Inelastic cyclic response of RBS connections with jumbo sections

Bompa, D.V.; Elghazouli, A.Y.; Bogdan, Teodora; Eatherton, Matthew R.; Leon, Roberto T.

doi:10.1016/j.engstruct.2023.115758

Cited by 7 publications

(2 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A full floor model was created based on previous literature and the number of connectors gradually reduced while representative models were used [1]. The mesh seed was the same for both beam and shell elements with coincident nodes as connectors, ensuring convergence in composite/hybrid modelling [20,21].…”

Section: Connections Modellingmentioning

confidence: 99%

Numerical investigation of lateral behaviour of steel‐timber hybrid frames

Offerman,

Bompa

2023

ce papers

View full text Add to dashboard Cite

This paper examines the response of steel‐timber hybrid (STH) lateral stability systems for medium‐rise buildings. A ten‐storey baseline STH structure was designed to codified procedures and compared with a steel‐concrete composite structure. Detailed numerical models were constructed in which specific constitutive representations were assigned to steel‐timber and timber‐timber connections. Parametric investigations on the STH structure were carried out in which the cross laminated timber panel layups, timber shear wall length, and connection characteristics were modified. The study indicated that the STH structure had larger lateral deformations compared to the steel‐concrete structure, both within code limits. For the same design loads, the reduction in self‐weight from the steel‐concrete structure to the STH structure was 73.1%, whilst the floor depth was reduced by 17.2%, respectively. Parametric studies showed that the lateral response of STHs is generally improved with the effective thickness of the timber infill panel and is influenced by the panel layup. Increasing the shear wall length generally enhances the lateral stiffness, yet the overall performance is reduced with the increase of panel connections. The reduction in self‐weight, member sizes and replacement of the concrete with timber led to a reduction in embodied carbon of more than 32.7% whilst achieving similar structural performance.

show abstract

Section: Connections Modellingmentioning

confidence: 99%

Numerical investigation of lateral behaviour of steel‐timber hybrid frames

Offerman,

Bompa

2023

ce papers

View full text Add to dashboard Cite

show abstract

“…Empirical fragility curves showed that RWS connections had significantly lower probabilities of exceeding certain inter-story drifts and collapse compared to RBS connections. Bompa et al (2023) assessed the cyclic performance of reduced beam section (RBS) moment connections with larger member sizes than allowed by current seismic provisions. Results showed that connections with beam sections up to two times the limits exhibited a stable inelastic response, but very large beam sections showed significant hardening and increased susceptibility to weld fracture.…”

Section: Introductionmentioning

confidence: 99%

Numerical and analytical investigation of reduced beam section with and with yielding damper and their comparison

TahamouliRoudsari

Cheraghi

2023

Preprint

View full text Add to dashboard Cite

Connections are one of the sensitive points in structures, including steel structures, which have a significant impact on the seismic behavior of the structure. One type of connection used in steel structures is the Reduced Beam Section (RBS), which reduces the moment strength of the beam near the column, resulting in less moment being transferred to the column at the final moment. In this research, 36 numerical analyses were performed using ABAQUS to investigate two cases. In the first case, a connection with a beam with a hole in the flange area was examined, with the area of the flange holes and the axial force of the column as variables. In the second case, a yield ring was used in the flange area of the beam, with the radius of the yield ring as the variable in six cases. Analytical formulas for calculating the maximum strength moment of the beam, as well as equations for analysis in the linear region, were presented. One design requirement of the yielding damper is to yield earlier than other members, and an equation was presented to ensure that yielding occurs first in the yielding loop. After performing the numerical analysis, it was observed that if the area of the flange holes is half of the area of the beam flanges, a significant decrease in strength does not occur with an increase in axial force up to a certain extent. One of the primary advantages of adding a yielding damper to the beam is the ability to adjust the maximum moment transferred to the column by changing the final moment of the beam.

show abstract

Analytical and numerical investigation of the seismic behavior of tubular web reduced beam section connections

Ekhveh,

Mirghaderi,

Kavei

et al. 2024

Structural Design Tall Build

View full text Add to dashboard Cite

The reduced beam section (RBS) connections in steel structures are widely used to achieve sufficient ductility and avoid creating brittle failures in moment‐resisting frames. Compared to other types of connections, conventional RBS connections have the potential to reduce moment capacity and induce larger lateral deformation in the structure. In order to resolve this problem, novel forms of RBS connections have been proposed in recent years, such as tubular web RBS connections, which have shown a desirable performance under various loading conditions in previous studies. Therefore, this study conducted an analytic and numerical investigation of this connection under seismic loading. In this regard, the first step is to introduce the analytic equations related to the structural properties and stability of the reduced beam with the tubular web. Using these equations, a comprehensive procedure for the design of the tubular web RBS connections is presented. After that, a numerical model of the tubular web RBS connections is created and then analyzed under cyclic loading using the finite element method in ABAQUS software. Based on the results of this simulation, the suggested connection meets the criteria of valid international standards and can be used in the special moment‐resisting frame. In order to assess the impact of using the proposed connection in moment‐resisting frames, the performance of two 2D moment‐resisting frames with this connection is studied. This study shows that the maximum percentage increase in relative displacement caused by using tubular web RBS connections is 1.68%, whereas this figure rises to 10.6% when conventional RBS connections are used. Therefore, the designers can use tubular web RBS connections instead of conventional RBS connections to increase the lateral stability of the structure and control its lateral deflection due to the seismic loadings without having to increase the dimensions of the frame elements.

show abstract

Inelastic cyclic response of RBS connections with jumbo sections

Cited by 7 publications

References 44 publications

Numerical investigation of lateral behaviour of steel‐timber hybrid frames

Numerical investigation of lateral behaviour of steel‐timber hybrid frames

Numerical and analytical investigation of reduced beam section with and with yielding damper and their comparison

Analytical and numerical investigation of the seismic behavior of tubular web reduced beam section connections

Contact Info

Product

Resources

About