Study on Structures and Equipments Supported on Seismic Isolator

隔震器支撑结构及设备研究

• 批准号: 60550402
• 负责人: KOH Tadaki
• 金额: $ 1.47万
• 依托单位: Meiji 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: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550402/
• 关键词: Seismic isolation supporting systems; Structures; Equipments; Laminated rubber bearings; Dissipators; Seismic response simulation; Floor response spectra; 基礎ロッキング変形

Recently, Researches for seismic isolation systems and the development of the realization of them have been highly activated. The objective of this study lays in searching for the feasible, available and adequate supporting system among various seismic systems limited to the type that can reduce the seismic power by means of providing buildings or machines with very soft springs.Dynamic chraracteristics of multi-storied RC buildings provided with seismic isolation systems, which consists of laminated rubber bearings and some kind of dissipators, are discussed. Viscous, frictional and hysteretic types are adopted as dissipators. Simulations of response to input earthquakes which corresponds to the solid and soft ground have been carried out. The precise parameter study of laminated rubbers and dissipators has been also carried out. Furthermore seismic response of non isolated building is compared with isolated one.Suffice to say that the seismic isolater can reduces the seismic power into the upper part of buildings. The more effective the seismic isolator become, the higher earthquake power level is. From the point of controlling large response displacement which remains after earthquake, it is important how to select the type of dissipators.Response spectra of the floor response obtained in the isolated building reveal that secondary structures and equipments in the building may be made free from severe excitations. Accelaration response spectra, compared with that of the non isolated building, has no distinct predominant frequencys. Especially in the case of frictional dissipators, no narrow band peak appears.Rocking vibrations may be induced by the seismic isolator using laminated rubber bearings. Analysis of rocking vibrations has been also carried out. Quantitative results are obtained.

近年来，隔震系统的研究及其实现方法的发展十分活跃。本文的目的是在各种抗震体系中寻找一种可行的、有效的、适当的支撑体系，这种体系限于通过为建筑物或机器提供非常软的弹簧来降低地震功率的类型，本文讨论了多层钢筋混凝土建筑物设置由叠层橡胶支座和某种耗能器组成的隔震体系的动力特性。采用粘性、摩擦和滞回型消能工。分别对固体地基和软土地基的输入地震反应进行了模拟。对叠层橡胶和消能减震器进行了精确的参数研究。并对非隔震结构和隔震结构的地震反应进行了比较，说明隔震结构能有效地减小地震能量向上部的传递。隔震效果越好，地震功率级越高。从控制地震后残余的大位移反应的角度考虑，如何选择消能工是一个重要问题，隔震建筑的楼层反应谱表明，建筑中的次要结构和设备可以避免强烈的地震作用。隔震反应谱与非隔震反应谱相比，无明显的优势频率。特别是摩擦耗能器，没有出现窄带峰值，叠层橡胶支座隔震器可能会引起摇摆振动。还进行了摇摆振动的分析。获得了定量结果。

项目成果

Arakawa Toshiharu, Koh Tadaki, Ohmata Kenichiro, Shimosaka Haruo, Shimoda hirokazu: "Vibration Characteristics and Earthquake Responses of Structures and Equipments Supported on Seismic Isolator" Proceedings of the Seventh Japan Earthquake Engineering Sym

荒川俊春、光忠木、大间健一郎、下坂春夫、下田弘一：“隔震器支撑结构和设备的振动特性和地震响应”第七届日本地震工程研讨会论文集

洪忠憙,荒川利治,岩本真二,内田治: 日本建築学会大会学術講演梗概集. (1987)

Hong Chung-hye、Toshiharu Arakawa、Shinji Iwamoto、Osamu Uchida：日本建筑学会会议学术讲座摘要（1987）。

荒川利治,洪忠憙,大亦絢一郎,下坂陽男,下田博一: 日本地震工学シンポジウム論文集. 7. 1627-1632 (1986)

Toshiharu Arakawa、Chung-hye Hong、Kenichiro Oi、Haruo Shimosaka、Hirokazu Shimoda：日本地震工程研讨会论文集 7. 1627-1632 (1986)。