An interpretation of the seismic behaviour of reinforced-earth retaining structures
An interpretation of the seismic behaviour of reinforced-earth retaining structures
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DOI：
10.1680/geot.sip.15.p.001
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发表时间：
2015-09
期刊：
影响因子：
5.8
通讯作者：
L. Masini;L. Callisto;S. Rampello
中科院分区：
文献类型：
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作者：
L. Masini;L. Callisto;S. Rampello
本文对由土工合成材料加固土制成的挡土结构在严重地震荷载作用下的行为进行了解释。可以看出，在强烈的地面运动期间，能量耗散的主要来源来自土体内塑性机制的瞬时激活：这些机制可以是全局的、局部的或两者的组合。使用数值拟静力分析和极限分析方法表明，具有相似整体抗震能力（用其临界地震系数表示）的三个挡土结构激活了不同的（整体、局部或组合）塑性机制。然后通过一系列动态分析来评估不同挡土结构的抗震性能，其中将加速度-时间历史施加到用于伪静力分析的相同数值模型的底部边界。动态分析的结果根据评估的塑性机制进行解释...
This paper provides an interpretation of the behaviour of retaining structures made of geosynthetic-reinforced earth, subjected to a severe seismic loading. It is seen that during strong ground motion the main source of energy dissipation derives from the transient activation of plastic mechanisms within the soil mass: these mechanisms can be global, local, or a combination of the two. Using numerical pseudo-static analyses and limit analysis methods it is shown that three retaining structures having a similar overall seismic resistance, expressed by their critical seismic coefficient, activate different – global, local, or combined – plastic mechanisms. The seismic performance of the different retaining structures is then evaluated through a series of dynamic analyses in which acceleration–time histories are imposed to the bottom boundary of the same numerical models used for the pseudo-static analyses. The results of the dynamic analyses are interpreted in the light of the plastic mechanisms evaluated w...