BEHAVIOR OF COMPOSITE I-SECTION MODIFIED REACTIVE POWDER CONCRETE BEAMS WITH ULTIMATE TORQUE

Abstract

This paper presents experimental work including the investigation of seven composite modified reactive powder concrete (MRPC) I- beams, 1300mm length, 100mm web width, and 320mm height, with and without opening tested under pure torsion. The first beam was the control beam without steel plate and the second beam was solid with steel plate the five of these beams were cast as composite beams and opened in the web. The main variable was the location, shape, and size of the opening on the web. The experimental results show that the web opening decreases the ultimate torque of composite beams in the range of 17.6% to 30.8% for the tested specimens. As well as, the results show that the used steel plates increase the ultimate torque of composite beams by 7.7%.