Research On Distributions Of Lateral Load For Dry Dock Piers

Dry dock is a form of ship building and repair buildings. Dock piers are one kind of buffer between hull and dry dock floor. The layout of dock piers is one important influencing factor for dry dock design, which is essential to the force of dry dock and hull. However, dock piers distribution is an important indicator for layout of dock piers. This paper aims to study lateral load distributions of dock piers and give some conclusions.Current dry dock design specification was promulgated in1987. Lateral load distributions of dock piers was given according to investigation of domestic docks and reference of Japanese early studies. It’s incomplete on lateral load distributions of dock piers, which only gave two values about side pier and intermediate pier. Single-hull ships have been gradually replaced by double-hull ones. Hull structure has changed greatly. The style of dock piers layout also has been some changes. Thus, current dry dock design specification cannot no longer completely meet the design and construction of dry dock. It’s imperative to revise current dry dock design specification.This thesis selects four representatives of ships. They are300000DWT crude oil ship,150000-ton of bulk cargo ship,110000-ton of refined oil ship and50000-ton container ship. Finite element model of standard section of hull and dock piers are built by ANSYS according to structural design of these ships. Then this thesis analyzes load distributions of dock piers under different working conditions of self-weight and ballast water.This paper sums up lateral load distribution factor of dock piers under a variety of conditions according to results of analysis, makes a comparison with current dry dock design specification and explores the current status of dock piers load distribution to reference for revise of current dry dock design specification and construction of dry dock.