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大型高边坡群锚格构梁的优化研究

Optimization of Multi-Anchorage Lattice Beams on Large-Scale High Slopes
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摘要 基于大型高边坡的锚固模型,探究格构梁对于边坡稳定的影响,并优化格构梁的布局。根据某水电站坝址地形图建立边坡模型,按照锚索的实际分布,在该模型上用缆索元模拟锚索群,并按实际情况在模型上以梁单元模拟格构梁,考虑有/无格构梁的两个模型,以施工进程的方式进行对比分析,在此基础上优化格构梁的布局方案。结果表明,添加格构梁之后,边坡绝大部分位置的位移均有小幅度下降;在优化格构梁的布局后,边坡位移有所下降,而格构梁对边坡施加的作用力提高了36.6%;铺设格构梁后,边坡表面应力集中现象得到一定缓解;格构梁中横梁多受拉,竖梁多受压,应根据边坡不同区域的受力特点进行格构梁的布局。 The influence of lattice beams on slope stability was analyzed by finite element analysis,and the layout of lattice beams was optimized. According to the topographic map of a hydropower dam site and the distribution of anchor cables,a 3D geology model with anchor cables was constructed( model Ⅰ).Based on model Ⅰ,another model with lattice beams was developed( model Ⅱ),and both models were analyzed during construction process for comparison. Then the layout of lattice beams was redesigned.The results showthat the node displacements in most part of the slope in model Ⅱ were lower than those in model Ⅰ. The slope becomes more stable in the optimal layout of lattice beams. Moreover,the loads on the lattice beams increase 36. 6%. The lattice beams reduce the stress concentration in the slope. The tensile stress is dominant in the horizontal lattice beams,and the compressive stress is dominant in the vertical lattice beams,and the layout of lattice beams should be designed in accordance with the load characters of the slope.
出处 《应用数学和力学》 CSCD 北大核心 2015年第S1期139-146,共8页 Applied Mathematics and Mechanics
基金 国家自然科学基金(11202143)~~
关键词 高边坡 格构梁 有限元方法 位移分布 优化设计 high slope lattice beam finite element method displacement distribution optimal design
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参考文献6

  • 1向安田.高边坡预应力锚索格梁的承载机理及设计分析研究[D].同济大学2007
  • 2Saeed Alamshahi,Nader Hataf.Bearing capacity of strip footings on sand slopes reinforced with geogrid and grid-anchor[J]. Geotextiles and Geomembranes . 2008 (3)
  • 3Anders Ansell.The dynamic element method for analysis of frame and cable type structures[J]. Engineering Structures . 2005 (13)
  • 4The influence of load on the frequency response of rock bolt anchorage[J]. Advances in Engineering Software . 2003 (11)
  • 5R. Ince,A. Arslan,B.L. Karihaloo.Lattice modelling of size effect in concrete strength[J]. Engineering Fracture Mechanics . 2002 (16)
  • 6XIONG Bao-lin,LU Chun-jiao.Three-dimensional finite element analysis of railway subgrade strengthened by lattice beams of prestress cable. Proceedings of 2011 International C onference Electric T echnology and C ivil Engineering (IC ET C E) . 2011

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