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首页> 外文会议>World conference on timber engineering >NUMERICAL MODELING STRATEGY FOR ANALYZING THE BEHAVIOR OF SHEAR CONNECTORS IN WOOD-CONCRETE COMPOSITE SYSTEMS
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NUMERICAL MODELING STRATEGY FOR ANALYZING THE BEHAVIOR OF SHEAR CONNECTORS IN WOOD-CONCRETE COMPOSITE SYSTEMS

机译：木材-混凝土复合系统中剪切连接器性能的数值建模策略

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摘要

This article reports on an evaluation of the performance of dowel-type shear connectors in composite timber-concrete test specimens by numerical simulation. A 3D finite element model that uses ANSYS software was proposed to simulate direct shear tests based on static and cyclic loading. The model assumes a nonlinear behavior for the three materials: timber, steel, and concrete. The three components of the composite (timber member, concrete member and steel connector) were modeled jointly considering 1/2 of the geometry of the test specimens. The interaction among the elements was modeled using contact elements. The most important properties of the composite behavior of the timber-concrete structure were identified. The proposed model was used to estimate the load-slip curve and to analyze important phenomena of the mechanical behavior of connectors that are usually difficult to evaluate through tests, such as the distribution of stresses. The numerical results for the load-slip curve were in good agreement with the shear test results, for which an error of up to 15% was obtained. The numerical results also indicated that, under service loads, the loss of stiffness of the composite system was due to accumulated damage in the wood, mainly in the areas of the connections.
机译：本文报告了通过数值模拟评估销钉式剪切连接器在复合木材-混凝土试样中的性能。提出了使用ANSYS软件的3D有限元模型，以模拟基于静载荷和循环载荷的直接剪切试验。该模型假设三种材料的非线性行为：木材，钢材和混凝土。考虑到试样几何尺寸的1/2，对复合材料的三个组成部分（木材构件，混凝土构件和钢连接器）进行了建模。元素之间的交互使用接触元素进行建模。确定了木材-混凝土结构复合行为的最重要特性。所提出的模型用于估计负载滑移曲线并分析连接器机械性能的重要现象，而这些现象通常很难通过测试来评估，例如应力分布。载荷-滑动曲线的数值结果与剪切试验结果吻合良好，其误差高达15％。数值结果还表明，在使用载荷下，复合材料系统刚度的损失是由于木材中累积的损坏所致，主要是在连接区域。

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