강관 Brace 접합부의 내력 및 변형성상에 관한 실험적 연구(II) ( An Experimental Study on the strength and Deformation of Joints in Steel Tubular Braces(II) )

This is a study on the optimum proportionings of Singly reinforced concrete Slab-Band Floor by using SUMT which is considered as one of the most efficient and widely used optimization techniques in the structural optimization. This study is specifically intended to propose a formulation and solution method in order to obtain the optimum steel ratio, steel areas and optimum effective depths of slab,Band, and Marginal beams for the preliminary design of Slab-and Floor systems. The objective functions are formulated as the cost functions by considering the unit cost of concrete. steel and formings. The constraints equations of slab, Band and Marginalbeam sections are derived by including the flexural stress constraints, minimum steel ratio, minimum depth of each sections, and deflection constraints. Thus,Thi s study constitutes a nonlinear programing problem, this nonlinear programing problem is converted to a equivalent optimization problem by using SUMT method and the Newton Raphson method which is well suited for the two variables optimization problem is adopted as the unconstrained minimization techniques for SUMT.