A comparison of punching shear strengthening of RC flat plates with FRP bars and steel bolts

Yooprasertchai, Ekkachai; Piamkulvanit, Mawin; Srithong, Chanathip; Sukcharoen, Teerathamrong; Sahamitmongkol, Raktipong

doi:10.1016/j.cscm.2021.e00828

Cited by 2 publications

(8 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The images are shown in Figure 8. The results and crack patterns are consistent with previous studies [23,24].…”

Section: Also Presentssupporting

confidence: 92%

“…The loading setup was designed so that the boundary conditions were provided at the corners with steel plates to obtain uniformed and circular boundary conditions for the column. Although there are no direct standards for this kind of loading setup, this method was extensively used in previous studies to investigate the punching shear of flat slabs [23,24]. In this, each specimen was tested in an upside-down position.…”

Section: Load Setup and Instrumentationmentioning

confidence: 99%

“…However, this increase was not found to be proportional with the reduction in GFRP rod spacing. Yooprasertchai et al [24] investigated the performance of CFRP and aramid FRP (AFRP) in enhancing the punching capacities of flat slabs relative to conventional steel bolts. Shear reinforcement was varied in two ratios, comprising four and seven bars on each column's side, equivalent to 0.75-and 0.5-times the slab's effective depth, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…At present, different types of rods (such as steel, synthetic and natural FRP) are available, which can be utilized to enhance the punching shear of the flat slabs and structural performance of concrete members [43][44][45][46]. However, their efficiency in enhancing the punching shear of flat slab is rare [23,24] especially where there is concern about the comparative performance. The conventional steel bolts are frequently available all around the world; however, there are some issues, such as corrosion and weight.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study

et al. 2022

Self Cite

View full text Add to dashboard Cite

Over the last two decades, considerable attention has been devoted to the strengthening of sub-standard flat-slab constructions. With the evolution of composite materials and an increasing emphasis on the economical and sustainable use of natural fibers, many researchers have utilized them in the strengthening of flat flabs mitigating punching failures. This study aims at investigating and comparing the behavior of flat slabs strengthened with post-installed composite and natural reinforcements. An experimental program was devised consisting of eight flat-slab specimens. One specimen was tested in as-built condition to provide a reference. The remaining specimens were strengthened with Carbon Fiber-Reinforced Polymer (CFRP), Aramid Fiber-Reinforced Polymer (AFRP), and sisal rods. The pattern of post-installed rods was varied as single line, double line, and star shapes around the column. The results indicated that the single-line pattern could only enhance the maximum sustained load by up to 6% compared to that of the reference specimen. On the contrary, double line and star shape configurations resulted in a substantial increase in the maximum sustained load. An analytical assessment of ACI 318-19 provisions resulted in an over-estimation of the shear strengths of CFRP- and AFRP-strengthened slabs. Furthermore, the same provisions led to lower yields than experimental shear strengths for sisal-strengthened slabs.

show abstract

“…The images are shown in Figure 8. The results and crack patterns are consistent with previous studies [23,24].…”

Section: Also Presentssupporting

confidence: 92%

Section: Load Setup and Instrumentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Steel plate bonding, external pretension addition, cross-sectional enhancement, and reinforced concrete coating are some of the strengthening techniques that have been developed in the past and have gained significant popularity over the last decades. Although the methods mentioned above can successfully increase the load-bearing capacity of such components, they are often prone to corrosion [3]. This feature causes the strengthening system to lose its function both in the medium and long term.…”

Section: Introductionmentioning

confidence: 99%

FRP Strengthening of RC Structures: Sustainable, Environmental and Structural Evaluations

YAĞAR

İnce

DEROGAR³

2022

Journal of Sustainable Construction Materials and Technologies

View full text Add to dashboard Cite

Strengthening and rehabilitation have been widely implemented for many years to extend the service life of reinforced concrete structures. The paper begins with a comprehensive review of the fiber-reinforced polymers (FRP) utilization on strengthening particularly over the traditional materials formerly used in practice with respect to materials, manufacturing, operation, construction, and maintenance phases, as well as the engineering and environmental performance of such materials. Carbon and Glass FRP, the most frequently used strengthening materials, are particularly designated in the study and are employed to conduct an environmental performance evaluation using the previously published data in the literature. The paper then investigates the punching shear strength of flat slab-column connections strengthened with externally bonded FRP by means of a nominated database comprising 57 number of data points harvested from the recent literature. The database is used in the evaluation of the test data with TS 500 code equations and the recent modification of Chen and Li. The study enabled the key factors affecting the punching shear strength of such connections to be emphasized and highlighted the fact that the TS 500 code equations fall conservative in predicting the punching shear strength of slab-column connections strengthed with FRP. The study is novel as it provides a comprehensive review of the FRP as a strengthening material with regards to environmental sustainability and also provides an insight into the structural implications of this material by evaluating the current TS 500 code provisions and recent modifications.

show abstract

A comparison of punching shear strengthening of RC flat plates with FRP bars and steel bolts

Cited by 2 publications

References 33 publications

Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study

Use of Natural and Synthetic Fiber-Reinforced Composites for Punching Shear of Flat Slabs: A Comparative Study

FRP Strengthening of RC Structures: Sustainable, Environmental and Structural Evaluations

Contact Info

Product

Resources

About