Compressive failure of concrete tunnel lining simulated by different compressive models
Compressive failure of concrete tunnel lining simulated by different compressive models
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DOI：
10.2208/journalam.6.1207
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发表时间：
2003-08
期刊：
影响因子：
--
通讯作者：
Wei He;Zhishen Wu;J. Yin;Y. Kojima
中科院分区：
文献类型：
--
作者：
Wei He;Zhishen Wu;J. Yin;Y. Kojima
使用中的混凝土隧道衬砌受到地面土壤的约束。隧道衬砌的变形特征和承载能力随土体约束变化明显。此外，由于土壤的约束，最终的破坏往往由混凝土的压缩行为主导。因此，采用合理的混凝土压缩模型对于评价混凝土隧道衬砌的结构性能非常重要。基于此考虑，本文讨论了理想弹塑性压缩模型和抛物线压缩软化模型等不同压缩模型的有效性和效率。指出考虑压缩断裂能的抛物线压缩软化模型比理想弹塑性压缩模型更适合分析混凝土隧道的压缩行为。
Concrete tunnel linings under service are subjected to the soil constraint of ground. The deformation characteristics and load-carrying capacity of tunnel linings are clearly varied with the soil constraint. Moreover, due to the soil constraint, the final failure is often dominated by the compressive behavior of concrete. Then for the adoption of a rational compressive model of concrete is considered to be very important for evaluating the structural performance of concrete tunnel linings. Based on this consideration, the effectiveness and efficiency of different compressive models, such as ideal elastic-plastic compressive model and parabolic compressive softening model, are discussed in this paper. It is pointed that parabolic compressive softening model with a consideration of compressive fracture energy is more appropriate to analyze the compressive behavior of concrete tunnel than ideal elastic-plastic compressive model.