Wood Material Science & Engineering ( IF 2.2 ) Pub Date : 2019-07-23 , DOI: 10.1080/17480272.2019.1645206 José Manuel Cabrero 1 , Dániel Honfi 2 , Robert Jockwer 3 , Miguel Yurrita 1
Dowel-type connections in timber structures should be typically designed in a way that, if the load bearing capacity is exceeded, desirable ductile failure should likely occur, i.e. yielding of the metal dowel or embedment of the timber. However, the probability of brittle failures cannot be completely avoided in many cases. If the connection is loaded parallel to the grain direction, splitting, row-shear, plug/block shear and tensile failure are examples of such brittle failure modes. To ensure a beneficial structural performance locally and sufficient structural robustness globally, the probability of such brittle failures should be kept at a sufficiently low level. However, in the current version of EN1995, the probability of such failure is not considered explicitly. The final aim of the presented research study is to develop a rational approach for the consideration of brittle failure in timber connections with dowel-type fasteners and steel plates loaded parallel to the grain, consistently with the partial factor method. As a first step, a probabilistic model has been used to study the susceptibility to brittle failure and provide a rational basis for the calibration of a “brittle overstrength factor”. The results of this study are reported in the current contribution.
中文翻译:
平行于谷物加载钢板的销钉式木材连接中的脆性破坏概率研究
木材结构中的销钉型连接通常应采用以下方式设计:如果超过了承重能力,则可能会发生理想的延性破坏,即金属销钉的屈服或木材的嵌入。但是,在许多情况下无法完全避免出现脆性故障的可能性。如果连接方向平行于晶粒方向,则裂口,行剪切,塞/块剪切和拉伸破坏就是这种脆性破坏模式的例子。为了确保局部具有有益的结构性能并在全球范围内确保足够的结构坚固性,应将此类脆性破坏的可能性保持在足够低的水平。但是,在当前版本的EN1995中,没有明确考虑这种故障的可能性。本研究的最终目的是开发一种合理的方法,以考虑与销钉式紧固件和平行于谷物加载的钢板的木材连接中的脆性破坏,这与偏因法一致。第一步,使用概率模型研究脆性破坏的敏感性,并为“脆性超强度因子”的校准提供合理的依据。这项研究的结果报告在当前的贡献中。一个概率模型已被用于研究脆性破坏的敏感性,并为“脆性超强度因子”的校准提供了合理的基础。这项研究的结果报告在当前的贡献中。一个概率模型已被用于研究脆性破坏的敏感性,并为“脆性超强度因子”的校准提供了合理的基础。这项研究的结果报告在当前的贡献中。