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Open research questions in Structural Behavior of Reinforced Concrete

142 gap statements mined from Structural Behavior of Reinforced Concrete papers in our 4.5M-paper local library, which holds 1,978 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The behavior of link slab bridges is significantly influenced by cracking and plastic behavior in girders, and inconsistent results in previous investigations are partly attributed to the neglect of such nonlinear effects.

    Novel macroscopic mechanical model for rapid and refined analysis of link slab bridges · 2026 · DOI

  • The need for strengthening techniques to restore column efficiency and improve structural behavior. The lack of a comprehensive review of traditional and modern techniques used in RC columns.

    Traditional and Modern Techniques for Strengthening RC Columns under Seismic Loads: A Review · 2026 · DOI

  • The need to account for uncertainties in material properties, modeling assumptions, and execution variability. The challenge of predicting curvature capacity and design resistance within the N-M domain.

    Strength and Ductility of Hybrid Steel and FRP Reinforced Concrete Sections Subjected to Combined Axial and Bending Regime · 2026 · DOI

  • The lack of a systematic comparison between hybrid configurations. The need for a dimensionless formulation to enable the identification of balanced failure transitions.

    Strength and Ductility of Hybrid Steel and FRP Reinforced Concrete Sections Subjected to Combined Axial and Bending Regime · 2026 · DOI

  • The study only examines a limited number of fiber volume fractions and reinforcement ratios. The study does not examine the effects of other variables on flexural behavior.

    Comparative Experimental Study for Flexural Performance of Engineered Cementitious Reinforced Concrete Beams · 2026 · DOI

  • There is a need for improved empirical formulas for determining nominal flexural strength. The effects of fiber volume fraction, reinforcement ratio, and fiber type on flexural performance are not well understood.

    Comparative Experimental Study for Flexural Performance of Engineered Cementitious Reinforced Concrete Beams · 2026 · DOI

  • The lack of studies on the feasibility of using GFRP rebars in reinforced concrete structures. The need for a comparative analysis of the mechanical properties and durability of GFRP and steel rebars.

    Replacement of Steel Reinforcement with GFRP Rebars in Reinforced Concrete Structures Feasibility Assessment · 2026 · DOI

  • The lack of understanding of the torsional behavior of deep beams with cross-inclined stirrups. The need for a comprehensive study of the effect of stirrup type and spacing on the torsional capacity and ductility of deep beams.

    Torsional strength and deformation characteristics of HSC deep beams reinforced with cross-inclined stirrups · 2026 · DOI

  • The lack of reliable models and standardized methods to predict NSM systems' mechanical behavior. The difficulties encountered in field applications of NSM reinforcement systems.

    EXAMINING THE PROGRESS IN NEAR SURFACE MOUNT REINFORCEMENT METHODS WITH ANALYTICAL MODELS AND NEURAL NETWORKS · 2026 · DOI

  • Limited resilience and sustainability of current infrastructure maintenance practices. Need for more effective maintenance practices.

    Strengthening of RC beams using basalt fiber reinforced polymer with ECC · 2026 · DOI

  • The current methods for retrofitting RC beams are not sufficient to address the growing concern of infrastructure deterioration and aging. There is a need for more resilient and sustainable solutions for infrastructure maintenance.

    Strengthening of RC beams using basalt fiber reinforced polymer with ECC · 2026 · DOI

  • The study highlights the need for a calibrated 3D plasticity-fracture finite element model.

    Experimental and Numerical Investigation of Flexural Behaviour in Steel Fiber-Reinforced Concrete Notched Beam · 2026 · DOI

  • The limitations of conventional FRP strengthening methods, such as susceptibility to debonding and limited effectiveness for heavily damaged beams.

    Shear Rehabilitation of Damaged RC Beams Using Embedded Through-Section CFRP Bars Technique · 2026 · DOI

  • The presence of cold joints can reduce the effective bending stiffness of a diaphragm wall. There is a need to investigate the influence of longitudinal cold joints on the structural performance of self-compacting concrete diaphragm walls.

    Experimental Study of Cold Joint Performance in a Scaled Fiber-Reinforced Self-Compacting Concrete Diaphragm Wall Model Using: Effects of Geometric Profiles and Chemical Treatments · 2026 · DOI

  • There is a need to determine the most suitable mortar composition for improving the resilience and durability of compromised structures. The current study aims to address this gap.

    Assessing Mortar Mixes for Retrofitting Damaged RC Columns · 2026 · DOI

  • The technical challenges include the difficulty of achieving uniform dispersion of carbon nanotubes in the concrete matrix. The domain challenges include the need for sustainable and durable reinforced concrete beams.

    Investigating the flexural performance of reinforced concrete beams using eco-friendly geotextile and wire mesh reinforcements · 2026 · DOI

  • The study is limited to small-scale RC beams. The experimental design does not include a comprehensive investigation of the effects of varying material properties and beam sizes.

    Investigating the flexural performance of reinforced concrete beams using eco-friendly geotextile and wire mesh reinforcements · 2026 · DOI

  • There is a need to investigate the shear behavior of UHPC-NC composite members with varying thicknesses.

    Experimental Study on Shear Behavior of UHPC-NC Composite Members with Varying Thicknesses: Comparison with Conventional RC Beams · 2026 · DOI

  • Traditional manual design methods are time-consuming and susceptible to computational errors. Existing design charts are often outdated and do not incorporate modern safety factors or harmonized code provisions.

    FORMULATION OF DESIGN TABLES AND CHARTS FOR REINFORCED CONCRETE COLUMNS AND SLABS · 2026 · DOI

  • Limited durability of concrete structures in aggressive environmental conditions. High maintenance costs of concrete structures.

    Comparative Study of GFRP & Conventional Steel in Road Drainage Design · 2026 · DOI

  • The authors would like to recommend the following: o Study the deference cross-section of slender columns such as circular.

    Effect of Slenderness on the Behavior of Self-Compacting Reinforced Concrete Slender Columns Strengthened with Steel Jacket · 2026 · DOI

  • The study identifies a gap in the understanding of the behavior of reinforced concrete columns with varying cross-sectional geometries and mix ratios.

    Experimental evaluation of short reinforced concrete columns under varying mix ratios and shape configurations · 2026 · DOI

  • Combination of steel and GFRP rebars. Aging and long-term field studies. The fire resistance of GFRP reinforced concrete.

    Replacement of Steel Reinforcement with GFRP Rebars in Reinforced Concrete Structures Feasibility Assessment · 2026 · DOI

  • Investigating the use of GFRP in other construction applications. Developing new methods to improve the ductility of GFRP rebars.

    Comparative Study of GFRP & Conventional Steel in Road Drainage Design · 2026 · DOI

  • Further validation of the proposed model using additional experimental data. Investigation of the influence of other factors on the elastic modulus of hooked-end steel fiber-reinforced concrete. Development of models for other types of fiber-reinforced concrete.

    INTERPRETABLE PREDICTION OF THE ELASTIC MODULUS OF HOOKED-END STEEL FIBER-REINFORCED CONCRETE · 2026 · DOI

Most-cited papers in Structural Behavior of Reinforced Concrete

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Open questions raised by papers listed on this page include: (1) The lack of a comprehensive review of traditional and modern techniques used in RC columns (“Traditional and Modern Techniques for Strengthening RC Columns under Seismic…”, 2026); (2) The lack of a systematic comparison between hybrid configurations (“Strength and Ductility of Hybrid Steel and FRP Reinforced Concrete Sections…”, 2026); (3) There is a need for improved empirical formulas for determining nominal flexural strength (“Comparative Experimental Study for Flexural Performance of Engineered…”, 2026); (4) The lack of studies on the feasibility of using GFRP rebars in reinforced concrete structures (“Replacement of Steel Reinforcement with GFRP Rebars in Reinforced Concrete…”, 2026); (5) The lack of understanding of the torsional behavior of deep beams with cross-inclined stirrups (“Torsional strength and deformation characteristics of HSC deep beams reinforced…”, 2026). 142 gap statements have been mined from Structural Behavior of Reinforced Concrete papers in our 4.5M-paper local library, which holds 1,978 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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