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(上海市建筑科學(xué)研究院有限公司 上海市工程結(jié)構(gòu)安全重點(diǎn)實(shí)驗(yàn)室, 上海 200032)

摘要: 地震損失風(fēng)險(xiǎn)可反映建筑結(jié)構(gòu)的抗震性能,其定量評(píng)價(jià)不僅是結(jié)構(gòu)抗震設(shè)計(jì)參數(shù)選擇的重要環(huán)節(jié),也是防震減災(zāi)決策的重要依據(jù). 為研究采用不同抗震構(gòu)造措施的砌體結(jié)構(gòu)的抗震能力,提出了砌體結(jié)構(gòu)基于地震危險(xiǎn)性和結(jié)構(gòu)易損性的損失評(píng)估方法. 設(shè)計(jì)了 25 種不同抗震構(gòu)造措施的砌體結(jié)構(gòu)模型,采用非迭代靜力分析的砌體結(jié)構(gòu)易損性分析方法研究了地震作用下砌體結(jié)構(gòu)的失效概率,并分析了砌體結(jié)構(gòu)在 1 年和 50 年內(nèi)可能發(fā)生的經(jīng)濟(jì)損失和人員傷亡損失風(fēng)險(xiǎn). 結(jié)果表明,抗震構(gòu)造措施可顯著降低砌體結(jié)構(gòu)地震損失風(fēng)險(xiǎn),無抗震構(gòu)造措施的砌體結(jié)構(gòu)倒塌概率是采用完備抗震構(gòu)造措施時(shí)的 5. 5 倍. 基于人員傷亡率控制的計(jì)算結(jié)果與現(xiàn)行設(shè)計(jì)規(guī)范要求基本一致,但對(duì)低層砌體結(jié)構(gòu)的抗震構(gòu)造措施要求更為寬松.

關(guān)鍵詞: 多層砌體結(jié)構(gòu); 抗震構(gòu)造措施; 易損性分析; 地震損失風(fēng)險(xiǎn)

中圖分類號(hào):TU311,TU362 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):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

∗國家重點(diǎn)研發(fā)計(jì)劃(2017YFC0702900),上海市科學(xué)技術(shù)委員會(huì)項(xiàng)目(19DZ1202400).

第一作者:張永群,博士,高級(jí)工程師,主要從事工程結(jié)構(gòu)抗震方向,Email: zyq2007yh@ 163. com.

[引用本文]張永群,王卓琳,蔣利學(xué),等. 基于地震損失風(fēng)險(xiǎn)的多層砌體結(jié)構(gòu)抗震構(gòu)造措施評(píng)估[ J]. 建筑結(jié)構(gòu),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