Title: STUDY ON OPTIMIZATION FOR SYSTEM RELIABILITY OF SOIL-SUPPORTED BRIDGE STRUCTURE ON PILED FOUNDATION
Abstract: According to present designing practice for soil-supported structures, superstructure and foundation are separately considered. This design procedure may lead to number of engineering and economical disadvantageous. This paper is discussed optimization of soil-supported structures considering superstructure and foundation as a system. In the developing of this method, load deformation relationship for both vertical and horizontal directions are considered. For the optimum system, the expected total cost is considered among various optional system designs. A case of soil-supported bridge structure on a piled foundation is also discussed using the proposed method and the optimum safety factor for the system are selected based on system reliability.