边坡动力稳定性分析的时程传递系数法

发布时间：2018-04-23 15:33

本文选题：地震工程 + 时程传递系数　；参考：《重庆交通大学学报(自然科学版)》2017年11期

【摘要】：传递系数法是边坡稳定性计算常用方法之一。水平地震力是边坡动力稳定性影响的主要因素,针对传统边坡稳定性计算的传递系数法,将地震加速度时程通过地震力形式归于传递系数法中的条块传递系数,计算传递系数时程,进而得到地震动力稳定系数时程,基于此提出了边坡动力稳定性分析的时程传递系数法。算例讨论得出,当地震加速度大于-0.2时,传递系数呈现出先减小后增加、再减小的整体趋势,反之,传递系数随条块表现为持续降低的规律;当地震加速度小于0时,加速度方向为反坡向,对边坡稳定性有利,反之,加剧边坡的危险性;随着地震加速度的递增,不同条块的传递系数不断线性增大。岩质边坡在地震力作用下破坏具有滞后性和突发性。
[Abstract]:Transfer coefficient method is one of the commonly used methods for slope stability calculation. Horizontal seismic force is the main factor affecting the dynamic stability of slope. In view of the transfer coefficient method of traditional slope stability calculation, the seismic acceleration time history is attributed to the strip transfer coefficient in the transfer coefficient method through the form of seismic force. The time-history of the seismic dynamic stability coefficient is obtained by calculating the time-history of the transfer coefficient. Based on this, the time-history transfer coefficient method for slope dynamic stability analysis is proposed. When the seismic acceleration is greater than -0.2, the transfer coefficient shows an overall trend of decreasing first, then increasing, then decreasing. Conversely, the transfer coefficient decreases continuously with the strip, and when the seismic acceleration is less than 0, the transfer coefficient decreases continuously. The direction of acceleration is reverse slope direction, which is favorable to slope stability, otherwise, it intensifies the danger of slope, and with the increase of seismic acceleration, the transfer coefficient of different segments increases linearly. The failure of rock slope under earthquake force is delayed and sudden.
【作者单位】：重庆建筑工程职业学院;重庆交通大学土木工程学院;
【基金】：国家自然科学基金项目(51378520) 重庆市教委科学技术研究项目(KJ1740469) 重庆市高等教育教学改革研究项目(153296)
【分类号】：TU435

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