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Descripción
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| The construction system based on cross-laminated timber (CLT) panels is developing fast in recent years after its initial design in the 90s. The good behavior of the system to fire and seismic actions is facilitating its penetration in the building market for small and medium height buildings. CLT-based structural systems present good ductility and energy dissipation capacity. Energy dissipation is achieved through metal connections, as these elements work actively to provide strength, stiffness, stability and ductility. The objective of this study is to validate a linear numerical model of a multi-storey structure built with CLT panels and metal connectors in the case of seismic actions. For this, panels are considered as an orthotropic panel material with properties equivalent to those of its layers properties. Additionally, shear connections (brackets) are simulated as the rigidity that they contribute to the system. Tension connectors are represented by the rotational stiffness created when the panel rotates with a connector on one end and wood being compressed in the other. The software use for numerical simulation was RFEM 5.06 [1] The results of the simulation of a 3-storey structure tested at 1: 1 in the project SOFIE, allow concluding that the modeled rigidity is very close to real. However, the displacements obtained from Nocera Umbra, El Centro and Kobe seismic earthquake loads, scaled to peak ground acceleration of 0.15g, are close to those obtained in laboratory testing [2][3][4] (Figure 1). However, base shear show greater variation, reaching a maximum deviation of 60% with respect to the values obtained in the prototype tests. From the point of view of calculation this variation is always within safety values. It is concluded that the numerical method presented for linear dynamic analysis of CLT buildings is valid provided that the seismic load keep the structure in the elastic range. Future research should aim at modeling the behavior outside the elastic range, and in particular, deeping knowledge about the hysteretic behavior of the connections. | |
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Internacional
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Si |
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Nombre congreso
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CompWood 2017 |
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Tipo de participación
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960 |
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Lugar del congreso
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Viena |
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Revisores
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Si |
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ISBN o ISSN
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9783903024496 |
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DOI
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Fecha inicio congreso
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07/06/2017 |
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Fecha fin congreso
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09/06/2017 |
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Desde la página
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45 |
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Hasta la página
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45 |
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Título de las actas
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Computational methods in Wood mechanics for material properties to timber structures |