Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading
Abstract
Long-span cross-laminated timber (CLT) floors are typically an assembly of prefabricated CLT panels connected together on the site. The actual connections are commonly neglected in design calculations. Hence, a CLT floor is modelled either as a monolith slab or more frequently as a set of CLT panels with no connections at all. This paper presents a numerical study designed to examine the influence of two most common inter-panel connections , i.e. single surface spline and half-lapped joint, on vibration modes and vibration responses of a range of different CLT floors due to pedestrian-induced loading. Although the inter-panel connections are relatively complex in reality, they are modelled here as an equivalent 2D elastic strip between the CLT panels. This relatively simple yet robust model can be used with ease in design practice, regardless finite element (FE) software used to extract vibration modes of a CLT floor. The corresponding monolith floors and floors without inter-panel con...nections are studied for the comparison of the results. Vertical vibration responses are simulated for low-frequency and high-frequency floors using the corresponding walking force models given in a popular design guideline for footfall induced vibrations of civil engineering structures. Vibration responses were calculated for single pedestrian occupants and their walking paths parallel and perpendicular to the line of connection. The results showed that including the inter-panel connections in a FE model resulted in up to 2.5 higher RMS acceleration levels. Hence, the common practice of modelling CLT floors as monolith slabs or as a set of panels without connections should be left behind.
Keywords:
cross-laminated timber / walking forces / human-induced vibrations / single surface spline / half-lapped jointSource:
Engineering Structures, 2023, 277Funding / projects:
Collections
Institution/Community
GraFarTY - JOUR AU - Milojević, Marija AU - Racić, Vitomir AU - Marjanović, Miroslav AU - Nefovska-Danilović, Marija PY - 2023 UR - https://grafar.grf.bg.ac.rs/handle/123456789/2923 AB - Long-span cross-laminated timber (CLT) floors are typically an assembly of prefabricated CLT panels connected together on the site. The actual connections are commonly neglected in design calculations. Hence, a CLT floor is modelled either as a monolith slab or more frequently as a set of CLT panels with no connections at all. This paper presents a numerical study designed to examine the influence of two most common inter-panel connections , i.e. single surface spline and half-lapped joint, on vibration modes and vibration responses of a range of different CLT floors due to pedestrian-induced loading. Although the inter-panel connections are relatively complex in reality, they are modelled here as an equivalent 2D elastic strip between the CLT panels. This relatively simple yet robust model can be used with ease in design practice, regardless finite element (FE) software used to extract vibration modes of a CLT floor. The corresponding monolith floors and floors without inter-panel connections are studied for the comparison of the results. Vertical vibration responses are simulated for low-frequency and high-frequency floors using the corresponding walking force models given in a popular design guideline for footfall induced vibrations of civil engineering structures. Vibration responses were calculated for single pedestrian occupants and their walking paths parallel and perpendicular to the line of connection. The results showed that including the inter-panel connections in a FE model resulted in up to 2.5 higher RMS acceleration levels. Hence, the common practice of modelling CLT floors as monolith slabs or as a set of panels without connections should be left behind. T2 - Engineering Structures T1 - Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading VL - 277 DO - 10.1016/j.engstruct.2022.115432 ER -
@article{ author = "Milojević, Marija and Racić, Vitomir and Marjanović, Miroslav and Nefovska-Danilović, Marija", year = "2023", abstract = "Long-span cross-laminated timber (CLT) floors are typically an assembly of prefabricated CLT panels connected together on the site. The actual connections are commonly neglected in design calculations. Hence, a CLT floor is modelled either as a monolith slab or more frequently as a set of CLT panels with no connections at all. This paper presents a numerical study designed to examine the influence of two most common inter-panel connections , i.e. single surface spline and half-lapped joint, on vibration modes and vibration responses of a range of different CLT floors due to pedestrian-induced loading. Although the inter-panel connections are relatively complex in reality, they are modelled here as an equivalent 2D elastic strip between the CLT panels. This relatively simple yet robust model can be used with ease in design practice, regardless finite element (FE) software used to extract vibration modes of a CLT floor. The corresponding monolith floors and floors without inter-panel connections are studied for the comparison of the results. Vertical vibration responses are simulated for low-frequency and high-frequency floors using the corresponding walking force models given in a popular design guideline for footfall induced vibrations of civil engineering structures. Vibration responses were calculated for single pedestrian occupants and their walking paths parallel and perpendicular to the line of connection. The results showed that including the inter-panel connections in a FE model resulted in up to 2.5 higher RMS acceleration levels. Hence, the common practice of modelling CLT floors as monolith slabs or as a set of panels without connections should be left behind.", journal = "Engineering Structures", title = "Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading", volume = "277", doi = "10.1016/j.engstruct.2022.115432" }
Milojević, M., Racić, V., Marjanović, M.,& Nefovska-Danilović, M.. (2023). Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading. in Engineering Structures, 277. https://doi.org/10.1016/j.engstruct.2022.115432
Milojević M, Racić V, Marjanović M, Nefovska-Danilović M. Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading. in Engineering Structures. 2023;277. doi:10.1016/j.engstruct.2022.115432 .
Milojević, Marija, Racić, Vitomir, Marjanović, Miroslav, Nefovska-Danilović, Marija, "Influence of inter-panel connections on vibration response of CLT floors due to pedestrian-induced loading" in Engineering Structures, 277 (2023), https://doi.org/10.1016/j.engstruct.2022.115432 . .