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| Seismic displacement calculation method of slope with considering strain-softening effect of slip surface |
| Received:July 01, 2023 Revised:August 18, 2023 |
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| DOI：10.7511/jslx20230701002 |
| KeyWord:slope strain softening Newmark sliding block displacement method seismic displacement real-time dynamic |
| Author | Institution |
| 王家鑫 |
武汉理工大学 土木工程与建筑学院, 武汉 |
| 夏元友 |
武汉理工大学 土木工程与建筑学院, 武汉 |
| 王智德 |
武汉理工大学 土木工程与建筑学院, 武汉 |
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| Abstract: |
| The Newmark sliding block displacement method is used to calculate the seismic displacement of a slope,and the yield acceleration of a slope is considered to be a constant value,without considering the strain-softening effect of the slip surface and the influence of the real-time dynamic change of sliding slice geometric parameters during the seismic time history.For a homogeneous soil slope,based on the pseudo-static limit equilibrium theory,the calculated logarithmic spiral slip surface assumption,the strain-softening effect of the slip surface and the effect of real-time sliding angle on slice geometric parameters during the earthquake time history are considered,the formula for the dynamic yield acceleration and seismic displacement with considering the effect of strain-softening,and the calculation of slope seismic displacement is programmed.The results show that the slope dynamic yield acceleration firstly increases and then decreases as the steady growth of slope sliding angle.Considering the strain-softening effect,the calculated seismic displacement value of the slope is bigger than the calculated peak strength,but smaller than the calculated residual strength.With the decrease of the slope stability,the calculation results of the seismic displacement with and without strain softening effect both increuse,and the gap between them also increases. |
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