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[1]LIU Fusheng,LI Cong,GAO Qinhao,et al.Analysis of the Periodic Characteristics and Influencing Factors of Near-fault Acceleration Pulses and Non-acceleration Pulses[J].Journal of Seismological Research,2025,(03):488-495.[doi:10.20015/j.cnki.ISSN1000-0666.2025.0051 ]

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Analysis of the Periodic Characteristics and Influencing Factors of Near-fault Acceleration Pulses and Non-acceleration Pulses

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: Number of periods: 2025 03 Page number: 488-495 Column: Public date: 2025-04-15

Title:: Analysis of the Periodic Characteristics and Influencing Factors of Near-fault Acceleration Pulses and Non-acceleration Pulses

Author(s):: LIU Fusheng¹; LI Cong²; 4; GAO Qinhao³; LI Wanheng²; CHANG Zhiwang²; ZHANG Yingbin²; (1.China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan 430063,Hubei,China)(2.College of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China)(3.College of Architectural Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China)(4.Jiangsu Nuclear Power Co.,Ltd.,Lianyungang 222000,Jiangsu,China)

Keywords:: near-fault ground motion; acceleration pulse; non-acceleration pulse; pulse period; single-degree-of-freedom system

CLC:: P315.92

DOI:: 10.20015/j.cnki.ISSN1000-0666.2025.0051

Abstract:: It is the near-fault velocity-pulse ground motion,rather than the ordinary far-field ground motion,that causes the structure's significant deformation,and increases the risk of structural collapse.The existing research shows that the velocity pulse can be divided into the acceleration pulse and the non-acceleration pulse.A systematic analysis of the characteristics of the pulse's parameters and structural response under the pulse's action is helpful to the seismic design and the evaluation of the near-fault engineering structures.Firstly,the period of the velocity pulse is determined with the peak-point method,then,the period is compared with the ones obtained with the S_v method and the S_d·S_v method.Secondly,through regression analysis,the statistical model of the relationship between the period of the acceleration pulse(T_P)and the moment magnitude(M_W)is given.And the statistical model of the relationship between the period of the non-acceleration pulse(T_P)and the moment magnitude(M_W)is given too.The statistical model of the relationship between the peak velocity of the acceleration pulse(PGV)and the moment magnitude(M_W)and the fault distance(R)is given.In the same way,the statistical model of the relationship between the peak velocity of the non-acceleration pulse(PGV)and the moment magnitude(M_W)and the fault distance(R)is given too.Finally,the structural dynamic responses of four single-degree-of-freedom systems to the acceleration impulse and the non-acceleration impulse are analyzed.The results show that for short-period structures,the acceleration pulse causes more serious structural damage than the non-acceleration pulse does; for medium-long period structures,the acceleration pulse causes less structural response than the non-acceleration pulse does.

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Last Update: 2025-04-15