Refined numerical modelling for the structural assessment of steel-concrete composite beam-to-column joints under seismic loads

Amadio, Claudio; Bedon, Chiara; Fasan, Marco; Pecce, Marisa

doi:10.1016/j.engstruct.2017.02.037

Cited by 82 publications

(46 citation statements)

References 25 publications

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“…The 'M0' model described in Section 2 was first assessed and validate towards the corresponding experimental test results, by taking into account the reference loading configurations proposed in Figure 3. As also in accordance with the earlier validation of the same FE numerical approach provided in [8], a rather close correlation was generally observed between the actual FE predictions and corresponding experimental measurements, hence suggesting further extension of the FE study for investigating the effect of slab-to-column interactions. For sake of brevity, a brief overview of comparative calculations is proposed in Section 3.2 (see Figure 10), for the specimen under gravitational loads (loading case (c) of Figure 3).…”

Section: Discussion Of Finite Element Numerical Resultssupporting

confidence: 87%

“…A full 3D refined modelling approach was developed in the ABAQUS computer software [6], in accordance with [8], aiming to preliminary reproduce the actual geometrical an mechanical properties of the reference specimen of Figure 1. After validation of FE assumptions, in fact, the so calibrated FE model was further investigated by taking into account various geometrical configurations, including the effects of gravitational or seismic loads (see also Section 3).…”

Section: Fe Modelling Approachmentioning

confidence: 99%

“…In the case of steel members and elements, Von Mises elasto-plastic constitutive laws were defined, while the "concrete damaged plasticity" damage model was used for the concrete slab. Input parameters were defined and calibrated in accordance with [8].…”

Section: Materials Boundaries and Loadingmentioning

confidence: 99%

“…In this regard, it is thus necessary to fully understand the influence of the joint components interactions to properly assess their global response (see for example [3][4][5]). To this end, in this paper a refined Finite Element (FE) model representative of a hinged beam-tocolumn joint in a braced frame is implemented in the ABAQUS computer software [6] and preliminary validated towards earlier research efforts and experimental results [7,8]. A full 3D solid modelling approach is taken into account, giving careful consideration for the geometrical and mechanical properties of each joint component, as well as for the corresponding contact interactions, and including properly calibrated damage material models.…”

Section: Introduction and Research Objectivesmentioning

confidence: 99%

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08.25: The influence of the concrete slab on the behaviour of steel‐concrete composite joints for braced frames

2017

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In current practice, the design of seismic resistant steel-concrete composite braced frames generally aims to ensure a structural behaviour for beam-to-column joints as close as possible to perfect hinges, hence preventing any kind of interaction with the bracing system. The global performance of steel-concrete composite joints, on the other hand, is markedly affected by the structural interaction between the concrete slab and all the steel components at the beam-to-column intersection. This is especially true during seismic events, when compression forces can typically arise in the concrete slab in the vicinity of the column, leading to the occurrence of struts in contact with the column itself. As such, for appropriate design assumptions, it is thus necessary to fully understand the influence of the joint components interactions. To this aim, in this paper a refined Finite Element (FE) model representative of a hinged beam-tocolumn joint in a braced frame is implemented in the ABAQUS computer software and validated with experimental results. A full 3D solid modelling approach is first taken into account, with careful consideration for the geometrical and mechanical properties of each joint component, as well as for the corresponding contact interactions, including properly calibrated damage material models. After a preliminary validation of the FE modelling approach carried out towards earlier full-scale experimental tests, a parametric FE study is proposed. By taking into account four different geometrical configurations for a reference steel-concrete composite joint, in particular, being characterized by (i) absence of slab, (ii) presence of slab with partial interaction with the column (i.e. isolated slab), (iii) presence of slab with interaction (even with small gap on one side) and (iv) fully interacting slab, major FE outcomes are critically discussed. It is shown, in this regard, that the isolation of the slab is typically associated to important effects on the structural performance of the joint itself, compared to a fully interacting concrete slab.

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Section: Discussion Of Finite Element Numerical Resultssupporting

confidence: 87%

Section: Fe Modelling Approachmentioning

confidence: 99%

Section: Materials Boundaries and Loadingmentioning

confidence: 99%

Section: Introduction and Research Objectivesmentioning

confidence: 99%

See 2 more Smart Citations

08.25: The influence of the concrete slab on the behaviour of steel‐concrete composite joints for braced frames

2017

Self Cite

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“…It is known that the numerical simulation is another effective approach to investigate the seismic performance of structures, and significant progress has been made in the development of nonlinear analysis programs for evaluating the seismic performance of steel-concrete hybrid structures [17][18][19][20][21]. Accordingly, on the basis of experimental results, the numerical investigation on the seismic performance of this hybrid structure was conducted in this study.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Seismic Performance of a Steel–Concrete Hybrid Supporting Structure in Thermal Power Plants

2018

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This paper presents the numerical investigation on the seismic performance of a steel-concrete hybrid structure consisting of reinforced concrete (RC) tubular columns and steel braced truss with A-shaped steel frames, which is a novel supporting structural system to house air-cooled condensers (ACC) in large-capacity thermal power plants (TPPs). First, the finite element (FE) modeling approach for this hybrid structure using the software ABAQUS was validated by a range of pseudo-dynamic tests (PDTs) performed on a 1/8-scaled sub-structure. The failure process, lateral displacement responses, changing rules of dynamic characteristic parameters and lateral stiffness with increase of peak ground acceleration (PGA) were presented here. Then, nonlinear time-history analysis of the prototype structure was carried out. The dynamic characteristics, base shear force, lateral deformation capacity, stiffness deterioration and damage characteristics were investigated. Despite the structural complexity and irregularity, both experimental and numerical results indicate that the overall seismic performance of this steel-concrete hybrid supporting structure meets the seismic design requirements with respect to the high-intensity earthquakes.

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Numerical simulation of substandard beam‐column joints with different failure mechanisms

Yurdakul

Vecchio

Ludovico

et al. 2020

Structural Concrete

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Generating the nonlinear behavior of substandard beam‐column joints is challenging. Difficulties arise even more in reproducing the contribution of different nonlinear mechanisms (and their mutual effects) on the global cyclic response. This paper deals with the advanced numerical modeling of substandard reinforced concrete (RC) beam‐column joints designed with structural details and material properties non‐conforming to current seismic codes. Refined numerical models developed in VecTor2 and ATENA Science finite element (FE) software are investigated in detail to identify the factors affecting the global and local joint response. Two different modeling strategies are closely compared with experimental results of joint subassemblies with different failure modes in terms of hysteric response, crack pattern and its development, and local deformations at the joint panel and framing members. The advantages‐disadvantages, difficulties in implementing the numerical model and their capability to reproduce the experimental behavior are discussed in detail. The comparison against experimental results in terms of local and global response is useful to assess the accuracy of the proposed models and it provides details on their applicability.

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Refined numerical modelling for the structural assessment of steel-concrete composite beam-to-column joints under seismic loads

Cited by 82 publications

References 25 publications

08.25: The influence of the concrete slab on the behaviour of steel‐concrete composite joints for braced frames

08.25: The influence of the concrete slab on the behaviour of steel‐concrete composite joints for braced frames

Numerical Study on the Seismic Performance of a Steel–Concrete Hybrid Supporting Structure in Thermal Power Plants

Numerical simulation of substandard beam‐column joints with different failure mechanisms

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