(上海市建筑科学研究院有限公司 上海市工程结构安全重点实验室, 上海 200032)

摘要: 地震损失风险可反映建筑结构的抗震性能,其定量评价不仅是结构抗震设计参数选择的重要环节,也是防震减灾决策的重要依据. 为研究采用不同抗震构造措施的砌体结构的抗震能力,提出了砌体结构基于地震危险性和结构易损性的损失评估方法. 设计了 25 种不同抗震构造措施的砌体结构模型,采用非迭代静力分析的砌体结构易损性分析方法研究了地震作用下砌体结构的失效概率,并分析了砌体结构在 1 年和 50 年内可能发生的经济损失和人员伤亡损失风险. 结果表明,抗震构造措施可显著降低砌体结构地震损失风险,无抗震构造措施的砌体结构倒塌概率是采用完备抗震构造措施时的 5. 5 倍. 基于人员伤亡率控制的计算结果与现行设计规范要求基本一致,但对低层砌体结构的抗震构造措施要求更为宽松.

关键词: 多层砌体结构; 抗震构造措施; 易损性分析; 地震损失风险

中图分类号:TU311,TU362 文献标志码:A 文章编号:1002-848X(2023)02-0107-06

DOI:10. 19701 / j. jzjg. LS210045

Evaluation of seismic structural measures of multi-storey masonry structures based on seismic loss risk

ZHANG Yongqun, WANG Zhuolin, JIANG Lixue, LENG Yubing

(Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building SciencesCo. , Ltd. , Shanghai 200032, China)

Abstract: Seismic loss risk can reflect the seismic performance of building structures, and its quantitative evaluation is notonly an important link in the selection of structural seismic design parameters, but also an important basis for earthquakeprevention and disaster mitigation decisions. In order to evaluate the seismic capacity of masonry structures with differentseismic structural measures, a method for calculating seismic loss based on sesmic risk and structural fragility wasproposed. 25 types of masonry structure models with different seismic measures were designed, and failure probability ofmasonry structures under earthquake action was studied by using non-iterative static analysis method for masonry structurefragility analysis. The annual and 50-year risk of economic loss and casualty loss that may occur in masonry structures wereanalyzed. The results indicate that the earthquake loss risk decreases with the increase of seismic measures, and thecollapse probability of masonry structure without seismic structural measure is 5. 5 times of that with sufficient seismicstructural measure. The calculation results based on casualty rate control are basically consistent with the requirements ofthe current design code, but the requirements for seismic structural measures of low-rise masonry structures are morerelaxed.

Keywords:multi-storey masonry structure; seismic structural measure; fragility analysis; seismic loss risk

∗国家重点研发计划(2017YFC0702900),上海市科学技术委员会项目(19DZ1202400).

第一作者:张永群,博士,高级工程师,主要从事工程结构抗震方向,Email: zyq2007yh@ 163. com.

[引用本文]张永群,王卓琳,蒋利学,等. 基于地震损失风险的多层砌体结构抗震构造措施评估[ J]. 建筑结构,2023,53(2):107-112. ZHANG Yongqun,WANG Zhuolin,JIANG Lixue,et al. Evaluation of seismic structural measures ofmulti-storey masonry structures based on seismic loss risk [J]. Building Structure,2023,53(2):107-112