Torsion behavior of Steel encased Concrete Composite Beams
ZHAO Jing and CAI Jian lin
DOI:10.11835/j.issn.1674-4764.2009.05.004
Received February 10, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2009,Pages 16-23
- Abstract
In order to study torsion behavior of steel encased concrete composite beams, experiments were carried out with eight specimens. The destruction shape, working mechanism and the crack development and distribution were analyzed under pure torsion and combine torsion conditions. And also the relationships were investigated between torque and torsion ratio, load and strain, bending moment and deflection and load crack. On the basis of elasticity plastic theory, the formulas of cracking torsion were presented for pure torsion and combined torsion of combined beam. And with spatial truss model of variable angle, formulas for ultimate torsion strength of pure torsion and combined torsion were put forward. The predicted results were in good agreement with measured ones. The proposed formulas provided basis for evaluating safety and stability of the structural.