Development and Initial Planning of a New Type Structure for Ocean Space Utilization of Middle Water Professor

新型中水教授海洋空间利用结构的开发与初步规划

基本信息

批准号：
63850092
负责人：
YOSHIDA Koichiro
金额：
$ 17.28万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

项目摘要

Development and fundamental confirmation of structural engineering feasibility of ocean business city complex with population of 30,000 daytime people by using structures in middle waters of 30 to 70 m depth were aimed in this study. The site for construction of this business city complex is assumed to be laid off Tsu city in the Ise Bay. In order to produce the business space at this site, a semisubmersible type of ring-like structure with outer diameter of 1,000 m and inner diameter of 800 m was developed. This ring-like structure is fixed to the sea bed by using concrete supporting structures at the several points.First of all, the meteorological data of the Ise Bay were collected and the maximum expected values were estimated statistically. The wind tunnel tests with a small scale model were carried out to evaluate wind and current forces. A 3D source distrubution method taking wave interaction effects into account was developed for wave force evaluation. The time history of accele … More ration of the E1 Centro earthquake was adopted to evaluate the earthquake responses.The responses to wind and current forces were assumed to be stationary. On the other hand, the responses to wave forces and to earthquake waves were analyzed in the frequency domain and in the time domain, respectively. The results obtained from these response analysis were compared with the design criteria on stress and acceleration initially adopted and it was confirmed that the design proposed in this paper was feasible from the structural engineering view point.In this design, a special type of mechanical connection system between the semisubmersible type of ring-like structure and the concrete supporting structure is adopted, which has such a function that both structures are almost rigidly connected in usual condition, while the connection is released in the severe earthquake case.Finally, it was shown by optimization of the proposed structural system that the number of the supporting structures can be reduced to three. Less

在这项研究中，通过在30至70 m深度的中间水域中使用结构，对海洋商业城市综合体的结构工程可行性的发展和基本确认是针对这项研究的。假定该商业城市综合大楼的建设地点被放置在ISE湾的TSU市。为了在此站点产生业务空间，开发了一种半熟悉的环形结构，外径为1,000 m，内径为800 m。这种环状结构通过在几个点上使用混凝土支撑结构固定在海床上。首先，收集了ISE湾的气象数据，并在统计上估计了最大的预期值。进行了小型模型的风洞测试，以评估风和电流力。考虑到加速的时间历史的3D源分散方法，采用了E1 Centro Earth地震的更多评估来评估地球地震反应。假定对风和电流力的反应是固定的。另一方面，分别在频域和时间域中分析了对波力和地质波浪的响应。将从这些响应分析获得的结果与最初采用的压力和加速度的设计标准进行比较，并证实，本文中提出的设计是从结构工程的角度来看的。在这种设计中，一种特殊的机械连接系统是一种特殊类型的机械连接系统，在半掩盖类型的环形结构和类型的环境中，这两种结构都在这种结构中所采用的连接，这是一种函数，这是一种功能，在这种结构中都具有官能，这是一种功能，这些结构是在函数的，并且是官能化的，这是一种功能，并且是函数的，这是一种函数的，这是一种函数的，这是一种函数的，这是一种函数的，这是一种函数的，并且严重的地震案例。在最终的情况下，通过优化所提出的结构系统来表明辅助结构的数量可以减少到三个。较少的