Finite-Element Model for Nailed Wood Joints under Reversed Cyclic Load
Finite-Element Model for Nailed Wood Joints under Reversed Cyclic Load
复制标题
反向循环载荷下钉接木节点的有限元模型
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
Lei Jiang
中科院分区：
文献类型：
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作者：
Y. Chui;C. Ni;Lei Jiang
本文建立了单剪钉木节点在反向循环荷载作用下的荷载-滑移响应非线性有限元模型。特别令人感兴趣的是荷载-滑移响应的屈服后区域，在此区域，钉的变形很大。在提出的理论中，钉子使用有限梁单元近似建模，该近似包含了材料的大变形和应力-应变行为的滞后性的影响。通过作者开发的迟滞模型描述了木材在钉子作用下的嵌入行为。此外，在模型中还考虑了钉的剪切变形和钉与木之间的摩擦的影响。给出了表征木材嵌入行为的材料试验结果和钉材的应力-应变曲线，以及验证有限元模型的联合试验结果。试验数据与模型预测结果的对比验证了模型的有效性。
This paper presents a nonlinear finite-element model for predicting the load-slip response of a single-shear nailed wood joint under reversed cyclic loading. Of particular interest is the post-yielding region of the load-slip response at which the deformation of the nail is large. In the proposed theory, the nail is modeled using a finite beam element approximation that incorporates the effects of large deformation and hysteretic nature of the stress-strain behavior of the material. The embedment behavior of wood under the action of a nail is described through a hysteresis model developed by the writers. In addition the effects of shear deformation in the nail and friction between nail and wood are incorporated into the model. Results from material tests conducted to characterize the embedment behavior of wood and stress-strain curve of nail material, and from joint tests to verify the finite-element model, are presented. A comparison of test data with model predictions demonstrates the validity of the mo...