Behavioral response of reinforced concrete beams with ultra-ductile fiber-reinforced cementitious composite layers – Experiments, models and reinforcement limits

Abbas, Yassir M.; Khan, M. Iqbal

doi:10.1016/j.jobe.2023.107475

Cited by 3 publications

(1 citation statement)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results showed that the shear bearing capacity of the U-shaped UHPC formwork for the composite beam was significantly improved. Also, several studies [16,17] showed that applying a layer of ECC could increase the maximum load and impact the minimum reinforcement requirements. Carlos Zanuy [18] conducted an impact experiment on RC beams strengthened with a thin layer of ECC.…”

Section: Introductionmentioning

confidence: 99%

Structural Behavior of Precast Monolithic Composite Beams with ECC Prefabricated Shells

Lu,

Li,

Pan

et al. 2024

Buildings

View full text Add to dashboard Cite

Engineered Cementitious Composite (ECC) was used in the prefabricated shell of a precast composite beam, and the validity of the ECC in the precast monolithic composite beam’s flexural performance was studied. Flexural performance tests were conducted on six specimens to analyze their failure state, failure mechanism, bearing capacity, and deformation capacity. Compared with the Reinforced Concrete (RC) prefabricated shell composite beam, the ECC prefabricated shell composite beam showed a higher bearing capacity and lower damage degree. The yielding load of specimen PSMCB−1 increased by 5.6%. The maximum load of specimen PSMCB−1 reached 256.6 kN, having increased by 8.1%. When the tests stopped, the maximum crack width of specimen PSMCB−1 was 4.1mm, while the maximum crack width of specimen PSMCB−6 reached 9.0 mm. The ECC material in the prefabricated shell also delayed the yielding of the steel bars in the shell.

show abstract

Section: Introductionmentioning

confidence: 99%

Structural Behavior of Precast Monolithic Composite Beams with ECC Prefabricated Shells

Lu,

Li,

Pan

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

Application of variable-height beams with wooden sub-rafter elements in the roof structures of industrial buildings

Shishov,

Lisyatnikov,

Lukin

et al. 2023

E3S Web Conf.

View full text Add to dashboard Cite

The investigation pertains to the coating utilized in single-story industrial buildings. Frame constructions with spans of 24, 30, and 36 meters are examined, employing wood-based elements as rafter structures. The reinforced concrete rafter structures exhibit a pitch of 2-3 meters and are configured in the shape of an I-beam. The truss structures along their length are subdivided into seven sections, featuring variable lengths, flange widths, rib thicknesses, and cross-section heights. Deflection calculations consider the nonlinearity of concrete and reinforcement deformations, adhering to prevailing building codes. The elastic solutions method is employed in conjunction with the finite difference method. The proposed coating designs are distinguished by their ease of manufacturing, transportation, and element installation. The wood-composite rafter structure boasts a lower mass compared to reinforced concrete elements, facilitating installation with a lightweight crane and overall diminishing the coating's weight without compromising its structural integrity. Several beam characteristics for spans of 24, 30, and 36 meters include respective mid-span heights of 1.2 meters, 1.4 meters, and 1.5 meters; volumes of 8.23 cubic meters, 9.25 cubic meters, and 10.6 cubic meters; and weights of 19.8 tons, 22.2 tons, and 25.4 tons. The proposed solution allows for the integration of bending moment and stiffness diagrams for the rafter beam configuration.

show abstract

Progressive Collapse Behavior of a Precast Reinforced Concrete Frame System with Layered Beams

Kolchunov,

Fedorova,

Savin

et al. 2024

Buildings

View full text Add to dashboard Cite

A possible way to improve the structural safety and robustness of precast building structures is to develop effective precast frame systems with layered beams, which combine prefabricated parts with cast-in situ ordinary concrete, high-performance concrete, fiber concrete, or FRP. The paper provides a new type of precast reinforced concrete frame system with layered beams for rapidly erected multi-story buildings resistant to accidental actions. Using a combination of the variational method and two-level design schemes, a simplified analytical model has been developed for structural analysis of the precast reinforced concrete frame system, both for serviceable and ultimate limit states as well as for accidental actions. The proposed model allows for determining shear deformations and the formation and opening of longitudinal cracks in the intermediate contact zone between precast and monolithic parts of reinforced concrete structural elements of the frame, as well as the formation and opening of normal cracks because of the action of axial tensile force or bending moment in these elements. The design model was validated by comparing the calculated and experimental data obtained from testing scaled models of the precast reinforced concrete frame system with layered beams. The paper investigates and thoroughly analyzes the factors affecting the stiffness and bearing capacity of the intermediate contact zone, discusses the criteria for the formation of shear cracks along the contact zone of precast and monolithic concrete, and examines the change in the stiffness and dissipative properties of layered elements at different stages of their static–dynamic loading. The robustness of the experimental models of the structural system was not ensured under the specified load, section dimensions, and reinforcement scheme. Following an accidental action, longitudinal cracks were observed in the contact joint between the monolithic and prefabricated parts in the layered beams. This occurred almost simultaneously with the opening of normal cracks in adjacent sections. A comprehensive analysis of the results indicated a satisfactory degree of agreement between the proposed semi-analytical model and the test data.

show abstract

Behavioral response of reinforced concrete beams with ultra-ductile fiber-reinforced cementitious composite layers – Experiments, models and reinforcement limits

Cited by 3 publications

References 23 publications

Structural Behavior of Precast Monolithic Composite Beams with ECC Prefabricated Shells

Structural Behavior of Precast Monolithic Composite Beams with ECC Prefabricated Shells

Application of variable-height beams with wooden sub-rafter elements in the roof structures of industrial buildings

Progressive Collapse Behavior of a Precast Reinforced Concrete Frame System with Layered Beams

Contact Info

Product

Resources

About