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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

结构健康监测技术目前主要是针对建筑体系的上部结构而发展起来的。本研究针对多层建筑，以桩承结构为目标结构，探讨建筑系统上下层结构之整合健康监测。通过地震前后上部结构和建筑物近场地面的振动监测，识别桩基的地震损伤。一步一步的系统识别方法，制定估计桩刚度的土壤。数学模型采用Penzien型桩-土-结构相互作用模型。通过一个小尺度的实验模型进行了实验验证。桩支撑的真实的建筑物的现场测量也进行了可行性研究。此外，本文还提出了一种基于综合振动的桩基局部损伤检测方法 ...更多信息波浪监测包括振动台试验、冲击锤试验、声发射试验和超声波试验。试验以真实的PHC管桩为对象，针对大跨度屋盖结构，选取多点支承桁架穹顶结构体系为研究对象。多个振动传感器分布在屋顶节点上。提出了一种聚焦策略来检测整个系统的损伤。第一步是判断损伤是发生在上部结构还是下部结构。如果子结构中发生损伤，则估计子结构损伤的位置和程度。如果没有，则在超结构中搜索损伤区域。若将损伤区域从整体结构中分离出来，则可在损伤区域内估计上部结构的位置和范围。为了验证损伤检测方案，一个小尺度的实验模型的制造和测量。在实验中，三个方向的传感器被引入到识别的三维振型的变化和张力线系统被用来隔离的损伤区域。少