Study on Integrated Health Monitoring of Super- and Sub-structures of Building System Using Vibration Monitoring

建筑系统上下结构振动监测一体化健康监测研究

基本信息

批准号：
14550582
负责人：
HAMAMOTO Takuji
金额：
$ 2.5万
依托单位：
Musashi Institute 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：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

项目摘要

Structural health monitoring technology has been mainly developed for super-structures of building system so far. This study is concerned with an integrated health monitoring of super- and sub-structures of building system.In the case of multistory buildings, pile-supported building systems are selected as target structures. Seismic damage of pile foundations is identified from vibration monitoring of super-structure and near-field ground of building systems before and after earthquake events. A step-by-step system identification approach is formulated to estimate pile stiffness in the soil. A Penzien-type pile-soil-structure interaction model is used as a mathematical model. Experimental verification is performed to validate the identification scheme using a small-scaled experimental model. Field measurements of pile-supported real buildings are also carried out as feasibility studies. In addition, a local damage detection of pile foundations is developed using an integrated vibration … More and wave monitoring, which contains vibration generator test, impact hammer test, acoustic emission test and ultrasonic wave test. The experiment is carried out for real PHC piles.In the case of large-span roof buildings, multi-supported truss dome systems are selected as target structures. A number of vibration sensors are distributed on the roof joints. A focusing strategy is proposed to detect damage from the overall systems. The first step is to judge whether damage occurs in the super-structure or sub-structure. If damage occurs in the sub-structure, the location and extent of sub-structure damage are estimated. If not, the damage region is searched for in the super-structure. If the damage region is isolated from the overall structures, then the location and extent of superstructure are estimated in the damage region. To validate the damage detection scheme, an small-scaled experimental model is fabricated and measured. In the experiment, three-directional sensors are introduced to identify the change in three dimensional mode shapes and tension-wire systems are used to isolate the damage region. Less

迄今为止，结构健康监测技术主要针对建筑系统的上部结构进行开发，本研究涉及建筑系统的上部结构和下部结构的综合健康监测。对于多层建筑，桩支撑建筑系统。通过对地震前后建筑系统的上部结构和近场地面的振动监测来识别桩基的地震损伤，制定了逐步系统识别方法来估计桩基的刚度。土壤。采用 Penzien 型桩-土-结构相互作用模型作为数学模型，利用小规模实验模型对识别方案进行了验证，并进行了桩支撑真实建筑物的现场测量作为可行性研究。此外，还开发了一种采用振动与波一体化监测的桩基局部损伤检测方法，其中包括振动发生器测试、冲击锤测试、声发射测试和超声波测试，并针对真实的PHC桩进行了实验。如果是针对大跨度屋顶建筑，选择多支撑桁架穹顶系统作为目标结构，在屋顶接缝上分布多个振动传感器，提出了检测整个系统是否损坏的聚焦策略。损坏发生在上部结构或下部结构中，如果损坏发生在下部结构中，则估计下部结构损坏的位置和程度，如果没有，则在上部结构中搜索损坏区域。损伤区域与整体结构隔离，则为了验证损伤检测方案，我们制作并测量了小型实验模型，在实验中引入了三向传感器来识别三维振型的变化。和张力线系统用于隔离损坏区域。