Crescent-Moon Beam-To-Column Connection for Precast Industrial Buildings

Bressanelli, Michele Egidio; Bosio, Marco; Belleri, Andrea; Riva, Paolo; Biagiotti, Piergiovanni

doi:10.3389/fbuil.2021.645497

Cited by 8 publications

(2 citation statements)

References 27 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The seismic displacement demand of the considered building typology could be reduced by placing additional mechanical devices at the beam-to-column joint for both new and existing buildings (Martinez Rueda 2002;Martinelli and Mulas 2010;Plumier 2007;Belleri et al 2017b;Pollini et al 2020;Francavilla et al 2020;Bressanelli et al 2021). The provision of additional devices is compatible with the dry-assembly construction system, being the devices put in place at the end of the erection sequence.…”

Section: Introductionmentioning

confidence: 99%

Displacement-based design of precast hinged portal frames with additional dissipating devices at beam-to-column joints

Belleri

Labò

2021

Bull Earthquake Eng

Self Cite

View full text Add to dashboard Cite

The seismic performance of precast portal frames typical of the industrial and commercial sector could be generally improved by providing additional mechanical devices at the beam-to-column joint. Such devices could provide an additional degree of fixity and energy dissipation in a joint generally characterized by a dry hinged connection, adopted to speed-up the construction phase. Another advantage of placing additional devices at the beam-to-column joint is the possibility to act as a fuse, concentrating the seismic damage on few sacrificial and replaceable elements. A procedure to design precast portal frames adopting additional devices is provided herein. The procedure moves from the Displacement-Based Design methodology proposed by M.J.N. Priestley, and it is applicable for both the design of new structures and the retrofit of existing ones. After the derivation of the required analytical formulations, the procedure is applied to select the additional devices for a new and an existing structural system. The validation through non-linear time history analyses allows to highlight the advantages and drawbacks of the considered devices and to prove the effectiveness of the proposed design procedure.

show abstract

Section: Introductionmentioning

confidence: 99%

Displacement-based design of precast hinged portal frames with additional dissipating devices at beam-to-column joints

Belleri

Labò

2021

Bull Earthquake Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…To date, in Italy, the implementation of mechanical devices between the structural elements of precast buildings (e.g. column and beam at the beam-to-column support) is required for new buildings and new technological solution have been studied in recent years [18]; such a detailing was not common practice in the past. However, for low seismicity areas, the seismic retrofit of these connections may not be necessary, and it could be interesting to evaluate the level of safety achieved by simple friction; such an information would allow for instance the prioritization of the retrofit interventions.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Considerations on the Loss of Support for Precast Beam Elements

Minkada¹,

Labò²,

Marini³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

Self Cite

View full text Add to dashboard Cite

One of the main objectives to be achieved for the safety of industrial precast buildings with simple friction beam-to-column connections is the reduction of their relative displacement. This goal is generally achieved through a global strengthening of the building or by locally introducing mechanical connecting devices between the elements. However, for low seismicity areas, these interventions may not be required, and it could be interesting to evaluate the level of safety achieved by simple friction; such an information would allow for instance the prioritization of the retrofit interventions. This paper aims to establish criteria for evaluating the loss of support probability in existing precast buildings in the case of a seismic event. The behavior of the friction connection is evaluated through a simplified model that describes the behavior of a portal frame composed of two columns and one beam. The equations of motion are derived, and a parametric analysis is performed by investigating the influence of the geometry of the structural elements, the nonlinear behavior of the columns, and the friction coefficient used in the column-beam connections for varying horizontal and vertical seismic acceleration. The objective of the sensitivity analysis is to provide some preliminary considerations about the influence of the main parameters that characterize the existing precast structure on the loss of the support probability.

show abstract

Loss of support assessment for precast portal frames with friction connections and masonry infills

Labò

Minkada

Marini

et al. 2022

Bull Earthquake Eng

View full text Add to dashboard Cite

The loss of support of beam elements in Italian precast buildings is one of the main vulnerabilities recorded in past earthquakes. The reason for beam falling is due to the absence of adequate structural details in the beam-column joints, which were typically relying on friction for buildings located in regions previously classified as non-seismic prone. To guarantee the structural safety of the whole existing building stock, this collapse mechanism must be further investigated; in this regard, it could be interesting to evaluate the level of safety achieved by simple beam-column friction connections to allow, for instance, the prioritization of the retrofit interventions to guarantee a minimum level of safety in a wide range of structures. The paper investigates the influence of the parameters governing the beam-column relative displacements in the case of friction connections to establish criteria for evaluating the seismic loss of support probability in existing precast buildings. A simplified analytical model is introduced to describe single and double portal frames with and without the presence of stiff masonry infills. The influence of the epicentral distance on the results obtained is also preliminary addressed. Nonlinear time history analyses are carried out on a 2D finite element model to validate the effectiveness of the simplified model taking as reference a building that experienced the loss of support of a main beam during a past earthquake.

show abstract

Crescent-Moon Beam-To-Column Connection for Precast Industrial Buildings

Cited by 8 publications

References 27 publications

Displacement-based design of precast hinged portal frames with additional dissipating devices at beam-to-column joints

Displacement-based design of precast hinged portal frames with additional dissipating devices at beam-to-column joints

Preliminary Considerations on the Loss of Support for Precast Beam Elements

Loss of support assessment for precast portal frames with friction connections and masonry infills

Contact Info

Product

Resources

About