en Optimal design Optimal design پژوهشي Research <p><span style="font-size: 11pt; color: rgb(0, 0, 0);">This paper deals with the effect of fiber aspect ratio of steel fibers on shear strength of steel&nbsp;<span style="font-size: 11pt;">fiber reinforced concrete deep beams loaded with shear span to depth ratio less than two using&nbsp;<span style="font-size: 11pt;">the artificial neural network technique. The network model predicts reasonably good results&nbsp;<span style="font-size: 11pt;">when compared with the equation proposed by previous researchers. The parametric study&nbsp;<span style="font-size: 11pt;">involves deep beams of M55 grade concrete with fiber volume fraction 0.5% to 2% of fiber&nbsp;<span style="font-size: 11pt;">aspect ratio ranging from 50 to 100 and longitudinal steel percentage varying from 0% to&nbsp;<span style="font-size: 11pt;">2.5%. The analysis reveals that the fiber aspect ratio also affects the shear strength and needs&nbsp;<span style="font-size: 11pt;">to be combined with fiber volume fraction.</span></span></span></span></span></span></span></span><br style="line-height: normal; orphans: 2; text-align: -webkit-auto; widows: 2;" > &nbsp;</p> fiber aspect ratio, steel fibre reinforced concrete, volume fraction, deep beam, shear span, neural network. 81 91 http://ijoce.iust.ac.ir/browse.php?a_code=A-10-66-127&slc_lang=en&sid=1 U. Naik 180031947532846001063 180031947532846001063 Yes S. Kute 180031947532846001064 180031947532846001064 No