摘要
目前,计算格构梁的力学模型中,多采用弹性地基梁法进行计算,而对于边坡上的格构梁,受坡角和锚索倾角的影响,梁底面摩擦力的存在使得格构梁受力变得复杂。因此,在计算中采用合理的计算模型真实地反映格构梁的受力状态显得尤为重要。通过对多节点加载预应力锚索格构梁室内模型试验的研究,认为受边坡坡角和锚索倾角的影响,格构梁底面存在的摩擦力对格构梁的变形和受力状态有较大影响,并对实测结果与理论计算结果进行了对比分析,认为采用考虑摩擦的Winkler弹性地基梁模型能很好地反映格构梁的实际受力状态,更适合于工程应用。
At the present,the mechanical calculation models of lattice beam usually adopt elastic foundation beam method.But for the lattice beam on the slope,the existence of bottom surface fiction makes the stress complex.Therefore,it is important to reflect the true stress of lattice beam with reasonable calculation model.Through study on model experiment of multi-nodal load prestressed anchor-rope and lattice beam in laboratory,it is thought that the friction on base surface may directly affect deformation and stress towards lattice beam on slope because of the effect of slope angle and anchor-rope dip angle.Based on this point,this paper adopts method of Winkler elastic foundation beam which considers friction in theoretical calculation,and compares test results with the calculated ones,it is conformed that this foundation model can reflect the stress condition of grade beam,and make the calculated results more reliable and suitable for engineering application.
出处
《水土保持研究》
CSCD
北大核心
2012年第2期264-266,270,共4页
Research of Soil and Water Conservation
基金
地质灾害防治与地质环境保护国家专业实验室开放基金资助项目(DZZH1-3)
