| Study on inelastic displacement ratio spectra for near-fault pulse-type ground motions |
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| 作者姓名： | 翟长海 李爽 谢礼立 孙亚民 |
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| 作者单位： | School of Civil Engineering Harbin Institute of Technology，School of Civil Engineering Harbin Institute of Technology，School of Civil Engineering Harbin Institute of Technology Institute of Engineering Mechanics China Earthquake Administration Harbin 150080 China，School of Civil Engineering Harbin Institute of Technology，Harbin 150090 China，Harbin 150090 China，Harbin 150090 China，Harbin 150090 China |
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| 基金项目： | National Natural Science Foundation of China Under Grants No. 50608024 and
No.50538050，Opening Laboratory of Earthquake Engineering and Engineering Vibration Foundation Under Grant No.2007001 |
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| 摘 要： | In displacement-based seismic design, inelastic displacement ratio spectra (IDRS) are particularly useful for estimating the maximum lateral inelastic displacement demand of a nonlinear SDOF system from the maximum elastic displacement demand of its counterpart linear elastic SDOF system. In this study, the characteristics of IDRS for near-fault pulse-type ground motions are investigated based on a great number of earthquake ground motions. The in? uence of site conditions, ratio of peak ground velocity (PGV) to peak ground acceleration (PGA), the PGV, and the maximum incremental velocity (MIV) on IDRS are also evaluated. The results indicate that the effect of near-fault ground motions on IDRS are signifi cant only at periods between 0.2 s - 1.5 s, where the amplifi cation can approach 20%. The PGV/PGA ratio has the most signifi cant in? uence on IDRS among the parameters considered. It is also found that site conditions only slightly affect the IDRS.
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| 关 键 词： | 断层 脉冲 地壳运动 无弹性位移 |
| 收稿时间： | 11 July 2007 |
| 修稿时间： | 10 October 2007 |
Study on inelastic displacement ratio spectra for near-fault pulse-type ground motions |
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| Zhai?Changhai,Li?Shuang,Xie?Lili,Sun?Yamin.Study on inelastic displacement ratio spectra for near-fault pulse-type ground motions[J].Earthquake Engineering and Engineering Vibration,2007,6(4):351-355. |
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| Authors: | Zhai Changhai Li Shuang Xie Lili Sun Yamin |
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| Institution: | 1. School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China
2. School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China |
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| Abstract: | In displacement-based seismic design, inelastic displacement ratio spectra (IDRS) are particularly useful for estimating the maximum lateral inelastic displacement demand of a nonlinear SDOF system from the maximum elastic displacement demand of its counterpart linear elastic SDOF system. In this study, the characteristics of IDRS for near-fault pulse-type ground motions are investigated based on a great number of earthquake ground motions. The influence of site conditions, ratio of peak ground velocity (PGV) to peak ground acceleration (PGA), the PGV, and the maximum incremental velocity (MIV) on IDRS are also evaluated. The results indicate that the effect of near-fault ground motions on IDRS are significant only at periods between 0.2 s–1.5 s, where the amplification can approach 20%. The PGV/PGA ratio has the most significant influence on IDRS among the parameters considered. It is also found that site conditions only slightly affect the IDRS. |
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| Keywords: | near-fault pulse-type ground motion inelastic displacement ratio spectrum ground motion parameter PGV/PGA site condition |
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