Experimental Investigation on the Bending Strength and Stiffness of Wood considering Wood Defects

Within the research project “Mechanical properties of wood for fire design”, conducted at ETH Zurich, the Technical University of Munich, and TALTEC University, the thermomechanical properties of timber exposed to fire are investigated as the basis for revising the design methods in EN 1995-1-2. The project includes full-scale fire tests on timber members, numerical examinations, and small-scale experiments under elevated temperatures. The small-scale experiments aim to investigate whether a correlation exists between the behaviour of timber members exposed to fire and exposure to elevated temperatures without direct fire exposure.
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The following report focuses on the mechanical properties of timber, particularly in relation to wood defects, rather than the thermomechanical properties of timber exposed to fire. The following report provides within two series of experiments supplementary information regarding the investigation of the thermomechanical properties of timber exposed to elevated temperatures.

本研究项目为"面向防火设计的木材力学性能"，由苏黎世联邦理工学院（ETH Zurich）、慕尼黑工业大学（Technical University of Munich）与塔尔泰克大学（TALTEC University）联合开展，旨在探究受火木材的热机械性能，以此作为修订EN 1995-1-2中设计方法的依据。该项目涵盖木结构构件足尺受火试验、数值分析研究以及高温环境下的小型试验。本次小型试验旨在探究受火木材构件的力学行为，与无直接受火的高温暴露环境下的木材行为之间是否存在相关性。<br>本报告聚焦于木材的力学性能（尤其涉及木材缺陷相关内容），而非受火木材的热机械性能。本报告依托两组试验，为高温暴露下木材热机械性能的相关研究提供补充信息。