Abstract
Cross-laminated timber (CLT) buildings are recognized as a robust alternative to heavyweight constructions, because beneficial for seismic resistance and environmental sustainability, more than other construction materials. The lightness of material and the satisfactory dissipative response of the mechanical connections provide an excellent seismic response to multi-story CLT buildings, in spite of permanent damage to timber panels in the connection zones. Basically, CLT constructions are highly sustainable structures from extraction of raw material, to manufacturing process, up to usage, disposal and recycling. With respect to other constructions, the potential of CLT buildings is that their environmental sustainability in the phases of disposal and/or recycling can be further enhanced if the seismic damage in structural timber components is reduced or nullified. This paper reports a state-of-the art overview on seismic performance and sustainability aspects of CLT buildings in seismic prone regions. Technological issues and modelling approaches for traditional CLT buildings currently proposed in literature are discussed, focusing the attention on some research advancements and future trends devoted to enhance seismic performance and environmental sustainability of CLT buildings in seismic prone regions.
Highlights
Timber-based structures are gaining popularity in residential and non-residential constructions marked in the last two decades, in those countries not prone to the use of wood
This paper presents a state-of-the-art on the seismic behavior of traditional cross-laminated timber (CLT) buildings, focusing on the main research advancements aimed at enhancing both seismic performance and environmental sustainability
In the United States, specific properties of CLT products and their structural uses for buildings are included in the International Building Code [32] while for strength and fire resistance checks it refers to the National Design Specification (NDS) for Wood
Summary
Timber-based structures are gaining popularity in residential and non-residential constructions marked in the last two decades, in those countries not prone to the use of wood. The main advantages of CLT panels regard the structural features, thermal and sustainable aspects, as summarized in the following: In relation to their own-weight, CLT panels have a higher load-bearing capacity than most other construction materials: this means that high-rise buildings can be constructed with reduced masses. In the United States, specific properties of CLT products and their structural uses for buildings are included in the International Building Code [32] while for strength and fire resistance checks it refers to the National Design Specification (NDS) for Wood. Useful documents are the manuals released by FP-Innovation in Canada [11], the Swedish one [2] or that issued by proHolz-Austria in 2015 [36], all contain indications for the structural design and strength checks at ultimate and service limit states for CLT panels
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