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Enhanced N-V interaction domains for the design of CLT shear wall based on coupled connections models
Engineering Structures ( IF 5.6 ) Pub Date : 2021-01-16 , DOI: 10.1016/j.engstruct.2020.111607
Luca Franco , Luca Pozza , Anna Saetta , Diego Talledo

The present paper proposes some enhanced models, with different levels of accuracy, for the design of monolithic CLT shear wall based on the definition of reliable N-V interaction domain. The basic assumptions and the novelty aspects of the proposed models are presented. In particular, the adoption of an elastic-perfectly-plastic constitutive law for the timber instead of an elasto-brittle one and the accounting for the coupled axial-shear behavior of the connection elements to derive N-V interaction domains are critically discussed. Moreover, two different methods are adopted for the linearization procedure of the connection load-displacement response. Four of the proposed models are design oriented, two representing a lower bound (more suitable for practitioners), and two representing an upper bound. One more model is developed, which is research oriented and based on hybrid force-displacement approach. The reliability of the different models is investigated by means of numerical analyses exploiting the ultimate failure condition of the materials both in terms of strength and displacement capacity. Finally, the N-V domains for some CLT shear walls are presented and the impact of the different basic assumptions on the results are discussed in comparison with both experimental and numerical literature results.



中文翻译:

基于耦合连接模型的CLT剪力墙设计的增强型NV相互作用域

本文基于可靠的NV相互作用域的定义,为整体式CLT剪力墙的设计提出了一些精度不同的增强模型。提出了模型的基本假设和新颖性。特别是,批判性地讨论了对木材采用弹性-完全塑性本构定律,而不是对弹性脆性定律的解释,并解释了用于导出NV相互作用域的连接元件的轴向剪切耦合行为。此外,对连接载荷-位移响应的线性化过程采用了两种不同的方法。所提出的四个模型是面向设计的,两个代表下限(更适合从业人员),另外两个代表上限。开发了另一种模型 这是面向研究的,基于混合力-位移方法。通过数值分析来研究不同模型的可靠性,该数值分析利用了材料在强度和位移能力方面的最终破坏条件。最后,介绍了一些CLT剪力墙的NV域,并与实验和数字文献结果进行了比较,讨论了不同基本假设对结果的影响。

更新日期:2021-01-18
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