Shear design of civil engineering structures in nuclear power plant under seismic load.

地震荷载作用下核电厂土木工程结构的剪力设计

基本信息

批准号：
02650334
负责人：
HIGAI Takeshi
金额：
$ 1.28万
依托单位：
Yamanashi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650334/
关键词：
Nuclear power plant Under ground RC structures Earth pressure Seismic loads Shear failure Design method 地中構造物

项目摘要

Among the outdoor important civil engineering concrete structures in nuclear plants, there are many RC box structures such as water intake pits, that are consisted by relatively slender walls and slabs and subjected to earth pressure and seismic load. The author tried to bring this type of RC structures into focus. The purposes of this study are to clarify the shear failure behavior of this type of structures, and to develop a rational design method of the structures against the shear forces. Main conclusions of this study are as follows ;1. Development of a calculating method of shear strengthDlviding the RC member, which has a inflection point of bending moment, into a few simple systems, and substituting the uniformly distributed load into a group of concentrated loads, and then adopting the "Zone strength equation", which has been proposed by the author, shear strength of the RC member and the location of critical shear crack can well be estimated.This method is named "Zone strength method". The adaptability of zone strength method is proved by the experimental results.2. Simplified method for design useThough Zone strength method is expected to be applicable to various loading conditions, it might be sometimes inconvenient in adopting the practical design. A simplified method for calculating the shear strength, using equivalent concentrated loads and equivalent shear span lengths, is also proposed for the practical design use.

核电站室外重要土木工程混凝土结构中，有很多取水坑等钢筋混凝土箱体结构，其由相对细长的墙体和板组成，承受土压力和地震荷载。作者试图将这种类型的钢筋混凝土结构纳入关注范围。本研究的目的是阐明此类结构的剪切破坏行为，并开发一种合理的结构抗剪力设计方法。本研究的主要结论如下： 1．抗剪强度计算方法的发展将具有弯矩拐点的RC构件分解为几个简单的系统，将均匀分布荷载代入一组集中荷载，然后采用“区域强度方程”，作者提出的这种方法可以很好地估计钢筋混凝土构件的抗剪强度和临界剪切裂纹的位置。这种方法被称为“区域强度法”。实验结果证明了区域强度法的适应性。 2．设计使用的简化方法虽然区域强度法预计适用于各种载荷条件，但在实际设计中采用有时可能会不方便。还提出了一种使用等效集中荷载和等效剪跨长度计算抗剪强度的简化方法，以供实际设计使用。