Experimental and numerical assessment of steel beams under impact loadings

D’Antimo, Marina; Latour, Massimo; Rizzano, Gianvittorio; Demonceau, Jean-François

doi:10.1016/j.jcsr.2019.03.029

Cited by 43 publications

(17 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…( ) For dynamic loadings, the strain rate needs to be implemented in the model. From the results obtained in [17], the best way to account for strain rate in FEM modelling is using Johnson-Cook formulation given in Equation (4). Where the DIF is a function of the parameter C and the ratio between the plastic (̇) and the reference static strain rate ( 0 = 0.001).…”

Section: Finite Element Analysismentioning

confidence: 99%

“…These parameters are fixed according to the targeted impact energy during the test. The testing setup has been used and calibrated in a previous work, all the details are given in [17], where the impact was performed on simply supported beams. All the specimens are identified with an alphanumeric tag, as the one reported in Table 1, where the code is indicating (i) the type of test (IT for Impact Test), (ii) the joint configuration (FR for the joint type called "FREEDAM"), (iii) the number of the test (01, 02, etc.…”

Section: Performed Tests and Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Dissipative joints under impact loadings

D’Antimo¹,

Latour

Demonceau

2021

ce papers

View full text Add to dashboard Cite

Unforeseen and unpredictable exceptional events can lead to abnormal loading distribution in the structures; however, in such situation, structures have to withstand additional loadings to avoid disproportionate damage and progressive collapse. Impact loadings are among the exceptional events that a structure can experience during its lifetime. In order to give a contribution to the research on impulsive loading on structural joints, this work focuses on the behavior of slide hinge joints (SHJ) with a Symmetric Friction Damper (SFD) under drop weight impact tests. Six drop weight impact tests on a double‐sided beam‐to‐column joints were performed and a 3D finite element model was created and validated in ABAQUS/CAE Explicit. The model includes the calibration of material damage, correlating the equivalent plastic strain to the stress triaxiality, damping of the system, calibrated on elastic impact tests using Rayleigh's classical damping and strain rate sensitivity through the Johnson Cook model. Furthermore, a parametric analysis was performed in order to investigate the influence of three parameters on the joint behavior: the impact velocity, the impact mass and the impact energy. The energy is used to estimate the dissipation rate of the joint, which can be considered as a reliable parameter to quantify the joint behavior under drop weight impact.

show abstract

Section: Finite Element Analysismentioning

confidence: 99%

Section: Performed Tests and Measurementsmentioning

confidence: 99%

Dissipative joints under impact loadings

D’Antimo¹,

Latour

Demonceau

2021

ce papers

View full text Add to dashboard Cite

show abstract

“…Among others, cases with high relevance are the collapse of the Ronan Point Building (London, 1968) [7], of the Murrah Federal Building (Oklahoma City, 1995) [8] and the World Trade Center (New York, 2001) [9]. Since the 1940s, many research studies focused on this issue, investigating widely diverse aspects of the problem by performing components [e.g., 10,11,12,13] and large scale experimental tests [e.g., 14,15,16,17,18,19,20,21,22], numerical modelling and simulations [e.g., 23,24,25,26,27,28,29,30,31] and investigating several aspects of the design against progressive collapse [e.g., 32,33]. These studies allowed building up an increasingly understanding of the structural response in these scenarios and the definition of possible design strategies nowadays incorporated in design guidelines and codes [e.g., 34,35,36].…”

Section: Introductionmentioning

confidence: 99%

Retrofit of existing steel structures against progressive collapse through roof-truss

Freddi

Ciman

Tondini

2022

Journal of Constructional Steel Research

View full text Add to dashboard Cite

The paper presents the results of a comprehensive study on the evaluation of the effectiveness of a retrofit strategy of existing steel buildings against progressive collapse. In this respect, it investigates the performance and the design of a retrofit solution to increase the robustness of steel Moment Resisting Frame buildings. A truss steel system added at the building's rooftop level (i.e., 'roof-truss'), and intended to define an alternative load path, was investigated as a retrofit solution. The numerical model key components, including the plastic hinges and the beam-column connections, were validated against available experimental results. The validated models were then used to study the robustness of the structure under column loss scenarios by means of non-linear static and dynamic analyses performed in OpenSees. The simulations allowed for the identification of possible failure modes and alternative load paths together with the definition of the Dynamic Increase Factor (DIF). In this regard, it is shown that column buckling is critical for the selected case study. Moreover, the outcomes showed how the proposed retrofit solution allows the definition of effective alternative load paths when subjected to column loss scenarios and informs on the critical details that should be checked by employing this retrofit system.

show abstract

“…The results of laboratory and numerical investigations of dynamic response of beams to the impact of falling mass were carried out by D'Antimo et al [4]. They demonstrated the suitability of calculations for the purpose of estimating the dynamic characteristics of a steel structure.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Stiffness and Dynamic Properties of a Mine Shaft Steelwork Structure through In Situ Tests and Numerical Simulations

Jakubowski

Fiołek

2021

Energies

View full text Add to dashboard Cite

A mine shaft steelwork is a three-dimensional frame that directs the vertical motion of conveyances in mine shafts. Here, we conduct field and numerical investigations on the stiffness and dynamic properties of these structures. Based on the design documentation of the shaft, materials data, and site inspection, the steelwork’s finite element model, featuring material and geometric non-linearities, was developed in Abaqus. Static load tests of steelwork were carried out in an underground mine shaft. Numerical simulations reflecting the load test conditions showed strong agreement with the in situ measurements. The validated numerical model was used to assess the dynamic characteristics of the structure. Dynamic linear and non-linear analyses delivered the natural frequencies, mode shapes, and structural response to dynamic loads. The current practices and regulations regarding shaft steelwork design and maintenance do not account for the stiffness of guide-to-bunton connections and disregard dynamic factors. Our experimental and numerical investigations show that these connections provide considerable stiffness, which leads to the redistribution and reduction in bending moments and increased stiffness of the construction. The results also show a high dynamic amplification factor. The omission of these features implicates an incorrect assessment of the design loads and can lead to over- or under-sized structures and ultimately to shortened design working life or failure.

show abstract

Experimental and numerical assessment of steel beams under impact loadings

Cited by 43 publications

References 29 publications

Dissipative joints under impact loadings

Dissipative joints under impact loadings

Retrofit of existing steel structures against progressive collapse through roof-truss

Evaluation of Stiffness and Dynamic Properties of a Mine Shaft Steelwork Structure through In Situ Tests and Numerical Simulations

Contact Info

Product

Resources

About