Seismic resilience assessment of group building structures at urban scale: a case study of Shaanxi province

doi:10.16265/j.cnki.issn1003-3033.2026.06.0877

Abstract

Abstract:

To achieve an efficient assessment of the seismic resilience of urban scale building groups, to reduce the sharp growth in computational demand caused by large-scale nonlinear time-history analysis, and to overcome the limitation of traditional assessment based only on the proportion of building count ratios as statistical evidence, empirical fragility functions were first constructed based on the target structural type to determined its damage states under frequent and rare earthquakes. Second, according to the “Standard for seismic resilience assessment of building”, the repair time, repair cost and casualty indicators under the aforementioned earthquake actions were quantified to evaluate the seismic resilience levels of individual structures. Then, the individual structures with different seismic resilience levels were classified, and a regional seismic resilience index(RI) based on the proportion of building area was proposed. Finally, the group building structure in Shaanxi Province is taken as an example for application analysis. The results show that Ankang city has the highest seismic resilience level, whereas Yulin city has the lowest. Considering the three dimensions of repair time, repair cost and casualties, Ankang, Yan'an and Hanzhong cities perform relatively well. There are certain differences between the regional seismic RI based on the number of individual structures and those based on the proportion of building area. Relying solely on the number of individual buildings may underestimate the contribution of large buildings to overall resilience, and the actual urban recovery capacity is therefore underestimated.

Key words: building structure community, seismic resilience, empirical fragility, repair time, repair cost, casualties

CLC Number:

X915.5

Zhou Zhou, Zhang Weichao, Tian Qianrun, Tian Qinhu, Yu Xiaohui. Seismic resilience assessment of group building structures at urban scale: a case study of Shaanxi province[J]. China Safety Science Journal, 2026, 36(6): 238-245.

Figures/Tables 6

Table 1

Table 2

Fig.1

Table 3

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层数	数量/万栋
层数	6度0.05 g	7度0.10 g	7度0.15 g	8度0.2 g
1	9.35	1.15	2.73	1.36
2~3	14.50	3.69	8.24	4.74
4~5	2.17	1.32	1.50	1.01
6~8	2.46	1.23	2.63	1.63
9~12	0.24	0.01	0.32	0.21
13~16	0.12	0.03	0.15	0.08
17~20	0.26	0.10	0.38	0.19
>20	0.26	0.14	0.87	0.61

层数	抗震设防烈度	LS₁	LS₂	LS₃	LS₄
1	6度/未设防	0.06	0.17	0.45	0.60
	7度(0.10 g)	0.07	0.2	0.48	1.23
	7度(0.15 g)	0.08	0.21	0.53	1.30
	8度(0.20 g)	0.1	0.27	0.65	1.50
2~3	6度/未设防	0.06	0.23	0.35	0.42
	7度(0.10 g)	0.1	0.25	0.4	0.95
	7度(0.15 g)	0.12	0.35	0.42	1.00
	8度(0.20 g)	0.13	0.45	0.45	1.20
4~5	6度/未设防	0.05	0.12	0.3	0.41
	7度(0.10 g)	0.1	0.2	0.42	0.70
	7度(0.15 g)	0.1	0.25	0.44	0.85
	8度(0.20 g)	0.15	0.28	0.48	0.99
6~8	6度/未设防	0.05	0.15	0.25	0.50
	7度(0.10 g)	0.06	0.15	0.32	0.92
	7度(0.15 g)	0.06	0.24	0.35	1.00
	8度(0.20 g)	0.08	0.3	0.45	1.30
9~12	6度/未设防	0.06	0.18	0.4	0.53
	7度(0.10 g)	0.08	0.22	0.5	1.00
	7度(0.15 g)	0.09	0.24	0.68	1.05
	8度(0.20 g)	0.1	0.24	0.7	1.15
13~16	6度/未设防	0.05	0.15	0.23	0.54
	7度(0.10 g)	0.1	0.2	0.4	0.77
	7度(0.15 g)	0.1	0.2	0.51	0.80
	8度(0.20 g)	0.12	0.25	0.55	0.85
17~20	6度/未设防	0.03	0.12	0.26	0.40
	7度(0.10 g)	0.1	0.15	0.4	0.75
	7度(0.15 g)	0.1	0.15	0.45	0.76
	8度(0.20 g)	0.15	0.2	0.53	0.90
>20	6度/未设防	0.1	0.2	0.44	0.44
	7度(0.10 g)	0.15	0.25	0.53	0.83
	7度(0.15 g)	0.18	0.25	0.55	0.92
	8度(0.20 g)	0.2	0.4	0.6	1.02

城市	区域抗震RI
城市	RI₀	RI₁	RI₂
西安市	2.02	13.64	84.35
铜川市	1.89	4.56	93.56
宝鸡市	1.36	21.32	77.33
咸阳市	1.82	23.26	74.92
渭南市	2.53	8.36	89.12
延安市	1.55	0.14	98.31
汉中市	1.58	3.06	95.37
榆林市	7.55	0.35	92.11
安康市	0.97	8.76	90.27
商洛市	3.10	13.07	83.83