Modeling and Analysis of Shear-critical ECC Members with Anisotropic Stress and Strain Fields
Modeling and Analysis of Shear-critical ECC Members with Anisotropic Stress and Strain Fields
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DOI：
10.3151/jact.8.239
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发表时间：
2010-06
影响因子：
2
通讯作者：
B. Suryanto;K. Nagai;K. Maekawa
中科院分区：
文献类型：
--
作者：
B. Suryanto;K. Nagai;K. Maekawa
本文描述了一种尝试，以预测剪切临界ECC成员，表现出强各向异性应力和应变场的响应。研究的ECC构件包括应力场旋转下的预裂纹ECC板、纯剪切下的正交增强ECC（R/ECC）板和反向循环载荷下的剪切临界R/ECC梁。为了实现一个简单而准确的预测，ECC的机制表示的模糊模型使用固定裂纹的方法。这些模型的适用性证明通过ECC板和R/ECC面板响应的模拟。这表明了一个适当的剪切传递模型的重要性，在代表ECC的基本行为在各向异性领域。这些模型的预测，然后对剪切临界R/ECC梁的实验结果与M/Vd比为1.0和0.5进行了比较。对于梁的M/Vd比为1.0，观察到一个很好的协议，在滞回响应，裂纹图案，和故障机制。对于M/Vd比为0.5的梁，尽管该分析确实预测了正确的失效机制，但它在一定程度上低估了梁的承载力。总之，本文证明了非线性有限元分析ECC结构构件的实际应用是可能的。
This paper describes an attempt to predict the response of shear-critical ECC members that exhibit strong anisotropic stress and strain fields. The ECC members investigated include pre-cracked ECC plates under stress field rotation, orthogonally-reinforced ECC (R/ECC) panel under pure shear, and shear-critical R/ECC beams under reversed cyclic loading. To achieve a simple yet accurate prediction, the mechanics of the ECC are represented by smeared models using a fixed crack approach. The applicability of these models is demonstrated through a simulation of ECC plates and R/ECC panel responses. This demonstrates the importance of an appropriate shear transfer model in representing essential behaviors of ECC in an anisotropic field. Predictions of these models were then compared against experimental results of shear-critical R/ECC beams with a M/Vd ratio of 1.0 and 0.5. For beams with a M/Vd ratio of 1.0, a good agreement is observed in terms of hysteretic response, crack pattern, and failure mechanisms. For beams with a 0.5 M/Vd ratio, the analysis somewhat underestimates the beam capacity, although it does predict a correct failure mechanism. Overall, this paper demonstrates that practical application of nonlinear finite-element analysis to ECC structural members is possible.