
摘要：
A strong earthquake commonly triggers the occurrence of multiple aftershocks. Since the time interval between mainshock and aftershock is very short, the mainshock-damaged structure cannot be repaired in time and could suffer further damage during aftershocks. A five-story RC frame structure was designed according to the current codes is used as a case study. The cumulative damages of structures subjected to earthquake sequences and the aftershock-induced incremental damages were investigated. A suite of 75 actual mainshock-aftershock sequences was formulated as earthquake inputs. Concurrently, the actual mainshock records were used as seeds to generate two sets of artificial mainshock-aftershock sequences using repeated method and randomized method. The modified Park-Ang damage index was used as the measures of structural damages caused by the actual and artificial mainshock-aftershock sequences. The aftershock-induced incremental damage in terms of the modified Park-Ang damage index was also assessed. The intensity measures of peak ground acceleration, spectral acceleration and Arias intensity, were further used as the indicators of mainshock and aftershock intensities. Then the correlation between the aftershock-to-mainshock intensity ratio and the aftershock-induced incremental damages was investigated. The results show that the artificial mainshock-aftershock sequences using the randomized method can cause the most significant incremental damages in comparison with the actual ones and those generated by the repeated method. The aftershock-to-mainshock intensity ratio can predict the significance of the aftershock-induced incremental damage with considerable confidence. © 2019, Editorial Office of Journal of Building Structures. All right reserved.
引用
收藏
页码：127 / 133
页数：6
相关论文
共 19 条
  • [1] Ogata Y., Statistical models for earthquake occurrences and residual analysis for point processes, Journal of the American Statistical Association, 83, 401, pp. 9-27, (1988)
  • [2] Dong C., Luo M., Chang X., Et al., Spatial location behavior of aftershocks of Wenchuan MS8.0 and Lushan MS7.0 earthquakes, Acta Seismologica Sinica, 37, 1, pp. 113-124, (2015)
  • [3] Shao Z., Ma H., Zhang L., Et al., The characteristics of co-seismic slip and aftershocks distribution of the MS7.1 earthquake at Qinghai Yushu in 2010 and its relationship with tectonics, Chinese Journal of Geophysics, 56, 11, pp. 3800-3810, (2013)
  • [4] Kam W.Y., Pampanin S., Elwood K., Seismic performance of reinforced concrete buildings in the 22 February Christchurch (Lyttleton) earthquake, Bulletin of the New Zealand Society for Earthquake Engineering, 44, 4, pp. 239-277, (2011)
  • [5] Sunasaka Y., Kiremidjian A.S., A method for structural safety evaluation under mainshock-aftershock earthquake sequences, (1993)
  • [6] Wu B., Ou J., A practical method for structural aseismic design taking account of the influence of aftershocks, Journal of Harbin Architecture and Civil Engineering Institute, 27, 4, pp. 9-15, (1994)
  • [7] Hatzigeorgiou G.D., Liolios A.A., Nonlinear behavior of RC frames under repeated strong ground motions, Soil Dynamics and Earthquake Engineering, 30, 10, pp. 1010-1025, (2010)
  • [8] Fragiacomo M., Amadio C., Macorini L., Seismic response of steel frames under repeated earthquake ground motions, Engineering Structures, 26, 13, pp. 2021-2035, (2006)
  • [9] Goda K., Salami M.R., Inelastic seismic demand estimation of wood-frame houses subjected tomainshock-aftershock sequences, Bulletin of Earthquake Engineering, 12, 2, pp. 855-874, (2014)
  • [10] Zhai C.H., Wen W.P., Li S., Et al., The damage investigation of inelastic SDOF structure under the mainshock-aftershock sequence-type ground motions, Soil Dynamics and Earthquake Engineering, 59, pp. 30-41, (2014)
12