Experimental investigation on anti-torsion performance of welded stud steel reinforced concrete beams
Chen Zongping1,2 Chen Yuliang1 Zhong Ming1,3
1. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;
2. Key Laboratory of Disaster Prevention and Structural Safety of the Ministry of Education, Guangxi University, Nanning 530004, China;
3. Nanning Audit Bureau, Nanning 530022, China
Abstract：In order to reveal the anti-torsion performance of welded stud steel reinforced concrete (SRC) beams, a set of test device was designed, and nine specimens (including seven welded stud SRC specimens, one traditional SRC specimen and one reinforced concrete (RC) specimen) were prepared for the experimental study. In this work, the results of an experimental study of anti-torsion behavior of SRC beams under pure torsion are presented. Four parameters: the welded stud’s location, spacing, stud’s diameters and lengths were considered in the test. The effects of these parameters on the cracks, failure modes, torque-torsion ratio curves, ultimate torsion bearing capacity were discussed. The results demonstrate that all of specimens fail after the appearance of spiral cracks, and welded stud SRC specimens have more fine and dense cracks, higher anti-torsion bearing capacity and better ductility than the normal SRC specimen. Studs welded in web have better anti-torsion performance than in flange, and within a certain range, increasing the stud’s length and diameter can improve the anti-torsion performance of specimens. In the end, the calculation method of improved superposition was proposed, and the calculation values agree well with the test results.
