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敌对地区和亚北极地区的项目中非常成功，例如加拿大东海岸的希伯尼亚（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，确实需要对 GBS 进行混凝土修复和开发冰罩保护。 超高性能混凝土（UHPC）的开发被认为是结构工程材料应用中最有前途的技术进步之一。 UHPC 具有卓越的机械和耐久性能。它几乎是自动放置的。新材料用于新希伯伦 GBS 屋顶、底板的不同部位。 UHPC 具有出色的抗剥落、结痂和碎裂性能，使其成为浪花力和飞溅区海冰的理想材料。这种新材料非常适合用于承受高力矩和剪切力的海上风力涡轮机结构基础。 将与 Maderra Engineering 合作开发用于海上应用的 UHPC 冰盾。将研究 UHPC 在高应变率响应下的性能。 UHPC 的开裂、拉力和配筋率是设计各种荷载下任何加固结构的重要因素。将研究 UHPC 的压缩和弯曲拉伸强度，以评估动态增加系数 (DIF)。将使用海上应用的各种钢筋比，对 UHPC 板在动态低速冲击下的结构行为进行实验和数值研究。UHPC 板盾构的成功开发将导致进一步的研究合作， 由于马德拉目前正在参与与石油和天然气设备海底盾构保护相关的其他研究项目。

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.