Development of an ice shield for offshore concrete structures

基于重力的结构(GBS)混凝土的设计在大西洋的恶劣地区和亚北极项目中非常成功，例如加拿大东海岸的Hibernia(1997年)和俄罗斯萨哈林岛(2005年)。然而，亚北极平台最近的经验表明，确实需要修复混凝土，并为地球科学系统开发一种冰盾保护。 超高性能混凝土(UHPC)的发展被认为是结构工程材料应用中最有前途的技术进步之一。超高性能混凝土具有优异的机械性能和耐久性。这几乎是自食其果。新材料用于新希伯伦GBS屋顶、底板的不同部位。超高性能混凝土具有良好的抗剥落、结痂和碎裂性能，是波浪作用力和飞溅区海冰的理想材料。这种新型材料可以很好地用于海上风力机结构在高弯矩和高剪力作用下的基础。 将与Madera Engineering合作开发用于海上应用的超高性能混凝土冰盾。超高性能混凝土在高应变率响应下的性能将被研究。超高性能混凝土的开裂、受拉和配筋率是在各种荷载作用下进行加固结构设计的重要因素。超高性能混凝土的抗压和抗弯强度将被用来评估动态增长系数(DIF)。超高性能混凝土板在动态低速冲击下的结构性能将被试验和数值研究，使用不同的配筋率用于海上应用。超高性能混凝土板盾构的成功开发将导致进一步的研究合作， 由于Madera目前参与了与石油和天然气设备的海底盾牌保护有关的其他研究项目。

The design of Gravity Based Structure (GBS) concrete has been very successful in hostile areas of the Atlantic Ocean and sub-Artic projects such as Hibernia (1997) on the east coast of Canada and Sakhalin Russian island (2005). However, the recent experience for the sub-Artic platforms indicated a definite need for concrete repair and the development of an ice shield protection for the GBS. The development of Ultra High Performance Concrete (UHPC) is deemed as one of the most promising technological advances in material applications suitable for structural Engineering. UHPC exhibits exceptional mechanical and durability properties. It is almost self-placing. The new material is used for different parts on the roof, base slab of the new Hebron GBS. UHPC has an excellent resistance to spalling, scabbing, and fragmentation, making it an ideal material for wave forces and sea ice for the splash zone. The new material is very well used for offshore wind turbine structures foundation under high moment and shear forces. An UHPC ice shield will be developed in collaboration with Maderra Engineering for offshore application. The performance of the UHPC under high strain rate response will be investigated. Cracking, tension and reinforcement ratio of UHPC are important factors in designing any reinforced structure under various kinds of loading. Compressive and flexural tensile strengths of UHPC will be investigated to evaluate the Dynamic Increase Factor (DIF).The structural behavior of UHPC plate under dynamic low speed impact will be investigated experimentally and numerically using variety of steel reinforcement ratio for offshore applications.The successful development of the UHPC plate shield will lead to further research collaboration, since Maderra is currently involved in other research projects related to subsea shield protection for oil and gas equipment.