Study on the structural behavior of flush beam for slim concrete floor
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Study on the structural behavior of flush beam for slim concrete floor R. Ramasubramani1 · M. S. Manoj Kumar1 · J. S. Sundarsan2 · S. Nithiyanantham3 Received: 13 April 2020 / Accepted: 29 September 2020 © Springer Nature Switzerland AG 2020
Abstract The structural behavior of the composite flush beam for slim floor as a whole has been investigated. The deformation behavior of the structural members steel beams with trapezoidal cross sections and specially punched webs were developed as composite beams in slim floors. The estimation of the flexural stiffness and bending capacity of composite slim beams is rather complicated, because the influence of many factors should be taken into account. These factors include variable section dimensions, profile of the beam, stiffness of the beam and interaction between steel and concrete. In this paper, analytical investigations have been conducted to investigate the deflection behavior of flush beam specimens under monotonic loading. A design procedure is developed for composite slim floor flush beams based on cross-sectional analysis, and the flexural properties of the slim floor beams are evaluated. From elastic linear analytical investigation, it was found that the deflection of delta beam is 48% less than the conventional I-beam; moreover, the stiffness of the delta beam is 49.8% higher than the I-beam. Keywords Flush beam · Slim floor construction · Shallow beam
Introduction The demands of long span floors and the requirement of less floor height and for the aesthetic purpose and demand of architectural requirement beams have been increased in recent times. So, the modern construction resulting in the need for slim floor construction with the beam having a depth equal to the depth of the slab for achieving the shallow floor depth has led to the development of various composite floor systems in construction. Moreover, in conventional composite floor systems, the depth of beam section normally increases with the length of the floor spans. This results in * S. Nithiyanantham [email protected]; [email protected] 1
Department of Civil Engineering, SRM University, Kattankulathur, TamilNadu 603 203, India
2
School of Construction Management (SOCM), National Institute of Construction Management and Research(NICMAR), Pune, India
3
Post Graduate and Research Department of Physics, (Ultrasonic/NDT and Bio‑Physics Divisions), Thiru.Vi. Kalyanasundaram Govt Arts and Science College, Bharadhidasan University, Thiruchirapalli, Thiruvarur, Tamilnadu 610003, India
steel I-sections of the beam to ordinate down the floor slab, making the composite beams being heavier and deeper than expected [1, 2]. The flush beam composite floor system has been developed to overcome this problem, and it consists of a steel plate which is welded to form a trapezoidal shape beam embedded within the concrete slab and therefore minimizes the overall floor depth. The flush beams consist of row of circular openings at 300 mm center to center within t
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