Experimental collapse response of post-and-beam mass timber frames under a quasi-static column removal scenario

Lyu, Chunhao; Gilbert, Benoit P.; Guan, Hong; Underhill, Ian D.; Gunalan, Shanmuganathan; Masaeli, Mahyar

doi:10.1016/j.engstruct.2020.110562

Cited by 25 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under catenary action, the floors are subjected to combined bending and tension and therefore understanding of the effect of such combined loading on mass timber connections is instrumental for effective modelling and performancebased design. To date some early experimental work has been performed at a substructure level [8,9], but empirical data is lacking on the behaviour of variety of connections and types of engineered wood products used in practice.…”

Section: Catenary Action In Mass Timbermentioning

confidence: 99%

Experimental and Numerical Analysis of CLT Floor Subassemblies Under Catenary Action

Przystup,

Tannert,

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

View full text Add to dashboard Cite

Behaviour under combined axial tension and out-of-plane bending, typically observed in catenary action after loss of a support, was investigated on Cross Laminated Timber (CLT) floors. Uni-axial tension tests as well as combined tension and bending tests on CLT component and floor subassembly levels with screw butt joints and varying boundary conditions were performed. Bending moment capacity was shown to decrease with increasing of horizontal tension on the connection. Combined loading failure envelope was developed to observe a correlation between the test results of different scale, showing the potential of using component tests as predictors of the behaviour of more complex subassemblies.

show abstract

Section: Catenary Action In Mass Timbermentioning

confidence: 99%

Experimental and Numerical Analysis of CLT Floor Subassemblies Under Catenary Action

Przystup,

Tannert,

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

View full text Add to dashboard Cite

show abstract

“…Currently available doweltype connectors do not allow for large deformations of beam or floors, e.g. tests of timber post-and-beam systems found that conventional connectors failed prematurely and could not develop catenary action; however, a double slotted-in steel plate connector, with elongated holes to allow joint rotation, was able to develop catenary action [4]. Support-removal tests in [5] on lap-jointed solid timber floors and walls in platform-type construction, including CLT floors, found that conventional screw connections were not able to develop catenary action.…”

Section: Floor Connectors and Catenary Actionmentioning

confidence: 99%

Application of a Tube Connector for Catenary Action in CLT Floors

Huber,

Huang,

Knutsen

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

View full text Add to dashboard Cite

Multi-storey buildings require provisions to avoid disproportionate consequences after unexpected events, e.g. explosions or human error during design and construction. To prevent failure progression in the structure after an initial damage (loss of load-carrying elements), alternative load paths, like catenary action, should be provided. Catenary action supports the sagging structure after element loss by transferring the loads horizontally to the adjacent elements; this mechanism requires the connections to remain ductile under high load. Conventional dowel-type connectors in timber structures have limited potential to develop catenary action in beams or floors. A previously developed tube connector exhibited desirable behaviour to develop catenary action in cross-laminated timber floors; however, the tube exhibited and undesirable failure mode. In the present study, the behaviour of a newly designed variant of the tube connector was experimentally investigated under catenary action. The new connector design was tested in varying configurations, at both the component level and full-scale floor level, in Canada and Sweden. The results show that a more desirable behaviour of the adapted connector could be achieved compared to the previous design, with respect to catenary action.

show abstract

“…As these buildings become taller, commonly reaching six storeys and more, the consequences of a potential progressive collapse event also significantly increase. Studying the progressive collapse of mass timber buildings is still a relatively new research topic, and the structural response of various types of mass timber buildings to resist such events has been researched so far, through experimental [5][6][7][8][9], analytical [10,11] or numerical [12][13][14][15] methods. However, the accuracy of the developed numerical models has not yet been verified against experimental tests, or only on component tests [15].…”

Section: Introduction 789mentioning

confidence: 99%

“…Such FE models have been widely used in reinforced concrete and steel structural systems [21][22][23][24][25][26][27][28] to gain in-depth understanding on the structural behaviour through parametric studies and identify the key factors affecting the ability of the structures to resist progressive collapse. Mass timber buildings differ from their concrete [29][30][31][32], steel [33][34][35] and composite-steel [36,37] counterparts, due to the lack of structural continuity (as built from prefabricated structural elements), the brittle failure mode of the material [38], and the typical lack of ductility of timber-to-timber connections [6,39]. These characteristics result in mass timber buildings deemed to have fewer possibilities to redistribute the load after the loss of a load bearing elements [19], outlining the necessity to develop an accurate model specific to mass timber buildings.…”

Section: Introduction 789mentioning

confidence: 99%

An Accurate Finite Element Model to Study the Progressive Collapse of Post-and-Beam Mass Timber Buildings

Lyu

Gilbert

Guan

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

View full text Add to dashboard Cite

The structural behaviour of mass timber buildings under the removal of a load bearing element is complex. To well understand this phenomenon and ultimately develop scientifically based design guidelines against progressive collapse for this type of buildings, there is a need to develop Finite Element models which accurately capture the nonlinear structural responses of such buildings. This paper presents how mass timber post-and-beam systems can be accurately modelled using Finite Element under edge and corner column removal scenarios. The model was validated against published 3D experimental tests performed on scaled-down substructures. Results show that the model accurately replicated non-linear behaviour, load redistribution mechanisms, ultimate loads, failure modes, and strain developments. The use of the model was then illustrated by running parametric studies to quantify (i) the influence of the Cross Laminated Timber (CLT) floor panels layout and (ii) one alternative load path, typically ignored in design, on the progressive collapse resistance capacity.

show abstract

Experimental collapse response of post-and-beam mass timber frames under a quasi-static column removal scenario

Cited by 25 publications

References 34 publications

Experimental and Numerical Analysis of CLT Floor Subassemblies Under Catenary Action

Experimental and Numerical Analysis of CLT Floor Subassemblies Under Catenary Action

Application of a Tube Connector for Catenary Action in CLT Floors

An Accurate Finite Element Model to Study the Progressive Collapse of Post-and-Beam Mass Timber Buildings

Contact Info

Product

Resources

About