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首页> 外文期刊>Journal of materials in civil engineering >Computational Modeling of Laminated Veneer Bamboo Dowel Connections
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Computational Modeling of Laminated Veneer Bamboo Dowel Connections

机译：层积单板竹榫连接的计算建模

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摘要

Laminated veneer bamboo (LVB) is a relatively new building product made from layers of glued bamboo and used in applications similar to lumber. Few studies exist on its mechanical performance; in particular, its failure behavior in dowel-type connections. This study uses both experimental and numerical methods to shed light on the complex stress state of an LVB dowel connection when progressively loaded in compression parallel to grain. A 2D elastic, plane strain finite element model is developed for a 15.9-mm (5/8-in.)-diameter bolt with a bolt hole size of 17.5 mm (11/16 in.) following the associated ASTM standard for full-hole specimen protocol. Experimental tests are used to validate and calibrate the model. Results show that predominant failure occurs off-center of the bolt contact region where the shear stress-to-strength ratio governs. Tensile stress perpendicular to grain, often the primary cause of wood failure, is found to be an influential secondary cause of failure. In addition, a frictional contact analysis leads to the finding that the coefficient of friction is a key factor in predicting shear stress.
机译：层积单板竹（LVB）是一种较新的建筑产品，由多层竹胶制成，用于类似于木材的应用中。对其机械性能的研究很少。尤其是销钉式连接中的故障行为。这项研究使用实验方法和数值方法，以渐进载荷平行于晶粒的方式，阐明了LVB销钉连接的复杂应力状态。针对相关直径为15.9毫米（5/8英寸），直径为17.5毫米（11/16英寸）的螺栓孔，开发了2D弹性平面应变有限元模型。孔标本协议。实验测试用于验证和校准模型。结果表明，主要的破坏发生在剪切力与强度之比决定的螺栓接触区域的偏心位置。垂直于谷物的拉伸应力通常是造成木材破坏的主要原因，是造成破坏的次要原因。另外，摩擦接触分析导致发现摩擦系数是预测剪切应力的关键因素。

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