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，结构性健康监测技术主要是用于建筑系统的超结构的开发。这项研究与建筑系统超级和子结构的综合健康监测有关。在多层建筑物的情况下，选择了桩支持的建筑系统作为目标结构。地震事件发生前后的超结构和建筑系统的近场地面，从桩基础的地震损害进行了鉴定。制定了逐步的系统识别方法，以估计土壤中的桩刚度。 Penzien型桩土结构相互作用模型用作数学模型。进行实验验证以使用小规模的实验模型来验证识别方案。桩支持的实际建筑物的现场测量也是作为可行性研究进行的。此外，使用集成振动的局部损坏检测是对桩基础开发的……更多和波浪监测，其中包含振动发生器测试，冲击锤测试，声学发射测试和超声波波测试。实验是针对真实PHC钢琴进行的。在大型屋顶建筑物的情况下，选择了多支撑的桁架圆顶系统作为目标结构。许多振动传感器分布在屋顶接头上。提出了一种聚焦策略来检测整个系统的损害。第一步是判断超结构或子结构中是否损坏。如果在子结构中发生损坏，则估计子结构损坏的位置和程度。如果没有，则在超结构中搜索损坏区域。如果损坏区域与整体结构分离，则在损坏区域估计上层建筑的位置和范围。为了验证损伤检测方案，制造并测量了一个小规模的实验模型。在实验中，引入了三个方向传感器，以确定三维模式形状的变化，并使用张力线系统来隔离损伤区域。较少的