Seismic Capacity Survey and Earthquake Risk Assessment of Self-built Buildings in Rural Areas of Shanghai Municipality

Abstract

Self-built buildings in rural areas exhibit varying levels of seismic performance, and despite the transformative development in the region over the past decades, such buildings continue to exist in Shanghai Municipality. This study conducted field research and theoretical calculations to gain an overall understanding of the seismic performance of these buildings. In this study, 819 self-built buildings were classified according to their age, field research was conducted to test mortar strength and connection reliability, and the seismic performance of these buildings was analyzed. The results confirm that a considerable stock of unreinforced masonry buildings constructed in the peri-urban townships of Shanghai, especially those erected prior to 1990, exhibit markedly deficient seismic performance and are highly vulnerable to collapse or severe damage from earthquakes. This poses a significant threat to catastrophic casualties and disproportionate economic losses. Consequently, a systematic, high-resolution survey coupled with targeted seismic retrofitting is urgently required to mitigate earthquake-induced disaster risks in building inventories.

Keywords

Field investigation / Fragility matrix / Risk assessment / Rural buildings / Seismic capacity

References

[1] Betti M, Galano L, Vignoli A. D’Amico S. Finite element modelling for seismic assessment of historic masonry buildings. Earthquakes and their impact on society, 2015. Cham, Springer: 377-415

[2] Borah B, Kaushik HB, Singhal V. Seismic force distribution in members of confined masonry buildings. Engineering Structures, 2022, 266: Article 114605.

[3] Brzev S, Yakub A, Choudhury J. Seismic vulnerability of unreinforced masonry housing in developing countries. Natural Hazards, 2017, 87(2): 789-805

[4] Cao JF, Liu QZ, Ye XG, Wang Y. Investigation and research for anti-seismic performance of rural buildings in the northeast of Anhui Province. Technology for Earthquake Disaster Prevention, 2011, 6(2): 136-145

[5] Chen B, Li F, Xiong J, Wen M, Liu Y. Seismic performance and risk assessment of traditional brick-wood rural buildings based on numerical simulation. Advances in Civil Engineering, 2021, 2021: Article 7648989.

[6] China Earthquake Administration. 2011. Post-earthquake field works–Part 4: Assessment of direct loss. Beijing: standardization administration, general administration of quality supervision, inspection and quarantine of the People’s Republic of China (in Chinese).

[7] Del Gaudio C, De Martino G, Di Ludovico M, Manfredi G, Prota A, Ricci P, Verderame GM. Empirical fragility curves for masonry buildings after the 2009 L’Aquila, Italy, earthquake. Bulletin of Earthquake Engineering, 2019, 17(10): 6301-6330.

[8] General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, and Standardization Administration of China. 2014. Code for earthquake loss estimation and its information management system. GB/T 19428-2014. Beijing: China Standards Press (in Chinese).

[9] Huang C, Qiu J, Huang TM. Mode selection of post-earthquake recovery and reconstruction of traditional villages using dependency analytic process: taking Xiluobuzi village in the 2022 M6.8 luding earthquake as an example. Frontiers in Public Health, 2023, 11: Article 1240573.

[10] Ibrar M, Naseer A, Ashraf M, Badshah E, Ullah S. Evaluation of confined masonry walls with varying sizes of confining elements and reinforcement ratios against cyclic loading. Journal of Building Engineering, 2022, 50: Article 104094.

[11] Jiang S, Chen F, Li J. Shear strength assessment of low-strength mortar masonry in eastern China rural buildings. Advances in Structural Engineering, 2022, 25(10): 2210-2225

[12] Liu X, Liu Z, Liu L, Ma X, Liu J, Guan H, Zuo L. Features and seismic capacity evaluation of rural houses in Zhangjiakou area. Journal of Seismological Research, 2019, 42(2): 158-165

[13] Ma, Z.J., and H.F. Li. 1990. Natural disaster assessment, disaster degree, and countermeasures. In: Proceedings of the National Symposium on Natural Disaster Reduction, 11–19. Beijing: Chinese Science and Technology Press (in Chinese).

[14] Marques R, Paulo BL. Structural behaviour and design rules of confined masonry walls: review and proposals. Construction and Building Materials, 2019, 217: 137-155.

[15] Miao C, Ding M. Determining acceptable risk levels in earthquake disasters: insights from Chinese mainland. Bulletin of Earthquake Engineering, 2024, 22: 4897-4916.

[16] Ministry of Housing and Urban-Rural Development of the People’s Republic of China, and State Administration for Market Regulation. 2021. General code for masonry structures. GB 55007-2021. Beijing: China Architecture & Building Press (in Chinese).

[17] Pan P, Lam A, Lin X, Li Y, Ye L. Cyclic loading tests and finite element analyses on performance of ring beam connections. Engineering Structures, 2013, 56: 682-690.

[18] Saadat S, Camp CV, Pezeshk S. Seismic performance-based design optimization considering direct economic loss and direct social loss. Engineering Structures, 2014, 76: 193-201.

[19] Shanghai Institute of Disaster Prevention and Relief, and Shanghai Geotechnical Engineering Testing Center. 2019. Technical code for urban disaster loss assessment. DGJ-2019. Draft for comment. Shanghai: Shanghai Municipal Commission of Housing and Urban-Rural Development (in Chinese).

[20] Sims, K., A. Reith, E. Bright, J. Kaufman, J. Pyle, J. Epting, J. Gonzales, and D. Adams. 2023. LandScan Global 2022. Data set. Oak Ridge, TN: Oak Ridge National Laboratory.

[21] Sun B, Hu S. A method for earthquake damage prediction of building group based on existing earthquake damage matrix. Journal of Earthquake Engineering and Engineering Vibration, 2005, 4(6): 102-108

[22] Sun J, Tang Y, Sun Z, Zheng C, Shi H, Lin L. Damage to urban buildings in zones of intensities VIII and VII during the Wenchuan Earthquake and discussion on some typical damages. Earthquake Science, 2009, 22(2): 165-173.

[23] Sun B, Yan P. Damage characteristics and seismic capacity of buildings during Nepal Ms 8.1 earthquake. Earthquake Engineering and Engineering Vibration, 2015, 14(3): 571-578.

[24] Sun B, Zhang G. The Wenchuan Earthquake creation of a rich database of building performance. Science China Technological Sciences, 2010, 53: 2668-2680.

[25] Sun B, Zhang G. Study on fragility matrices of masonry buildings of mainland China. Earthquake Engineering and Engineering Vibration, 2018, 17(2): 251-259.

[26] Thakur A, Kasilingam S. Influential parameters on the seismic performance of confined masonry – A comprehensive review. Journal of Building Rehabilitation, 2024, 9: Article 61

[27] Wang Y. Comparison of seismic actions and structural design requirements in Chinese code GB 50011 and international standard ISO 3010. Earthquake Engineering and Engineering Vibration, 2004, 3: 1-9

[28] Wang Y, He J, Luo Y. Seismic response of the Lengzhuguan slope during Kangding Ms5.8 earthquake. Journal of Mountain Science, 2017, 14: 2337-2347.

[29] Xie LL, Ma YH, Hu JJ. A conception of casualty control based seismic design for buildings. Natural Hazards, 2007, 40: 279-287.

[30] Xiong F, Xie L, Ge Q, Zhang J. Reconnaissance report on buildings damaged during the Lushan Earthquake, April 20, 2013. Natural Hazards, 2015, 76: 635-650.

[31] Xu D, Zhuang L, Deng X, Qing C, Yong Z. Media exposure, disaster experience, and risk perception of rural households in earthquake-stricken areas: evidence from rural China. International Journal of Environmental Research and Public Health, 2020, 17(9): Article 3246.

[32] Yan P, Sun B, Zhou Q. The failure mechanism analysis on a reinforced concrete frame structure in Beichuan County – the heavy disaster areas of Wenchuan 8.0 earthquake. Key Engineering Materials, 2010, 452–453: 221-224.

[33] Yao X, Liang B, Sun B, Wang D, Gao W. Integrated disaster matrix and fragility index analyze the seismic performance of typical structures in rural villages in historical earthquakes. Advances in Structural Engineering, 2022, 25(14): 2981-2997.

[34] Zhang G, Sun B. A method for earthquake damage prediction of building groups based on multiple factors. World Earthquake Engineering, 2010, 26(1): 26-30

[35] Zhang M, Jin Y. Building damage in Dujiangyan during Wenchuan earthquake. Earthquake Engineering and Engineering Vibration, 2008, 7: 263-269.

[36] Zhang X, Dong Y, Xie Y, Guo F, Fang D. Nonlinear seismic response of soft soil site in Shanghai. Vibroengineering Procedia, 2023, 53: 34-40.

[37] Zhang Z, Liu C, Wang F. Preliminary study on relation of fault activity and seismicity in the Shanghai region. Earthquake Research in China, 2004, 20(2): 143-151

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