Thermal and Durability Considerations for Composite Steel/Concrete Sandwich Structures
B. C. Gerwick, Jr. And D. Berner
Appears on pages(s):
abrasion resistance; composite construction (concrete and steel); concrete durability; corrosion resistance; fatigue (materials); freeze-thaw durability; ice formation; marine atmospheres; offshore structures; sandwich structures; thermal properties; St
Composite steel/concrete sandwich elements are being given intensive research and development efforts because of their excellent structural performance under intense concentrated loads, such as those imposed by sea ice or icebergs. Since the initial applications are expected to be in Arctic and sub-Arctic environments, consideration must be given to thermal phenomena and to insuring long-term durability. Thermal problems addressed include the effects of heat of hydration, with subsequent cooling, freeze-thaw behavior, differential contraction and strain gradients, and low-temperature ductility under impact. Durability problems addressed are corrosion of plates and reinforcement, abrasion and abrasion-corrosion interaction, and fatigue under the continuous crushing of ice. After examining the particular aspects of these considerations in relation to composite elements, recommendations for long-term satisfactory performance are developed as a guide for practical application.