Abstract
Strengthening existing reinforced concrete (RC) slabs using externally bonded materials is increasingly popular due to its adaptability and versatility. Nevertheless, ductility reduction of the rehabilitated flexural members with these materials can lead to brittle shear failure. Therefore, a new approach for strengthening is necessary. This paper presents a methodology to induce ductile failure of flexural strengthened one-way RC slabs. Ultimate failure loads can be considered to develop the proposed design methodology. Different failure modes corresponding to ultimate failure loads for RC slabs are addressed. Flexural and shear failure regions of RC slabs can be established by considering the failure modes. The end span of the concrete slab is shown for a case study, and numerical examples are solved to prove the essentiality of this methodology.
Highlights
The demand for strengthening and rehabilitation of infrastructures becomes more urgent in modern society [1,2,3]
Several studies have been solved to examine the performance of the structures strengthened with fiber reinforced polymer (FRP) and proven its effectiveness due to its high tensile strength and corrosion resistance [14,15,16,17,18]
This study proposes a new classification of failure modes that reflect the corresponding behavior of the reinforced concrete (RC) slab under load
Summary
The demand for strengthening and rehabilitation of infrastructures becomes more urgent in modern society [1,2,3]. Repairing or strengthening RC structures using reinforced concrete, ferrocement, steel, or fiber reinforced polymer (FRP) materials on the tension parts of the RC structures is one of the most common techniques [8]. The development of FRP composite materials allows improving significant loading capacity of strengthened structures [9,10,11,12,13]. The post strengthening with FRP materials can rehabilitate the original flexural capacity of the damaged structures and even increase it significantly. There are many methods for post strengthening flexural RC slabs with
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