9. On the Composite Prestressed Concrete/Steel Structural Module

概要

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The authors have developed a composite prestressed concrete/steel structural module for the supporting elements of offshore structures. The composite structural module is composed of biaxially prestressed concrete and a steel frame surrounding the concrete. The prefabricated composite structural modules are joined together to build a main structure by welding the steel frames. The joint between the composite modules is simpler and more reliable than those of conventional concrete structures. The authors carried out investigations into the stresses and deformation of the composite modules during prestressing, and into the strength of the composite module under shearing, force bending moment or combined bending and shear. The authors developed methods for the ultimate strength analysis and the non-linear analysis using the finite element method. A comparison of calculated and observed results shows good agreement. It was shown by the laboratory data and theoretical analyses that the composite module offers the advantage of increased ultimate strength, reliable joint properties and the simplified fabrication and assembly techniques.
社団法人日本船舶海洋工学会の論文