A strain-hardening microplane damage model for thin-walled textile-reinforced concrete shells, calibration procedure, and experimental validation
A strain-hardening microplane damage model for thin-walled textile-reinforced concrete shells, calibration procedure, and experimental validation
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DOI：
10.1016/j.compstruct.2016.06.030
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发表时间：
2016-09-15
影响因子：
6.3
通讯作者：
Scholzen, A.
中科院分区：
文献类型：
--
作者：
Chudoba, R.;Sharei, E.;Scholzen, A.
纺织钢筋混凝土（TRC）薄壁壳结构具有较高的承载能力和延性。然而，材料的行为表现出几个相互作用的机制的材料解体，导致一个复杂的，高度非线性的结构响应。在本文中，将讨论能够捕捉这些效应的TRC各向异性材料模型。材料模型的校准是基于在单轴拉伸试验中测量的应变硬化响应的反分析进行的。最后，我们通过三点弯曲试验的有限元模拟来验证材料模型，以及在中心加载的板坯试验中观察到的复杂的双轴承重行为。在这种情况下，进一步的问题，如大挠度和几何非线性的影响将被研究。校正后的模型为深入分析薄壁TRC壳结构的结构性能提供了有价值的工具。这对于裂纹状态下的挠度以及应力重分布引起的承载储量的现实预测尤其重要。(C) 2016 Elsevier Ltd.版权所有。
Thin-walled shell structures made of textile-reinforced concrete (TRC) exhibit a high load-bearing capacity and considerable ductility. However, the material behavior exhibits several interacting mechanisms of material disintegration that result in a complex, highly nonlinear structural response. In this paper, an anisotropic material model for TRC will be discussed that is able to capture those effects. The calibration of the material model is performed based on an inverse analysis using the strain-hardening response measured in a uniaxial tensile test. Finally, we validate the material model through a finite-element simulation of three-point bending tests as well as the complex biaxial load-bearing behavior as observed in slab tests with central loading. In this context, further issues such as the influence of large deflections and geometrical nonlinearity will be investigated. The calibrated model provides a valuable tool for an in-depth analysis of the structural behavior of thin-walled TRC shell structures. This is especially important for a realistic prediction of the deflections in the cracked state as well as load-bearing reserves resulting from stress redistributions. (C) 2016 Elsevier Ltd. All rights reserved.