建筑结构学报2026，Vol.47Issue(3)：83-93,11.DOI:10.14006/j.jzjgxb.2025.0361
近断层脉冲地震动对高烈度抗震设防区高层钢框架-支撑筒结构的影响分析
Study on seismic response of high-rise steel frame-braced core structures in high seismic intensity region subjected to near-fault pulse-like ground motions
摘要
Abstract
To analyze the impact of near-fault pulse-like ground motions on high-rise steel structures,a 22-story steel frame-braced core structure was used as an example.A total of 97 near-fault pulse-like ground motions were selected,and their pulse components were removed to obtain 97 non-pulse-like ground motions.These 194 ground motions were input into the example structure to conduct elastic-plastic analysis,and the amplification effect of structural seismic response under near-fault pulse-like earthquakes was analyzed.Analysis results indicate that average amplification coefficients of story shear force,story drift and story displacement(δV,ave,δdri,ave,δdisp,ave)exceed 1.0,with maximum values of 1.18,1.38,and 1.38,respectively.Near-fault pulse-like ground motions significantly affect structural displacements.The amplification coefficients are influenced by the pulse period,fault type,fault distance and peak ground acceleration(PGA).As the pulse period increases,the amplification coefficients decrease with fluctuations.For shorter fault distances,the amplification coefficients gradually increase by up to 10%.Under the same PGA,strike-slip faults exhibit higher amplification coefficients than reverse faults,with a maximum increase of 24%.For an exceedance probability of 63%,the estimated shear amplification coefficient(δV,e)decreases with increasing PGA,with a variation range of[1.12,1.28],while the estimated story drift and displacement amplification coefficients(δdri,e and δdisp,e)increase with increasing PGA,both with a variation range of[1.32,1.50].At 2%exceedance probability,δV,e decreases with increasing PGA,with a variation range of[1.17,1.38],while δdri,e and δdisp,e increase with increasing PGA,with variation ranges of[1.43,1.66]and[1.44,1.66]respectively.Based on the exceedance probabilities for frequent and rare earthquakes,for the example structure,the structural response amplification coefficient can be taken as 1.32 under frequent earthquake.Under rare earthquake,the amplification coefficients of story shear force and structural displacement are 1.25 and 1.50,respectively.关键词
高层钢结构/近断层/脉冲地震动/动力弹塑性分析/地震响应/放大效应Key words
high-rise steel structure/near-fault/pulse-like ground motion/dynamic elastic-plastic analysis/seismic response/amplification effect分类
建筑与水利引用本文复制引用
涂雨,刘宜丰,肖博文,李常虹,谢俊乔,冼嘉华..近断层脉冲地震动对高烈度抗震设防区高层钢框架-支撑筒结构的影响分析[J].建筑结构学报,2026,47(3):83-93,11.基金项目
中建股份科技研发课题(CSCEC-2023-Z-18). （CSCEC-2023-Z-18）
