Felipe Piana Vendramell Ferreira

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• BEng MD PhD
• Professor at State University of Maringá

Cellular steel beams are primarily used to accommodate electrical and mechanical services within their structural depth, helping to reduce the floor-to-ceiling height in buildings. These beams are often tapered for various reasons, such as connecting members (e.g., beams) of different depths, adjusting stiffness in specific areas, or enhancing arch...

Steel beams with elliptically-based web openings have shown higher global shear resistance and increased flexural stiffness compared to those with circular web openings. However, the structural behaviour of steel-concrete composite beams with elliptically-based web openings has yet to be explored. This paper aims to investigate the web-post bucklin...

Steel-reinforced Ordinary Portland Cement (OPC) concrete is the predominant construction material; however, it faces critical challenges, notably steel corrosion and high CO₂ emissions from cement production. Recent research explores corrosion-resistant alternatives to steel and environmentally sustainable substitutes for OPC. Basalt Fiber Reinforc...

This paper evaluates the accuracy and reliability of laterally restrained cellular beams designed according to SCI P355, EN 1993-1-13, and AISC Design Guide 31 (DG31). The evaluations relied on extensive numerical data developed within the study using FE models validated against test results. The reliability analyses followed EN 1990 Annex D for bo...

Lateral-distortional buckling (LDB) is a critical failure mode for steel-concrete composite beams subjected to hogging moments. This study aims to assess the structural behavior of composite beams with periodically-spaced elliptically-based web openings (EBWO) under hogging moments. A finite element model is developed and validated using ABAQUS sof...

The use of steel-concrete composite cellular beams expands the options in civil construction projects, as it results in greater strength capacity when compared to components acting separately, as well as greater steel savings when compared to full-span beams. In this respect, it is interesting to study the influence of high-strength steel on the fa...

Adopting hybrid cellular I-sections can favor optimizing steel consumption, as the higher steel grade is localized only in the compression tee. In addition, continuous steel-concrete composite cellular beams allow the construction of longer spans due to the combination of higher bending stiffness of the cellular I-section and its connection with th...

The use of composite structures is increasing in the construction industry due to their higher load-bearing capacity, better structural fire performance, and more significant potential to provide optimized structural solutions, effectively creating synergies between structural materials. Steel-concrete composite cellular beams are a good option for...

Steel-reinforced Ordinary Portland Cement (OPC) concrete is the predominant construction material; however, it faces critical challenges, notably steel corrosion and high CO2 emissions from cement production. Recent research explores corrosion-resistant alternatives to steel and environmentally sustainable substitutes for OPC. Basalt Fibre Reinforc...

In this paper, a novel methodology is developed for the characterization of the capacity of rectangular-shaped concrete-filled steel tubes (CFSTs). In the scientific research field, of particular interest is the behavior of long CFST columns under eccentric compressive load. These conditions promote failure mechanisms involving global member buckli...

Accurate and reliable cellular steel beam resistance predictions are essential for economical and safe designs of steel-framed buildings with such beams. This paper proposes a new machine-learning (ML) model based on the natural gradient boosting (NGBoost) algorithm to predict probabilistic load-bearing capacities of laterally restrained cellular b...

The global shear capacity of steel–concrete composite downstand cellular beams with precast hollow-core units is an important calculation as it affects the span-to-depth ratios and the amount of material used, hence affecting the embodied CO2 calculation when designers are producing floor grids. This paper presents a reliable tool that can be used...

As vigas mistas de aço e concreto são uma eficiente solução estrutural para edifícios de múltiplos pavimentos, ao reduzir altura e peso próprio da edificação. Atualmente grande parte das pesquisas nessa área se utilizam da modelagem numérica como forma de aprimorar o conhecimento sobre o tema. Entretanto, há uma lacuna na análise de sensibilidade p...

A utilização de tubos de aço preenchidos com concreto na construção civil oferece vantagens significativas, como maior resistência, ductilidade e absorção de energia, em comparação com pilares de aço ou de concreto armado. O presente estudo tem como objetivo investigar o comportamento à compressão de pilares retangulares mistos preenchidos de concr...

The use of steel-concrete composite beams with web openings becomes an advantageous tool used to reduce the height of the floor, as the web openings allow the integration of hydraulic and electrical services. This study aims to investigate the web-post buckling resistance of steel-concrete composite beams with elliptically-based web openings. A fin...

A new cellular beam with sinusoidal shape of web openings, aka Angelina™, shows different behaviour in comparison with the standard beams with openings. It has its lateral-torsional buckling (LTB) resistance affected by residual stress in a more significant way than the beams with solid webs since the thin-walled plates are subject to the castellat...

Steel cellular beams present periodical circular web openings. The expansion of the cross-section increases the flexural stiffness without increasing steel consumption, and thus allows different applications for this structural element such as roofing, footbridges, purlins, floors, parking structures, offshores structures. Steel cellular beams guar...

The calculation of the global shear capacity of steel-concrete composite downstand cellular beams with precast hollow-core units is important as it affects the span to depth ratios and the amount of material used, hence affects the embodied CO2 calculation when designers are deciding on the floor grids. This paper presents a reliable tool that can...

This paper examines the vibration response of the steel-concrete composite Ultra Shallow Floor Beam (USFB ® ) flooring system which incorporates asymmetric steel perforated beams to accommodate the concrete floor slab within the depth of the flanges while allowing reinforcement and/or service ducts to pass through the web openings. This is a lightw...

Stainless steel has many advantages when used in structures, however, the initial cost is high. Hence, it is essential to develop reliable and accurate design methods that can optimize the material. As novel, reliable soft computation methods, machine learning provided more accurate predictions than analytical formulae and solved highly complex pro...

The use of periodical elliptically-based web (EBW) openings in high strength steel (HSS) beams has been increasingly popular in recent years mainly because of the high strength-to-weight ratio and the reduction in the floor height as a result of allowing different utility services to pass through the web openings. However, these sections are suscep...

This work shows the accuracy and feasibility of polynomial regression models for the ultimate hogging moment prediction of composite cellular beams utilizing different numbers of simulations. It discusses an attempt to reduce the number of samples in a finite element parametric study, which consists of using only the combination of extreme levels o...

In the last few years, there has been a significant increase in the utilization of Fiber Reinforced Polymer (FRP) materials as reinforcing elements in concrete structures due to their excellent properties. Unlike traditional steel rebars, FRP rebars do not rust, which helps to prevent degradation and deterioration of the concrete structure over tim...

There has been an increase in the use of high-strength steel in several countries, as they provide design lightweight structural members by satisfying environmental and economic issues. This paper aims to implement high-strength steels in the web-post buckling resistance equation, which was based on the truss model according to EUROCODE 3, presente...

Few studies have investigated the structural behavior of steel-concrete composite alveolar beams in hogging bending regions. Their resistance can be reached by lateral distortional buckling (LDB), coupling LDB and local failure modes, or limit states of cracking or crushing in the concrete slab. This case is characteristic of continuous or cantilev...

The use of circular hollow sections (CHS) have seen a large increase in usage in recent years mainly because of the distinctive mechanical properties and unique aesthetic appearance. The focus of this paper is the behaviour of cold-rolled CHS beam-columns made from normal and high strength steel, aiming to propose a design formula for predicting th...

The use of precast hollow-core slabs (PCHCS) in civil construction has been increasing due to the speed of execution and reduction in the weight of flooring systems. However, in the literature there are no studies that present a finite element model (FEM) to predict the load-slip relationship behavior of pushout tests, considering headed stud shear...

The present paper aims to assess steel-concrete composite cellular beams' elastic and inelastic behavior in hogging moment regions. The finite element model is developed via ABAQUS software. In the parametric study, the unrestrained length, I-section dimensions, loading conditions, and the key parameters of the cellular beams are varied. The elasti...

This paper presents a new approach that can enhance the rotational capacity of exposed base plate connections without degrading the initial stiffness or strength of the standard configuration. By inserting a steel sleeve with a designated geometry between the base plate and the anchor rod washer, the load path between the end plate and the rod can...

This paper aims to predict the flexural behavior of steel-concrete composite ultra-shallow floor beams (USFBs) with precast hollow-core slab (PCHCS). A finite element model based on tests is developed. A parametric study is conducted, and the influence of the geometric parameters is discussed. The finite element results were compared with stress bl...

This paper aims to propose an Artificial Neural Network (ANN) model that predicts accurately web-post buckling resistance and failure mode of steel beams with elliptically-based openings. A total of 4,344 and 5,400 geometrical models, were developed by finite element method (FEM) and used to train, validate and test the ANN model for the web-post r...

In this paper, the influence of the web-post geometric parameters on shear buckling resistance of perforated steel beams with previously proposed novel non-standard elliptically-based web openings is investigated. An economical and practical approach to estimate the web-post buckling resistance in accordance with EUROCODE 3 and the buckling resista...

An experimental study was developed to investigate the mechanisms responsible for the transfer of shear forces at the steel-concrete interface in slim floor beams with circular web openings and precast hollow core slab (PCHCS). For this purpose, four specimens were made and subjected to push-out test. The presence of the steel bar through the openi...

The present study aims to investigate the behavior of steel-concrete composite cellular beams subjected to hogging moment. A finite element model is developed and validated via ABAQUS software. The I-section dimensions, free span, hogging moment distribution, and the key geometric parameters of cellular beams such as the opening diameter and web po...

The present paper aims to develop an Artificial Neural Network (ANN) formula to predict the lateral-torsional buckling (LTB) resistance of slender steel cellular beams. A finite element model is developed and validated through experimental tests followed by a parametric study. 768 models are employed to train the ANN formula. The results are compar...

This paper aims to study the composite action on web-post buckling (WPB) resistance of composite cellular beams with precast hollow core slab (PCHCS) units and with precast hollow core slab units with concrete topping (PCHCSCT). Geometrical and material non-linear analyses are performed. A parametric study is developed, varying the opening diameter...

Industrialization of construction makes building operation more environmental friendly and sustainable. This change is necessary as it is an industry that demands large consumption of water and energy, as well as being responsible for the disposal of a high volume of waste. However, the transformation of the construction sector is a big challenge w...

This paper aims to predict the ultimate behavior of steel–concrete composite cellular beams using precast hollow core slabs. A finite element model is developed by geometrical non-linear analysis. A parametric study is carried out, considering symmetric and asymmetric sections with precast hollow core slabs. The key parameters such as the web-post...

This paper aims to investigate the buckling and post-buckling analyses of composite cellular beams. For this, the numerical model is calibrated by experimental tests via post-buckling analysis. A parametric study is developed, considering six cross sections. For each section, the opening diameter and web post length are varied. Regarding the buckli...

The use of industrialized elements results in the speed of execution, it avoids waste of materials, and it meets sustainability requirements. The steel profiles and hollow core slabs are included in this scope. The hollow core slab presents superior quality than cast in-situ structural elements, and it is produced in specific environments with tech...

Composite cellular beams are an advantageous solution that can be used to reduce floor height by solving service ducts problems. In the previous literature, there is little information on numerical modeling that considers sensitivity analysis in composite cellular beams, varying the constitutive models of steel and concrete materials. The concrete,...

This paper aims to investigate the ultimate strength of steel-concrete composite cellular beams, considering the web post buckling. The numerical model is calibrated via experimental tests consolidated in the literature by geometrical non-linear analyses. Asymmetric and symmetric sections are investigated. For each section, the ratio of the web-pos...

In the last two decades, civil construction has used steel elements to compose the structural framework. The use of composite elements of steel and concrete in multi-storey buildings has been gaining market share in several countries, mainly due to the possibility of reducing the height of the building, the structure's own weight and the speed of e...

Lateral distortional buckling (LDB) of I-beams is characterized by simultaneous lateral deflection, twist and cross section change due to web distortion. The present study investigates the effect of web distortion in LDB resistance of doubly-symmetric welded I-beams. Elastic stability and physical and geometrical nonlinear analyses are performed, u...

Cellular beams are those that present sequential web openings along the span, and are produced by thermal cutting and welding. Studies addressing the lateral-torsional buckling resistance curve of cellular beams according to the American standard are scarce. The objective of the present study is to investigate the lateral-torsional resistance in ce...

Researchers have not yet reached a consensus on which buckling curve to use for the calculation of the lateral torsional buckling (LTB) resistance of cellular steel beams in the current version of EC3. In addition, there is a new proposal for the future update of EC3, in which the imperfection factor is a function of the elastic section modulus, as...

Cellular beams are appropriate for large spans with relatively small loads or for conditions in which strain dictates dimensioning. Another important advantage of cellular beams is the possibility of passing utility ducts through the openings, which avoids cutting through the web of the beam or increasing the construction height, which occurs when...