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BASIC RESEARCH ON RESPONSE-CONTROL BUILDING STRUCTURES WITH YIELDING BASE PLATES AS ROCKING STRUCTURAL SYSTEMS

以屈服底板为摇摆结构体系的响应控制建筑结构基础研究

基本信息

批准号：
14550585
负责人：
MIDORIKAWA Mitsumasa
金额：
$ 2.62万
依托单位：
BUILDING RESEARCH INSTITUTE
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550585/
关键词：
Rocking vibration Up-lift Base plate yielding Seismic response reduction Shaking table test Simplified response prediction ベールプレート降伏

项目摘要

It has been pointed out that the effects of rocking vibration (up-lift response) may reduce the seismic damage of buildings subjected to strong earthquake ground motions. Based on this knowledge, the rocking structural systems have been developed that can cause rocking vibration under appropriate control during earthquakes.In this study, the seismic performance of the rocking structural systems with yielding base plates is examined.The seismic response of the base plate yielding systems is examined comparing with those of the fixed-base systems by shaking table tests that are carried out using a three-story braced steel frame of a half scale. The yielding base plates are installed at the bottom of each column at the first story of the test frame. Furthermore, the column bases including yielding base plates are tested statically under simultaneous loading of axial and shear forces from a column.The results of this study are summarized as follows :1)Yielding base plates are successfully applicable to put rocking structural systems into practice.2)The base plate yielding systems are able to reduce effectively the seismic responses of building structures. The energy dissipation of yielding base plates is effective in reducing the response displacements.3)The maximum axial force of a column may be affected by the impact at the time of landing of base plate. According to the tests and numerical analysis, the axial forces in compressive columns reach two times those of tensile columns.4)The shear at the base offrame is transmitted reliably through the yielding base plates during the up-lift motion.5)The simplified prediction method of seismic response of base-plate-yielding rocking systems is proposed.6)The hysteretic behavior of yielding base plates is made clear by the static loading tests.

研究表明，在强震地面运动作用下，振动效应（上扬反应）可以减小建筑物的地震损伤。基于这一认识，在适当的控制下，可以在地震中引起摇摆振动的摇摆结构系统已经被开发出来。本文研究了带屈服底板的摇摆结构体系的抗震性能。通过采用三层半比例支撑钢框架进行的振动台试验，比较了基础板屈服体系与固定基础体系的地震反应。屈服底板安装在试验框架的第一层每根柱的底部。此外，包括屈服底板在内的柱基础在柱的轴力和剪力同时荷载下进行了静力试验。研究结果总结如下：1)屈服底板成功地应用于摇摆结构体系的实际应用。2)底板屈服体系能有效降低建筑结构的地震反应。屈服基板的能量耗散对减小响应位移是有效的。3)柱的最大轴力可能受底板落地时的冲击影响。试验和数值分析表明，受压柱的轴力是受拉柱的2倍。4)抬升过程中，基架处的剪力通过屈服底板可靠传递。(5)提出了底板屈服晃动体系地震反应的简化预测方法。6)通过静载试验，明确了屈服基板的滞回特性。