DESIGNS OF CONCRETE BRIDGES WITH MULTIPLE BOX CELLS DUE TO TORSION USING SOFTENED TRUSS MODEL

Using a softened truss model, this paper presents a method for torsion al design of multicell concrete bridges. Earlier researchers have succ essfully shown the development for solving single cell torsion by comb ining the equilibrium, compatibility, and the softened constitutive la ws of concrete. By solving the simultaneous equations based on the mem brane analogy, multicontinuous or separate cells can be solved.