最近，海上和海上混凝土结构没有得到足够的重视，至少在美国是这样。与许多其他类型的混凝土结构相比，这些结构的复杂性和安全问题可能需要更多的关注。此外，海上和海洋混凝土结构物在性质上是如此全球化，因此世界各地对更好地协调和同步设计、施工、检查和维护实践的需求更高。3月24日至28日，在加拿大魁北克省魁北克市举行的2019年春季ACI混凝土大会和博览会上，举行了一场分为两部分的会议，题为“海上和海洋混凝土结构:过去、现在和未来”。会议由ACI委员会357“海上和海洋混凝土结构”赞助，强调了过去、现在和将来的成就- 实践的方向，以及未来的道路。本ACI特别出版物（SP）是会议上提交的精选论文的汇编。所有审稿人为确保本出版物的质量所做的努力都得到了极大的认可。

Offshore and marine concrete structures have not received enough attention in the recent past, at least in the United States. The complexity and safety concerns associated with these structures are such that they probably need more attention compared to many other types of concrete structures. Also, offshore and marine concrete structures are so global in nature that there is a higher need for better coordination and synchronization of design, construction, inspection, and maintenance practices in different parts of the world.A two-part session, titled "Offshore and Marine Concrete Structures: Past, Present, and Future," was held at the Spring 2019 ACI Concrete Convention and Exposition on March 24-28 in Quebec City, Quebec, Canada. The session, sponsored by ACI Committee 357, Offshore and Marine Concrete Structures, highlighted accomplishments of the past, current state-of-the-practice, and a path for the future. This ACI Special Publication (SP) is a compilation of select papers presented at the session. The efforts of all the reviewers in assuring the quality of this publication is greatly acknowledged.