Shear Behaviors of RC Beams Externally Strengthened with Engineered Cementitious Composite Layers

Wang, Guan; Yang, Caiqian; Pan, Yong; Zhu, Fawang; Jin, Kai; Li, K.F.; Nanni, Antonio

doi:10.3390/ma12132163

Cited by 25 publications

(10 citation statements)

References 32 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overall, the outcomes indicate a remarkable improvement in shear load capacity and stiffness for the strengthened beams compared to the un-strengthened ones. The degree of the improvement is dependent on the type of cementitious material, strengthening configuration, jacketing thickness, and so on [57,58]. Table 2 indicates shear behaviors of the RC beams strengthened with different types of cementitious materials and studied by various authors.…”

Section: Shear Behaviorsmentioning

confidence: 99%

Structural Strengthening/Repair of Reinforced Concrete (RC) Beams by Different Fiber-Reinforced Cementitious Materials - A State-of-the-Art Review

Bahij¹,

Omary²,

Feugeas³

et al. 2020

jcde

View full text Add to dashboard Cite

In the last few decades, premature deterioration of reinforced concrete (RC) structures has become a serious problem because of severe environmental actions, overloading, design faults, and materials deficiencies. Therefore, repair and strengthening of RC elements in existing structures are very important to extend their service life. There are numerous methods for retrofitting and strengthening of RC structural components such as; steel plate bonding, external pre-stressing, section enlargement, fiber-reinforced polymer (FRP) wrapping, and so on. Although these modifications can successfully improve the load-bearing capacity of the beams, but they are still prone to corrosion damage resulting in failure of the strengthened elements. Therefore, many researchers used cementitious materials due to their low-cost, corrosion resistance, and resulted in the improvement of the tensile and fatigue behaviors. Different types of cementitious materials such as; fiber-reinforced concrete (FRC), high performance concrete (HPC), high strength concrete (HSC), ultra-high performance concrete (UHPC), steel fiber-reinforced high strength lightweight self-compacting concrete (SHLSCC), fabrics reinforced cementitious material (FRCM) and so on have been used to strengthen structural elements. This paper summarizes previously published research papers concerning the structural behaviors of RC beams strengthened by different cementitious materials. Shear behaviors, flexural characteristics, torsional properties, deflection, cracking propagation, and twisting angle of the strengthened beams are explained in the present paper. Finally, proper methods are proposed for strengthening RC beams under various loading conditions.

show abstract

Section: Shear Behaviorsmentioning

confidence: 99%

Structural Strengthening/Repair of Reinforced Concrete (RC) Beams by Different Fiber-Reinforced Cementitious Materials - A State-of-the-Art Review

Bahij¹,

Omary²,

Feugeas³

et al. 2020

jcde

View full text Add to dashboard Cite

show abstract

“…The effectiveness of using SHCC to improve shear strength, shear strain capacity and ductility of structural beams was further demonstrated by Alrefaei et al [25]. The feasibility and effectiveness of externally bonded SHCC of normal tensile strength in the shear strengthening of RC beams were shown by Yang et al [26] and Wang et al [27].…”

Section: Introductionmentioning

confidence: 98%

Shear strengthening of reinforced concrete beams with high strength strain-hardening cementitious composites (HS-SHCC)

Wei

Chen

et al. 2020

Mater Struct

View full text Add to dashboard Cite

Strain-hardening cementitious composite (SHCC) was widely recognized as a material that possesses great potential in the repair and strengthening of reinforced concrete (RC) structures. SHCC can usually achieve high ductility with multiple cracking behavior and it also has excellent durability. Moreover, high tensile strength can also be achieved with proper mix design. In this study, conventional RC beams with shear span-to-depth ratio of 1.5:1 and 2.5:1 were cast first, while high-strength SHCC were then cast as thin patches on lateral surfaces of the RC beams to serve as the strengthening layers. The beams were subject to four-point bending test to obtain their ultimate shear capacities. It was observed from the test results that the ultimate shear capacity of strengthened RC beams increases evidently compared to the reference beams. Upon ultimate shear failure, no spalling of surface concrete occurred as it was restrained by the strengthening layers with the formation of stable multiple fine cracks. A finite element model was constructed to simulate the experimental tests. The results of FEM analysis correlated well with experimental results. A numerical parametric study was then carried out to evaluate the influence of the thickness of HS-SHCC layer and the shear span-todepth ratio. This study concludes the feasibility of the use of high strength SHCC in shear strengthening of RC structures.

show abstract

“…The general solution to the problem of strain measurement by various sensors, including fiber-optic sensors, is associated with obtaining information about all components of the strain tensor. One way to solve this problem is to use special sensor layouts called rosettes [ 3 , 4 , 5 , 6 , 7 ]. When strain measurement is carried out inside or on the surface of a structure, being in the plane stress or plane strain state, the relevant information about all components of the strain tensor can be obtained using a rosette of three differently-directed sensors located on one plane.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Reliability of Strain Measurements Made with the Fiber Bragg Grating Sensor Rosettes Embedded in a Polymer Composite Material

Матвеенко

Kosheleva

Serovaev

et al. 2021

Sensors

View full text Add to dashboard Cite

The results of strain measuring experiments, with the help of rosettes consisting of fiber Bragg grating sensors (FBG) embedded at the manufacturing stage in a polymer composite material are considered in this paper. The samples were made by the direct pressing method from fiberglass prepregs. A cross-shaped sample was tested under loading conditions corresponding to a complex stress state. A variant of strain calculations based on experimental data is discussed. The calculations were performed under the assumption of a uniaxial stress state in an optical fiber embedded in the material. The obtained results provide a reasonable explanation of the absence in the conducted experiment of two peaks in the reflected optical spectrum, the presence of which follows from the known theoretical principles. The experimental result with two peaks in the reflected optical spectrum was obtained for the same sample under a different loading scheme. The proposed variant of the numerical model of the experiment and the results of numerical simulation made for FBG rosettes embedded in the material allowed to estimate error in the strain values calculated on the assumption of the uniaxial stress state in the optical fiber and in the presence of two peaks in the reflected optical spectrum.

show abstract

Shear Behaviors of RC Beams Externally Strengthened with Engineered Cementitious Composite Layers

Cited by 25 publications

References 32 publications

Structural Strengthening/Repair of Reinforced Concrete (RC) Beams by Different Fiber-Reinforced Cementitious Materials - A State-of-the-Art Review

Structural Strengthening/Repair of Reinforced Concrete (RC) Beams by Different Fiber-Reinforced Cementitious Materials - A State-of-the-Art Review

Shear strengthening of reinforced concrete beams with high strength strain-hardening cementitious composites (HS-SHCC)

Analysis of Reliability of Strain Measurements Made with the Fiber Bragg Grating Sensor Rosettes Embedded in a Polymer Composite Material

Contact Info

Product

Resources

About