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现行加筋土墙设计通常是采用一种类似于不可延伸的金属材料基于极限应力的概念进行分析或是在全比尺加筋土墙结构中进行测试取得设计实验参数。采用恰如其份的工作应力方法进行设计是一项进步,但它须从根本上了解土体在受荷变形时其中加强筋所产生的作用,并且要有一个合理的相对简易的荷载传递模型来模拟土和加强筋间的相互作用。此外,含有加强筋的整个加筋土体的特性是和土的初始应力应变状态密切相关的。所以,施工步骤和压实情况对加筋土墙在预期实际工作荷载下的结构性能将产生显著影响。应变相容设计方法的基本原理是根据实际建筑物(挡墙)沿着可能的破裂界面发生平面应变剪切与加筋土的直剪试验这二者的力学相似。分析中采用的土——加强筋荷载传递模型,可用来计算土的剪胀性与加强筋的延伸性对加强筋的拉力和破裂面位置的影响。为着验证模型或设计中的假定,用结构物施工方法的数值模拟和室内缩尺模型的破坏试验进行比较;也与在缩尺模型和全比尺加筋土墙结构中的加强筋所产生的拉力的实测值进行比较。
The current reinforced earth wall design is usually based on the concept of limit stress similar to the non-extendable metal material analysis or test in the full scale reinforced earth wall structure to obtain design experimental parameters. Designing with a proper working stress method is an improvement, but it must fundamentally understand the effect of the stiffeners when the soil is deformed under load, and it must have a reasonable and relatively simple load transfer model. Simulate the interaction between soil and stiffeners. In addition, the characteristics of the entire reinforced soil containing stiffeners are closely related to the initial stress-strain state of the soil. Therefore, the construction steps and compaction conditions will have a significant effect on the structural performance of the reinforced earth wall under the expected actual working load. The basic principle of the strain-compatible design method is the mechanical similarity between the plane shear strain of the actual building (retaining wall) along the possible fracture interface and the direct shear test of the reinforced soil. The soil-ribbed load transfer model used in the analysis can be used to calculate the dilatancy of the soil and the effect of the extension of the stiffener on the tensile force and the position of the rupture surface of the stiffener. In order to verify the assumptions in the model or design, the numerical simulation of the construction method of the structure is compared with the destruction test of the indoor scale model; it is also related to the reinforcement in the scale model and the full-scale reinforced earth wall structure. The measured values of the pull force are compared.