On the reinforcement of cement mortars through 3D printed polymeric and metallic fibers

Farina, Ilenia; Fabbrocino, Francesco; Carpentieri, Gerardo; Modano, Mariano; Amendola, Ada; Goodall, Russell; Feo, Luciano

doi:10.1016/j.compositesb.2015.12.006

Cited by 140 publications

(80 citation statements)

References 26 publications

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“…Such a bridge design technique can also be applied to prestressed concrete structures, arch bridges with suspended decks, and all prestressable structures [25]- [31]. Another field of application of the influence matrix approach proposed in the present work regards the study of the optimal state of prestress of tensile reinforcements of existing masonry structures [32]- [35].…”

Section: Discussionmentioning

confidence: 98%

On the Optimal Design of Cable-Stayed Bridges

Carpentieri¹,

Modano²,

Fabbrocino³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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This paper studies cable-stayed bridges (CBSs), with special focus on the initial force distributions in cables during construction phases. An algorithm for the optimal design of the pre-tensioning sequence of cables is presented. A procedure for the optimization of cable forces is developed, according to a given objective function. Particular attention is given to the choice of the parameters to be optimized, and numeric examples are provided. The proposed method is employed to study the At Tannumah bridge in Basrah, Iraq; and is suitable for the optimization of the pre-tensioning sequence of arbitrary cable-stayed bridges. We show in the rest of the paper that an initial design (named S 0 configuration) that does not include any pre-tensioning forces in cables can lead to a highly non uniform bending moment distribution over the deck; which is not ideal for an optimal structure. Fort that reason we develop an "optimal design" (named S d configuration), that corresponds to pre-tensioning forces inducing an "optimal" bending moment distribution over the deck.

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Section: Discussionmentioning

confidence: 98%

On the Optimal Design of Cable-Stayed Bridges

Carpentieri¹,

Modano²,

Fabbrocino³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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“…They represent a first step in the direction of designing reinforcing elements with hierarchical structure to form fabrics, fibers and coatings of groundbreaking reinforcements for next generation composites, profiting from the rapid prototyping capabilities of AM technologies at different scales. Future extensions of the present study (see, e.g., [28]) will focus on nano-, micro-and macroscale lattice reinforcements for a wide range composite materials, through a closed-loop approach including the computational design and the additive manufacturing of physical models via innovative, multimaterial deposition techniques. Such materials will be used, e.g., for the fabrication of innovative materials, and the structural retrofitting of existing buildings and historical constructions [29][30][31] [32].…”

Section: Discussionmentioning

confidence: 99%

Optimal Design and Additive Manufacturing of Novel Reinforcing Elements for Composite Materials

Fabbrocino¹,

Farina²,

Amendola³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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“…As is known, a ductile-type failure is preferable to a brittle-type failure; therefore, a design can be performed considering the strength hierarchy. This principle allows for the identification of a better way to design a new joint or eventually retrofit an existing one (e.g., adopting traditional or innovative solutions like as FRP, FRCM, or even newer technologies [38][39][40][41][42][43][44]) to achieve the desired behaviour and failure mode.…”

Section: Discussionmentioning

confidence: 99%

Design Oriented Model for the Assessment of T-Shaped Beam-Column Joints in Reinforced Concrete Frames

et al. 2017

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Abstract:Beam-column joints represent very important elements of reinforced concrete (RC) structures. In fact, beams and columns, at the boundary, generate internal forces acting on concrete core and on reinforcement bars with a very high gradient. To fully understand the seismic performances and the failure modes of T-shaped beam-column joints (external corner-positioned) in RC structures, a simplified analytical model of joint behaviour is proposed and theoretical simulations have been performed. The model is based on the solution of a system of equilibrium equations of cracked joint portions designed to evaluate internal stresses at different values of column shear forces. The main aim of the proposed model is to identify the strength hierarchy. Limit values of different internal stresses allow us to detect the occurrence of different failure modes (namely the failure of the cracked joint, the bond failure of passing through bars, and the flexural/shear failures of columns or beams) associated with column shear forces; the smaller one represents the capacity of the joint. The present work, focusing on T-shaped joints, could represent a useful tool for designers to quantify the performance of new structures or of existing ones. In fact, such a tool allows us to push an initial undesired failure mode to a more appropriate one to be evaluated. Finally, some experimental results of tests available in literature are reported, analysed, and compared to the predictions of the proposed model (by means of a worked example) and of some international codes. The outcomes confirm that failure modes and corresponding joint capacities require an analytical model, like the proposed one, to be accurately predicted.

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On the reinforcement of cement mortars through 3D printed polymeric and metallic fibers

Cited by 140 publications

References 26 publications

On the Optimal Design of Cable-Stayed Bridges

On the Optimal Design of Cable-Stayed Bridges

Optimal Design and Additive Manufacturing of Novel Reinforcing Elements for Composite Materials

Design Oriented Model for the Assessment of T-Shaped Beam-Column Joints in Reinforced Concrete Frames

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