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Seismic Deflection Response of Vibration Control Structures and the Optical Fiber Sensing

振动控制结构的地震偏转响应和光纤传感

基本信息

批准号：
17560502
负责人：
YAMADA Seishi
金额：
$ 2.27万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17560502/
关键词：
vibration control system hysteretic damper steel building cyclic loading test monitoring optic power spectrum fiber optic sensing 建築骨組構造鋼構造光ファイバセンサ制振構造繰り返し実験

项目摘要

Recently, many structural passive control systems have been demonstrated to reduce the response during an earthquake and have gradually been applied to buildings. The authors developed new passive control system using a non-structural flexural yielding beam and the system was recently applied to the six-story office building. The present concept of this control system consists of two kinds of non-structural steel members the one is a brace and the other is of horizontal members, the short span beam. During sway motions the bending strains in this non-structural flexural yielding beam are bigger than those in the structural members. Therefore, this non-structural flexural yielding beam yields earlier than the structural girders or columns and acts as damper absorbing vibration energy by its hysteretic performance. In our previous papers the basic dynamic responses of the test models on a shaking table under sine and random wave motions were demonstrated experimentally and in parallel th … More e earthquake responses of the steel buildings with this system were analyzed This system needs limited special devices and has little influence on the architectural planning. Also as optical fiber Bragg grating sensors were installed on the non-structural flexural yielding beams, the damage level of this system has been assessed even after any earthquake.For practical design it had been necessary to confirm the various details associated with the installation of this system using large scaled specimens. This study deals with the large-sale steel frame specimens tested under static cyclic loading. Shown in this paper are that the experimental results and the idealized theoretical model are consistent The effects of the rigidity, strength and size of the non-structural flexural yielding beam (damper beam) on the equivalent damping factor as a damper as well as on the elastic-plastic hysteretic absorption energy were discussed. The effects of the shape and size of the bending failure beam as a damper on the elastic-plastic hysteretic performance have also been discussed. The optical fiber Bragg grating sensors have been installed on the surface of the beam and the optical power spectra as well as the strain quantities using their outputs have successfully been measured in detail. It has been shown that the spectra change from sharp one-peak type to multi-peak one due to steel yielding. The characteristics would be useful for assessing the damage level after large earthquake. Less

近年来，许多结构被动控制系统已被证明可以减少地震反应，并已逐步应用于建筑物。作者使用非结构弯曲屈服梁开发了新的被动控制系统，该系统最近应用于六层办公楼。这种控制系统的概念由两种非结构钢构件组成，一种是支撑，另一种是水平构件，即短跨度梁。在摇摆运动中，这种非结构性弯曲屈服梁的弯曲应变大于结构构件的弯曲应变。因此，这种非结构弯曲屈服梁比结构梁或柱先屈服，并通过其滞回性能起到吸收振动能量的阻尼器作用。在我们以前的论文中，在正弦和随机波浪运动下，振动台上的试验模型的基本动力响应是通过实验和平行试验证明的。 ...更多信息分析了采用该体系的钢结构建筑的地震反应。该体系所需专用设备有限，对建筑规划影响不大。在非结构性弯曲屈服梁上安装光纤布拉格光栅传感器，即使在地震后也能评估该系统的破坏程度。为了实际设计，有必要使用大比例试件来确定与该系统安装相关的各种细节。本文对大型钢框架试件进行了低周反复静力试验。研究表明，试验结果与理想化的理论模型是一致的。讨论了非结构性弯曲屈服梁（阻尼梁）的刚度、强度和尺寸对阻尼器等效阻尼因子和弹塑性滞回耗能的影响。讨论了作为阻尼器的弯曲破坏梁的形状和尺寸对弹塑性滞回性能的影响。将光纤光栅传感器安装在梁的表面，并成功地测量了光功率谱以及利用其输出的应变量。结果表明，由于钢的屈服，谱从尖锐的单峰型转变为多峰型。这些特征对大震后的震害评估具有一定的参考价值。少