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Dynamic stability analysis of frame anchor-supported slope
Arabian Journal of Geosciences ( IF 1.827 ) Pub Date : 2021-07-26 , DOI: 10.1007/s12517-021-07879-6
Weina Ye 1, 2, 3 , Yong Zhou 1, 4 , Shuaihua Ye 1, 2, 3
Affiliation  

This study was undertaken in order to analyze the dynamic stability of the slope supported by frame structures with prestressed anchors under earthquake. Taking a mid-span column unit as the object, the dynamic earth pressure on the supporting structures by considering the slope acceleration amplification effect was analyzed, then the supporting structures were simplified, and the prestressed anchors were treated as the dynamic earth pressure on the supporting structure and the inertial force of the supporting structures in the same direction, so the simplified dynamic response model of supporting structure was established. The force method was used to solve the axial force of the anchors. Then the source of the axial force of the anchors was analyzed and range of anchoring area of anchors was solved. The horizontal soil strip was taken as the horizontal soil layer within the range of anchoring area of anchors. The vertical soil strip was taken as the vertical soil layer corresponding to the sliding surface of the horizontal soil strip. According to the failure mode of the slip surface of the soil slope that a dynamic stability model of the slope was established, by considering the influence of the vertical component of seismic action, on the basis of quasi-static method, the horizontal slice method and the vertical slice method were used to derive the slope dynamic stability coefficient calculation equation. Finally, using the algorithm in this paper and the finite element software Geo-Studio, the actual engineering examples were calculated. The results show that the algorithm in this paper has a certain degree of reliability, and can be used for this kind of engineering design and provide corresponding reference for the dynamic stability research of frame structures with prestressed anchors.



中文翻译:

框架锚固边坡动力稳定性分析

本研究旨在分析地震作用下预应力锚杆框架结构支撑的边坡的动力稳定性。以某中跨柱单元为对象,分析考虑坡度加速度放大效应的支护结构动土压力,进而简化支护结构,将预应力锚杆作为支护动土压力处理。结构与支撑结构的惯性力方向一致,建立了简化的支撑结构动力响应模型。采用力法求解锚杆的轴向力。然后分析了锚杆轴力的来源,求解了锚杆的锚固面积范围。水平土条为锚杆锚固区域范围内的水平土层。垂直土条取水平土条滑动面对应的垂直土层。根据土体边坡滑面破坏模式建立边坡动力稳定模型,考虑地震作用竖向分量的影响,在准静态法、水平切片法和采用垂直切片法推导出边坡动力稳定系数计算方程。最后,利用本文算法和有限元软件Geo-Studio,对实际工程实例进行计算。结果表明,本文算法具有一定的可靠性,

更新日期:2021-07-26
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