Dynamic analysis of composite beam and floors with deformable connection using plate, bar and interface elements

Machado, Wanderson Gonçalves; Silva, Amilton Rodrigues da; Neves, Francisco de Assis das

doi:10.1016/j.engstruct.2019.01.070

Cited by 12 publications

(5 citation statements)

References 22 publications

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“…Vibrations which are induced by human walking or machines on slabs become seriously disturbing when the fundamental frequencies are below 7-8 Hz according to most Standards, including the "Design of Floor Structures for Human Induced Vibrations" [7]. In slabs of relatively low self-weight compared with the load-bearing capacity, dynamic analysis is needed in order to avoid comfort problems during serviceability [8][9][10][11][12][13].…”

Section: Vibrational Responsementioning

confidence: 99%

Real Cyclic Load-Bearing Test of a Ceramic-Reinforced Slab

Albareda-Valls¹,

Rivera-Rogel²,

Calvo³

et al. 2020

Applied Sciences

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Ceramic-reinforced slabs were widely used in Spain during the second half of the 20th century, especially for industrial buildings. This solution was popular due to the lack of materials at that time, as it requires almost no concrete and low ratios of reinforcement. In this study, we present and discuss the results of a real load-bearing test of a real ceramic-reinforced slab, which was loaded and reloaded cyclically for a duration of one week in order to describe any damage under a high-demand loading series. Due to the design of these slabs, the structural response is based more on shear than on bending due to the low levels of concrete and the geometry and location of re-bars. The low ratio of concrete makes these slabs ideal for short-span structures, mainly combined with steel or RC frames. The slab which was analyzed in this study covers a span of 4.88 m between two steel I-beams (IPN400), and corresponds to a building from the mid-1960s in the city of Igualada (Barcelona, Spain). A load-bearing test was carried out up to 7.50 kN/m2 by using two-story sacks full of sand. The supporting steel beams were propped up in order to avoid any interference in the results of the test; without the shoring of the steel structure, deflections would come from the combination of the ceramic slab together with the steel profiles. A process of loading and unloading was repeated for a duration of six days in order to describe the cyclic response of the slab under high levels of loading. Finally, vibration analysis of the slab was also done; the higher the load applied, the higher the fundamental frequency of the cross section, which is more comfortable in terms of serviceability.

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Section: Vibrational Responsementioning

confidence: 99%

Real Cyclic Load-Bearing Test of a Ceramic-Reinforced Slab

Albareda-Valls¹,

Rivera-Rogel²,

Calvo³

et al. 2020

Applied Sciences

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“…As a labor-saving, environment-friendly, and lowcarbon construction method, the precast concrete (PC) technology shows great potential in promoting construction efficiency and improving product quality since such a composite floor system reduces the amount of formwork, wet work, and construction pollution compared to casting in situ [2][3][4][5][6][7]. Thus, precast composite floor systems have always been of interest and widely used in buildings to fully combine the advantages of both cast in situ construction and prefabricated elements [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Flexural Performances of Novel Wet Joints with Sleeve Connections in Precast Composite Floor System

Zhang,

Feng,

Zeng

et al. 2024

Buildings

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A new type of assembled integral multi-ribbed composite floor system with novel wet joint and steel sleeve connections, which exhibits satisfactory strength and stiffness, was proposed in the previous study. To further study the flexural performances of the joints, six groups of specimens, including two cast in situ concrete slabs and four composite slabs sized 4700 mm × 1200 mm × 300 mm and 2450 mm × 1200 mm × 300 mm, were investigated under four-point flexural tests. Four main influence factors were experimentally studied, i.e., casting methods, joint amounts, shear span lengths, and steel sleeve layout directions, on the failure modes, crack distributions, and deflection–load carrying capacity relationship. Test results indicated that the proposed composite slab system could provide the ultimate bearing capacity lower by 7% than that of the cast in situ concrete slabs, largely exceeding the code-predicted strength. No strain difference between the steel sleeve connections and steel rebars indicated good wet joint connection behavior. More hollow-core sections and long shear spans increased the potential of interfacial splitting cracks, leading to a shorter elastic stage and lower elastic stiffness. A finite element model was further parametrically conducted to explore the structural performances. Finite element results also indicate that the precast concrete slab had a more significant influence on the failure loads than the influences of concrete compressive strength and lap-splice steel rebar strength. These findings indicate that the proposed composite slab systems possess a satisfactory performance in the ultimate bearing capacity and deformability. Thus, such an assembled integral multi-ribbed composite floor system can be widely applied in construction.

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“…Structures are engineered to withstand different internal forces, either acting alone or in combination [1,2]. This design framework also necessitates the consideration of fatigue-related and seismic issues such as crack propagation [3][4][5][6]. Structural integrity and performance are inevitably impacted by factors such as corrosion, cyclic load characteristics, and maintenance routines, leading to damage and consequent crack propagation [7].…”

Section: Introductionmentioning

confidence: 99%

Discriminant Analysis Based on the Patch Length and Crack Depth to Determine the Convergence of Global–Local Non-Intrusive Analysis with 1D-to-3D Coupling

Jaque-Zurita,

Hinojosa,

Castillo-Ibarra

et al. 2023

Symmetry

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Reducing the time spent on computational simulations is an active area in solid mechanics, and efforts are being made to implement novel techniques and apply them to time-sensitive areas in the industry and research. One of these techniques is called global–local non-intrusive analysis, a methodology that enriches a local patch model using 3D elements with non-linear behavior (such as crack propagation), coupled with a linear, global 1D frame model that solves iteratively, thereby reducing overall times compared to a monolithic solution. However, engineers do not know the length of the local model (also known as the patch model) to be considered, which affects the convergence, computational time, and overall quality of the solution. Therefore, this study considered the use of categorical analyses for performing linear and quadratic discriminant solvers for a given set of simple cases with symmetric crack propagation within the local model and defining the convergence boundary with a certain probability of a successful convergence. In addition, a practical case was analyzed for different lengths of the local model, giving strong correlations to the results of the discriminant analysis. The solution of all the cases was also analyzed, considering the number of degrees of freedom, computational times, and the number of iterations for convergence. This aimed to establish a functional relation for engineering practice, enabling the determination of a suitable patch length for performing global–local non-intrusive analysis with crack propagation in doubly symmetric steel sections.

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Dynamic analysis of composite beam and floors with deformable connection using plate, bar and interface elements

Cited by 12 publications

References 22 publications

Real Cyclic Load-Bearing Test of a Ceramic-Reinforced Slab

Real Cyclic Load-Bearing Test of a Ceramic-Reinforced Slab

Flexural Performances of Novel Wet Joints with Sleeve Connections in Precast Composite Floor System

Discriminant Analysis Based on the Patch Length and Crack Depth to Determine the Convergence of Global–Local Non-Intrusive Analysis with 1D-to-3D Coupling

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