Behaviour of Steel Fibre Reinforced Rubberized Continuous Deep Beams

International Conference on Recent Advances in Materials, Mechanical and Civil Engineering

材料科学;机械制造;土木建筑工程

Sandeep, M.S.^1 ; Nagarajan, Praveen^1 ; Shashikala, A.P.^1

Department of Civil Engineering, NIT Calicut, Kerala, India^1

关键词: Cementitious composites;    Compressive and tensile strengths;    Continuous deep beams;    High rise building;    Lifeline structures;    Seismic Performance;    Structural elements;    Undesirable effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/330/1/012125/pdf
DOI  :  10.1088/1757-899X/330/1/012125

来源: IOP

【 摘 要 】

Transfer girders and pier caps, which are in fact deep beams, are critical structural elements present in high-rise buildings and bridges respectively. During an earthquake, failure of lifeline structures like bridges and critical structural members like transfer girders will result in severe catastrophes. Ductility is the key factor that influences the resistance of any structural member against seismic action. Structural members cast using materials having higher ductility will possess higher seismic resistance. Previous research shows that concrete having rubber particles (rubcrete) possess better ductility and low density in comparison to ordinary concrete. The main hindrance to the use of rubcrete is the reduction in compressive and tensile strength of concrete due to the presence of rubber. If these undesirable properties of rubcrete can be controlled, a new cementitious composite with better ductility, seismic performance and economy can be developed. A combination of rubber particles and steel fibre has the potential to reduce the undesirable effect of rubcrete. In this paper, the effect of rubber particles and steel fibre in the behaviour of two-span continuous deep beams is studied experimentally. Based on the results, optimum proportions of steel fibre and rubber particles for getting good ductile behaviour with less reduction in collapse load is found out.