Prediction of Twist and Torque of RC Beams of M60 Core Concrete Jacketed with Ferrocement “U” Wraps at Ultimate Stage: Different Methods

Abstract

AbstractIn general, engineers design the structures considering strength at cracking. Still then beyond cracking, the structures are able to sustain more loads. So, determination of ultimate strength is an important parameter in design field. Here, predication of torsional parameters of high strength concrete beams with ferrocement wrap on three sides is evaluated by use of different methods. For strength determination of any structure, the conventional methods employed are experimental or analytical methods. Evaluation of parameters by experimental method involves casting and testing of structures, which is a time-consuming method and uneconomical one. The other conventional method is the analytical one, which needs some computational works to predict the torque and twist. This is also a time-consuming method. The above two methods as not providing some empirical formulas to predict twist and torque, soft computing methods have been employed to overcome the same. MARS and WASPAS soft computing methods are taken here to predict torque and twist. At ultimate stage, the “U” wrapped beams are able to resist torque more than 41.37% than the unwrapped beams, and a completely over-reinforced beam resists 98.01% more than plain “U” wrapped beams. Under-reinforced “U” wrap beams have undergone 23.9 times more twist than that of plain “U” wrap beams. The percentages of increase in torque and twist with “U” wrap provide its rate of success.KeywordsFerro cementU wrapMethod of MARSTorque at ultimate stageTwist angle at ultimate torqueWASPAS method