International Journal of Civil and Structural Engineering Research ISSN 2348-7607 (Online) Vol. 8, Issue 1, pp: (151-160), Month: April 2020 - September 2020, Available at: www.researchpublish.com
BEHAVIOR OF LIGHT- WEIGHT CONCRETE SOLID SLABS REINFORCED USING G.F.R.P. REBAR 1
Alaa G. Sherif, 2Nasr Z. Hassan, 3Mohamed Saber, 4Mirhan W. Adly 1 2
Assoc. Prof. of Concrete Structures, Faculty of Eng., Mattaria, Helwan Univ., Cairo, Egypt 3
4
Prof. of Concrete Structures, Faculty of Eng., Mattaria, Helwan Univ., Cairo, Egypt
Teacher, Construction Engineering Dept., Egyptian Russian University, Cairo, Egypt
Teaching Assistant, Construction Engineering Dept., Egyptian Russian University, Cairo, Egypt
Abstract: Deterioration of concrete structures throughout the world and the cost of their repair and rehabilitation have become a major concern to engineer and researchers in recent years. Almost cases the repair costs can be twice or more of the original cost. For example, in Canada, it is estimated that the cost of repair of parking garages is in the range of 6 billion dollars, and over 74 billion dollars for all concrete structures. The estimated repair cost for existing highway bridges in the USA is over 50 billion dollars, and 1-3 trillion dollars for all concrete structures. In Europe, steel corrosion has been estimated to cost about 3 billion dollars’ year. Excessive corrosion problem also exists in Arabian Gulf countries (Benmokrane et al., 1998). Organizations, private industry and university researchers are seeking ways to avoid the corrosion problem and thereby eliminate, partially or totally, burden of never ending repair costs. One preferred solution, which has assumed the status of cutting edge research in many industrialized countries, is the use of fiber reinforced polymer (FRP) rebars in concrete. FRP reinforcement has an advantage over steel in that it has high corrosion resistance and a high strength to weight ratio, thus for structures built in or close to seawater or at similar corrosive environment. They are also non-conductive for electricity and non-magnetic. Keywords: Solid plates, Flexure strength, GFRP rebar, Crack pattern.
1. INTRODUCTION In this study, details of the experimental program consisting of testing 12 full scale concrete slabs subjected to moment loading is are presented. The main objectives of the experimental program are: 1) to investigate the behavior of using steel and GFRP bars to enhance the moment strength of reinforced concrete slabs. 2) to optimize the GFRP bars ratio that leads to the ultimate load carrying capacity. 3) To compare between different reinforcement steel and GFRP bars as a main reinforcement in behavior on type of load of light weight concrete slabs one and two way. 4) To address the deformation and ductility behavior of light weight concrete slabs having steel and GFRP bars. 5) To studding behavior of light weight concrete with steel and GFRP bars as a main reinforcement.
2. EXPERMINTAL STUDY The tested specimens were categorized into two groups as shown in Table 1. The first group (Group I) as a one-way slabs had six slabs. Three slabs were reinforced by steel and other three slabs reinforced by GFRP with different ratio of reinforcement. The results of the first three specimens of the Group-I were meant to be the reference for the results of the other specimens. The second group (Group II) has the same parameter of group but with different dimension as a two-way slab. Results of specimens this Groups I,II were used to understand the behavior of concrete slabs having fiber. The slabs in these groups were tested under monotonic load condition. They had different reinforcement ratio with different dimensions of the slab. Table 3.1 summarizes the geometric characteristics of all tested specimens.
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