Numerical Study of the Quasi-static Cyclic Behaviour of Blind-Bolted Connections

Maio 2022

This paper reports on a numerical study carried out to evaluate the quasi-static cyclic response of three endplate joints using hollo-bolts and non-concrete-filled tubular columns. The present research follows an experimental program involving monotonic tests of 22 specimens, covering different sets of connections and configurations. This study introduces a numerical prevision of the behaviour of the joints’ components when subjected to both tension and shear originated by a cyclic loading, indicating that without proper reinforcement, these joints cannot be used in zones with high seismicity, given their weakness. Numerical simulations using ANSYS software are compared against the experimental monotonic tests to ensure results concordance and reliability. The purpose of this paper is to present and discuss the numerical descriptions of the main response characteristics including hysteretic loops, stiffness and strength degradation, pinching effects, energy dissipation, among other structural properties. The models indicated that the HBM20 have sufficient mechanical strength, but the column’s plasticity is too large to ensure a proper dynamic response when large moments are applied. However, due to their fast assembly and aesthetical design, new solutions are being implemented to increase the strength and resistance of these joints in order to meet the earthquake design requirements. The most relevant components of these joints that increase their structural properties are also mentioned. These findings allow having a deeper understanding of the behaviour of these connections in seismic scenarios and the results serve as a basis for a future experimental campaign dedicated to evaluate the dynamics of non-concrete-filled blind-bolted connections.

Autores da comunidade :

• 

  A

  Afonso Guilherme Trindade Bonina de Mesquita

  ist197336

  Afiliações e fontes

  IST

  Instituto Superior Técnico

Springer

https://link.springer.com/chapter/10.1007/978-3-031-03811-2_21

Lecture Notes in Civil Engineering

Timisoara

262

10.1007/978-3-031-03811-2_21

civil-engineering - Engenharia Civil

eng - Inglês