王双妍¹，王忠全²
(1 同济大学建筑设计研究院，上海200092；2 同济大学土木工程学院，上海200092)

[摘要] 杭州湾跨海大桥海中平台结构由浅海高桩平台、上部多层框架以及屋顶异形三层网架组成，结构形式复杂，整体分析难度大。本文着重介绍了采用合理的假定以及简化，用整体结构分析的方法完成对这种特殊结构的分析计算，并与水工专业的分析结果进行了比较，认为是合理可靠的，对同类结构的分析处理有一定参考作用。
[关键词]  海中平台；钢结构；整体分析

    Structure Analysis of a Large Steel Offshore Platform
    Wang shuangyan¹, Wang zhongquan²
    (1 Architectural Design & Research Institute of Tongji University, Shanghai 200092 China; 2 Civil Engineering College, Tongji University, Shanghai 200092, China)

Abstract: Taking the Hangzhou Bay Sea-Crossing Bridge offshore platform as an example,the integral analysis of a kind of multi-storey steel building with triple-layer space trusses is introduced. Considering the characters of the platform, by assumption and reasonable predigestion, the platform structure is analyzed and results are compared. The analysis experience can be a reference for similar engineering.
Keywords: offshore platform; integral structure analysis; steel structure