Parametric analyses and feasibility study of moment-resisting timber frames under service load

Vilguts, Aivars; Stamatopoulos, Haris; Malo, Kjell Arne

doi:10.1016/j.engstruct.2020.111583

Cited by 17 publications

(22 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As far as the timber structure is concerned, when it is designed as a moment‐resisting frame, plasticity and energy dissipation are provided by connections, while timber members are designed to remain elastic. In this case, connections stiffness 53,54 . plays a crucial role in structural response assessment.…”

Section: Methodsmentioning

confidence: 99%

“…In the case study, however, the adopted lateral resisting system is a concentric braced frame, where lateral forces are almost exclusively born by the braces. Figure 2C shows the beam to column connection adopted in this work: its stiffness is lower than 2 MNm that is negligible when compared to the bending stiffness of the adjoining timber members and also much lower than typical values for the case of deformable beam to column connection 53 . For these reasons, the beam to column connections are modeled as pinned, braces are considered to resist the entire lateral load and timber members are elastic by design.…”

Section: Methodsmentioning

confidence: 99%

“…In this case, connections stiffness. 53,54 plays a crucial role in structural response assessment. In the case study, however, the adopted lateral resisting system is a concentric braced frame, where lateral forces are almost exclusively born by the braces.…”

Section: Structural Modelmentioning

confidence: 99%

See 2 more Smart Citations

Risk‐based optimization of concentrically braced tall timber buildings: Derivative free optimization algorithm

Laguardia,

Franchin,

Tesfamariam

2023

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Mass timber materials are attractive alternatives for tall‐timber buildings (TBs), where the need for sustainability is apparent. Innovative structural systems and design methodologies are needed to fulfil performance requirements according to modern performance based approaches. This paper deals with the design and optimization of buckling restrained braces as earthquake protection system for tall‐TBs through risk‐based design procedure. This procedure controls the mean annual frequency of exceedance of several limit states evaluated through a SAC‐FEMA approach and using response spectrum linear analyses on linearized models for demand assessment. The features of the optimization procedure and the linearized models are shown through an application on a 20‐story mass‐TB located in a high seismic zone. The optimization is executed through a derivative‐free algorithm, the generalized pattern Search, adopting several solution strategies whose efficiency and effectiveness for this kind of applications are shown and discussed. Finally, the results are compared and validated through the execution of non‐linear analyses within a multiple stripe framework.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Risk‐based optimization of concentrically braced tall timber buildings: Derivative free optimization algorithm

Laguardia,

Franchin,

Tesfamariam

2023

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

show abstract

“…In general, ductile connections have improved the mechanical parameters of the frame, increasing the ultimate load and Ref. [21] evaluated the feasibility and the limitations of moment-resisting timber frames under service load according to current regulations. The main parameters that influence the overall serviceability performance of the of this kind of structure are the rotational stiffness of beam-to-column and column-to-foundation connections, story number and height, number and length of bays, column cross-section dimensions, and spacing between frames.…”

Section: Performance Of Moment-resisting Joints In Timber Framesmentioning

confidence: 99%

“…Within the moment-resisting timber frames system, without bracing or shear walls, the rotational stiffness of the joints is crucial, as we are dealing with statically indeterminate structures, and the internal forces redistribution is controlled by the ductility ensured by connections. For example, in the case of a multi-story moment-resisting timber frame structure, to fulfil the stated service limit requirements due to lateral deflections and accelerations induced by wind loads, the connections must have a minimum rotational stiffness [21].…”

Section: Challengesmentioning

confidence: 99%

Ductile Moment-Resisting Timber Connections: A Review

et al. 2022

View full text Add to dashboard Cite

In the last two decades, high-rise timber buildings have been built using the glulam truss system, even with limited openings. Moment-resisting timber frames (MRTF) with semi-rigid beam-to-column connections can be an architecture-friendly way to provide a load-carrying system to vertical and horizontal loads for timber buildings. In these structures, connections of adequate ductility are crucial to ensure robustness and energy dissipation. This paper presents a review of the main types of timber beam–column moment connections with improved ductility and proposes to carry out a ductility assessment of these connections based on the most relevant ductility factors. Joints have a significant influence on the global performance of MRTF, and the application of ductile connections have improved the mechanical parameters of the timber frame. The reinforced bolted slotted-in steel plate and glued-in rods connections have similar mechanical performance, with high rotation capacity and good ultimate moment, but exhibited different failure modes under cyclic loading. The connections were classified within ductility classes. In general, the glued-in steel rods presented better results because of the high influence of steel profiles in the connection yielding. Despite the excellent mechanical behavior, the reinforced bolted slotted-in steel plate connections presented medium ductility values.

show abstract

A study on beam-to-column moment-resisting timber connections under service load, comparing full-scale connection testing and mock-up frame assembly

et al. 2022

View full text Add to dashboard Cite

A new timber frame structural system consisting of continuous columns, prefabricated hollow box timber decks and beam-to-column moment-resisting connections is investigated. The hollow box timber decks allow long spans with competitive floor height and efficient material consumption. To achieve long spans, semi-rigid connections at the corners of deck elements are used to join the columns to the deck elements. In the present paper, experimental investigations of a semi-rigid moment-resisting connection and a mock-up frame assembly are presented. The semi-rigid connection consists of inclined screwed-in threaded rods and steel coupling parts, connected with friction bolts. Full-scale moment-resisting timber connections were tested under monotonic and cyclic loading to quantify rotational stiffness, energy dissipation and moment resistance. The mock-up frame assembly was tested under cyclic lateral loading and with experimental modal analysis. The lateral stiffness, energy dissipation, rotational stiffness of the connections and the eigen frequencies of the mock-up frame assembly were quantified based on the experimental tests in combination with a Finite Element model, i.e., the model was validated with experimental results from the rotational stiffness tests of the beam-to-column connections. Finally, the structural damping measured with experimental modal analysis was evaluated and compared with FE model using the material damping of timber parts and equivalent viscous damping of the moment-resisting connections.

show abstract

Parametric analyses and feasibility study of moment-resisting timber frames under service load

Cited by 17 publications

References 8 publications

Risk‐based optimization of concentrically braced tall timber buildings: Derivative free optimization algorithm

Risk‐based optimization of concentrically braced tall timber buildings: Derivative free optimization algorithm

Ductile Moment-Resisting Timber Connections: A Review

A study on beam-to-column moment-resisting timber connections under service load, comparing full-scale connection testing and mock-up frame assembly

Contact Info

Product

Resources

About