Finite-Element Modeling of Timber Joints with Punched Metal Plate Fasteners
Finite-Element Modeling of Timber Joints with Punched Metal Plate Fasteners
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DOI：
10.1061/(asce)0733-9445(2006)132:3(409
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发表时间：
2006-03
期刊：
影响因子：
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通讯作者：
P. Ellegaard
中科院分区：
文献类型：
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作者：
P. Ellegaard
本文的重点是描述的想法和理论背后的有限元模型开发的分析木桁架冲压金属板紧固件（钉板）。有限元模型包括节点的半刚性和非线性行为（非线性钉板单元）和木梁之间的接触（如果有的话）（双线性接触单元）。木梁具有线弹性特性。节点设计所需的截面力直接由有限元模型给出，因为使用了特殊的单元来模拟钉组和节点线上的钉板区域。有限元模型是基于Foschi模型，但有进一步的改进。在描述了该模型的理论之后，将两种钉板节点的实验测试结果与该模型给出的预测结果进行了比较。该模型在较低的载荷水平下很好地估计了接头的行为。在更高的负荷水平的刚度被高估，由于在木材和线性弹性木材属性的有限元模型中的裂纹的发展。
The focus of this paper is to describe the idea and the theory behind a finite-element model developed for analysis of timber trusses with punched metal plate fasteners (nail plates). The finite-element model includes the semirigid and nonlinear behavior of the joints (nonlinear nail and plate elements) and contact between timber beams, if any (bilinear contact elements). The timber beams have linear-elastic properties. The section forces needed for design of the joints are given directly by the finite-element model, since special elements are used to model the nail groups and the nail plate area over the joint lines. The finite-element model is based on the Foschi model, but with further improvements. After the theory of the model is described, results from experimental tests with two types of nail plate joints are compared with predictions given by the model. The model estimates the behavior of the joints very well at lower load levels. At higher load levels the stiffness is overestimated due to development of cracks in the timber and the linear-elastic timber properties in the finite-element model.