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Revised Seismic Intensity Parameters for Middle-Field Horizontal and Rocking Strong Ground Motions
| 题名： | Revised Seismic Intensity Parameters for Middle-Field Horizontal and Rocking Strong Ground Motions |
| 正文语种： | 英文 |
| 作者： | M. R. Falamarz-Sheikhabadi; A. Zerva, A.M.ASCE;M. Ghafory-Ashtiany |
| 作者单位： | Drexel Univ;International Institute of Earthquake Engineering and Seismology |
| 关键词： | Middle-field zone; Strong ground motion; Coherency function; Rocking component; Response spectrum; Seismic intensity parameter; P-A effect; Multistory 2D frames; Seismic effects. |
| 摘要： | This paper presents a new method for determining rocking ground motion considering the effects of both time delay and loss of coherency in spatially variable seismic ground motions. Acceleration, velocity, and displacement response spectra resulting from the rocking component are also derived. Next, new seismic intensity parameters are proposed to estimate the combined action of the middle-field horizontal and rocking motions on the earthquake excitation of structures. These seismic intensity parameters are revised forms of the widely used ones for characterizing translational components, namely, peak ground velocity, peak ground displacement, cumulative absolute displace-ment, acceleration response spectrum, acceleration spectrum intensity, Fajfar intensity, and Kappos spectrum intensity. In addition, an expression for the estimation of the effect of the base tilt due to the rocking ground motion on the structural response is presented. The main advantage of the proposed relations is that they can be easily used to evaluate the approximate effect of the rocking component on the seismic excitation of structures. DOI: 10.106l/(ASCE)ST.1943-541X.0001646. © 2016 American Society of Civil Engineers. |
| 出版日期： | 2017.01 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.01 |
| 页码： | 04016155 |
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