Cyclic behavior of GFRP strengthened infilled RC frames with low and normal strength concrete

Arslan, Mehmet Emin; Durmuş, Ahmet; Hüsem, Metin

doi:10.1515/secm-2017-0060

Cited by 10 publications

(5 citation statements)

References 22 publications

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“…The main goals of these studies have been to prevent loss of life and economic losses. Some of the previous studies also included improvement of the frame's structural performance by strengthening the infill walls with various methods or using other infill materials (Arslan, Durmuş, & Hüsem, 2019;Binici et al, 2019;Ricci, Di Domenico, & Verderame, 2018). Pure OOP investigations for infill walls are mostly concerned about two situations: the first is that pieces of infill wall fall on people and valuable things during an earthquake.…”

Section: Figurementioning

confidence: 99%

Effects of mortar compressive strength on out of plane response of unreinforced masonry walls

Sorkhab

Küçük

Sarı

2021

rdlc

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In this study, the out-of-plane response of infill walls that are widely used in Turkey and the surrounding regions were experimentally investigated. Several out-of-plane wall tests were performed in the laboratory, with the walls specimens produced with lateral hollow clay bricks (LHCB) and different mortar qualities. The walls were tested in their out-of-plane (OOP) direction under static load conditions and evaluated based on the load-bearing and energy dissipation capacities, crack propagations, mortar strengths, and initial stiffnesses. These walls are experimentally investigated to understand the effects of the mortar strength on the infill wall structural behaviors and to assess the effectiveness of the out-of-plane strength formulations. It was found that when the mortar strength is low, the first major crack occurs at the mortar, however, because of the arch mechanism efficiency in this situation the OOP load-carrying and energy dissipation capacities of unreinforced walls can be significantly increased. When the first major crack in the wall occurs in the brick itself, the arc mechanism is provided with delicate sections in the brick, which leads to strength decreasing in the walls. In this case, excessive deviations occur in the out-of-plane strength formulations estimates. This study shows that the arc mechanism, the damage start region and progress can change significantly unreinforced masonry (URM) infill walls behaviors.

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Section: Figurementioning

confidence: 99%

Effects of mortar compressive strength on out of plane response of unreinforced masonry walls

Sorkhab

Küçük

Sarı

2021

rdlc

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“…Characteristic compressive strength and elasticity modulus of concrete was determined as 25.14 and 28,670 MPa, respectively. Table 1 shows the mechanical properties of the rebar used in the test specimen 58 . Figure 12 compares the numerical response with the experimental result.…”

Section: Numerical Model Of Rc Frame With the Corrosion Damage Modelmentioning

confidence: 99%

Effect of corrosion in reinforced concrete frame components on pushover behavior and ductility of frame

Kordtabar

Dehestani

2020

Structural Concrete

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Chloride‐induced corrosion of reinforced concrete (RC) is one of the main reasons for decreasing the seismic performance level of RC structures over their lifetime. In the present study, base shear capacity and ductility were considered as criteria for evaluating seismic performance of the RC frame. The impact of corrosion on the ductility and base shear capacity of a two‐dimensional single‐story single‐span RC frame was investigated using nonlinear static analysis considering the deterioration of the mechanical properties of the rebar and concrete. The corrosion damage model was implemented using fiber sections and nonlinear elements, and then pushover analysis over 0, 15, 30, 45, and 60 years of life was performed. The strain penetration effect was considered in the fiber model at the column‐footing joints. The accuracy of modeling was validated with experimental data of the RC frame subject to cycle loading. The final results showed that by decreasing the water‐to‐cement ratio and increasing the cover thickness, the seismic performance of the RC frame is preserved over a lifetime. The time‐dependent ductility of the RC frame was evaluated at two structural and cross‐sectional levels. The results revealed that the corroded RC frame has a lower base shear capacity, ultimate drift, and ductility than the intact RC frame. Also, the corrosion‐induced deterioration of rebar and concrete significantly decreases the seismic performance of the corroded RC frame.

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“…The use of FRP in the construction industry comes to the fore due to their lightness, easy workability, economy, resistance to environmental conditions and corrosion, and high strength compared to their weight. These benefits make them an alternative for reinforcing structures and increasing the stiffness and strength of structural elements [8][9][10][11][12][13]. CFRP has a good level of mechanical, fatigue, and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Bending Behaviors of GFRP-Strengthened Steel RHS Profiles with Experimental and Numerical Models

2023

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The contribution of GFRP (glass fiber reinforced polymer) fabric to the bending behavior of steel RHS (rectangular hollow section) beams was investigated by experimental and numerical studies. In the first part of the study, small-scale RHS profiles were strengthened with GFRP fabrics in ten different configurations in the experimental study. The bending behavior of the profiles was determined by three-point bending tests, and the best strengthening configuration was decided. The numerical models were verified with the experimental results. In the second part, real-size RHS beams were strengthened with the optimum strengthening configuration. In the results of the study, it was determined that the U-shaped strengthening provided the maximum contribution to the RHS beams bending behavior. The minimum GFRP size to be used in strengthening is important, as an insufficient GFRP length leads to GFRP failure, and the number of layers should be increased for more load capacity. A total of 25% of the net beam span was determined to be the minimum GRFP length. In full-size beams, a double-layer GFRP increased the maximum load-bearing capacity by 7%. Formulas were obtained to determine the contribution of single and double-layered U-shaped GFRP to the shape factors of the RHS. With the formulations, the plastic moment capacity can be determined.

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Cyclic behavior of GFRP strengthened infilled RC frames with low and normal strength concrete

Cited by 10 publications

References 22 publications

Effects of mortar compressive strength on out of plane response of unreinforced masonry walls

Effects of mortar compressive strength on out of plane response of unreinforced masonry walls

Effect of corrosion in reinforced concrete frame components on pushover behavior and ductility of frame

Investigation of Bending Behaviors of GFRP-Strengthened Steel RHS Profiles with Experimental and Numerical Models

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