Estimation of input energy spectrum from pseudo-velocity response spectrum incorporating the influences of magnitude, distance, and site conditions
Estimation of input energy spectrum from pseudo-velocity response spectrum incorporating the influences of magnitude, distance, and site conditions
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结合震级、距离和场地条件的影响,根据伪速度响应谱估计输入能量谱
DOI:
10.1016/j.engstruct.2022.115165
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发表时间:
2023-01
影响因子:
5.5
通讯作者:
Tsutomu Ochiai
中科院分区:
文献类型:
--
作者:
Haizhong Zhang;Yan-Gang Zhao;Fang-Wen Ge;Yingchi Fang;Tsutomu Ochiai
The input energy spectrum is useful information for determining the hysteretic energy demand in energy-based seismic design. The input energy spectrum commonly expressed in terms of the energy equivalent velocity spectrum,Veq, can be easily established from the code-specified response spectra (RS) based on the relationship betweenVeqand RS. Several formulations for theVeq-RS relationship have been developed; however, all of them ignore the influences of magnitude, distance, and site conditions. The aim of this study is to propose a practical formulation for the relationship betweenVeqand the pseudo-velocity response spectrum,RSpv, incorporating the influences of magnitude, distance, and site conditions. Firstly, to explore the influences of magnitude, distance, and site conditions on theVeq-RSpvrelationship, an approach for estimatingVeq/RSpvis proposed based upon random vibration theory and verified by comparison with the values calculated by traditional time-series analysis. It is found that the magnitude influencesVeq/RSpvthe most among these parameters by changing the frequency content of the ground motion, and theVeq/RSpvvalues at long oscillator periods decrease significantly with an increasing magnitude. Then, based on these conclusions, a practicalVeq/RSpvformulation incorporating the influences of magnitude, distance, and site conditions was developed using 16,660 real seismic ground motions in Japan.
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DOI:
10.6028/nbs.ir.82-2589
发表时间:
1994
期刊:
--
影响因子:
--
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