A study on the Analysis and Design of Grillages under the Worst Point Load

초록

Grillage is common types of structures in marine and land-based structural system such as ships, offshore structures, bridges, buildings etc. The main objective of this paper is to find the maximum stress point in grillage(grid) system under moving point load. To find the worst load point, a moving point load is applied to along the vertical and horizontal beams around mid-spans. Direct stiffness method and FEM are used as analysis tool. Structural model tests are also carried out to confirm the theoretical analysis results. To find the optimum arrangement of grid system under a given point load, an optimization technique is applied. In this case, the minimum weight is the objective function and allowable stress, deflection and other dimension limitations are constraints.