Abstract
This paper presents a focused study on using different methods to enhance the ultimate capacity of flexural behavior in RC slabs. Four RC specimens were casted with common compressive strength and reinforced with steel mesh. Specimens were strengthened with different methods such as usage of GFRP sheets, carbon fibers laminate strips and near surface mounted steel rebars. All specimens were subjected to two-point loading setup. Load was increased from zero to failure load. First crack was recorded and crack pattern was observed. The behavior of strengthened specimens was compared to that of the control specimen to judge the efficiency of the used techniques. Test results showed that the used techniques were effective in enhancing the behavior of the strengthened slabs by noteworthy values.
Highlights
There is no doubt that the problem of cracked concrete structures has become one of the most pressing problems that must join hands in efforts to reach a solution before cracks appear in structure
This paper presents a focused study on using different methods to enhance the ultimate capacity of flexural behavior in RC slabs
Specimens were strengthened with different methods such as usage of Glass Fiber Reinforced Polymer (GFRP) sheets, carbon fibers laminate strips and near surface mounted steel rebars
Summary
There is no doubt that the problem of cracked concrete structures has become one of the most pressing problems that must join hands in efforts to reach a solution before cracks appear in structure. Some of concrete structures that were built in the past years were inadequate to carry service loads. Efficiency of slab strengthening was judged by comparing the behavior of strengthened specimens from the point of view of cracking and ultimate loads, cracking mechanism, and mode of failure. This research was focused on studying three of the most popular innovative slab strengthening techniques: GFRP sheets, carbon fiber laminate strips, and near surface mounted steel rebars. One of these slabs was tested as reference (control) specimen. The rest three specimens were strengthened using three different techniques Glass Fiber Reinforced Polymer (GFRP) Sheets, Carbon Fiber Reinforced Polymer (CFRP) Laminate Strips and Near Surface Mounted Steel Rebars (NSMR)
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