Fundamental study on failsafe structural systems against large earthquakes using uplift mechanism

利用抬升机制抗大地震故障安全结构体系的基础研究

基本信息

批准号：
18560572
负责人：
AZUHATA Tatsuya
金额：
$ 2.57万
依托单位：
National Institute for Land and Infrastructure Management
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560572/
关键词：
Uplift Fail safe Large earthquake Shaking table test Vibration control system

项目摘要

This study aims to investigate possibility and efficiency of a failsafe structural system using uplift mechanism to make buildings safety even against larger earthquake response effects than those estimated with ordinal seismic design codes. Previous studies have cleared that rocking vibration accompanied with uplift motion might reduce the seismic damage of buildings subjected sever earthquake motions. The proposed fat-1mi. system is based on this knowledge. This system shows seismic response characteristics of a fixed column base system under certain seismic input leveL But it starts rocking once the seismic input level exceeds the limit. Uplift response due to the rocking will restrain ascent of seismic input to the structures.Firstly, to introduce uplift mechanism to building structures, the following research items were studied.1) Steel frame systems utilizing uplift mechanism2) Restoring force characteristics of column bases to make steel frames upliftSecondary, to develop more appropriate seismic performance evaluation methods for rocking structures, the following research items were studied.3) Seismic lateral force distribution of rocking structures4) Effect of floor incline during an earthquake to indoor objects in rocking structures Finally, the following research item was studied based on earthquake response analyses using simplified building structural models.5) Efficiency of the proposed failsafe system using uplift mechanism against sever earthquake ground motionsThrough these studies, some frame systems and structural members for rocking structures were proposed and uplift response characteristics were analyzed quantitatively. And the efficiency of the proposed failsafe system against sever earthquakes was confirmed. When we apply this system to buildings with a high aspect ratio, it can provide them superior seismic performance, which is almost equal to that of passive vibration control systems with hysteresis dampers.

这项研究旨在调查使用隆起机制的故障安全结构系统的可能性和效率，即使是对地震响应效应更大的效应，也比使用顺序地震设计代码估计的响应效应更大。先前的研究清除了伴随着隆起运动的摇动振动可能会减少发生严重地震运动的建筑物的地震损伤。提出的脂肪1MI。系统基于此知识。该系统在某些地震输入水平下显示了固定柱基本系统的地震响应特征，但是一旦地震输入水平超过限制，它就会开始摇摆。 Uplift response due to the rocking will restrain ascent of seismic input to the structures.Firstly, to introduce uplift mechanism to building structures, the following research items were studied.1) Steel frame systems utilizing uplift mechanism2) Restoring force characteristics of column bases to make steel frames upliftSecondary, to develop more appropriate seismic performance evaluation methods for rocking structures, the following research items were studied.3) Seismic摇摆结构的横向力分布4）地震在地震期间倾斜的影响摇摆结构中的室内物体的影响最终，根据地震响应分析研究了以下研究项目，使用简化的建筑物结构模型根据地震响应分析进行了研究。5）拟议的故障防护系统的效率。定量。并且确认了拟议的防止严重地震的故障安全系统的效率。当我们将该系统应用于具有高纵横比的建筑物时，它可以为它们提供出色的地震性能，这几乎等于具有滞后阻尼器的被动振动控制系统。