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

到目前为止，结构健康监测技术主要是针对建筑体系的上部结构进行的。本研究以多层建筑为研究对象，以桩承式建筑体系为研究对象，对建筑体系的上部结构和子结构进行综合健康监测。通过对地震前后建筑体系上部结构和近场地面的振动监测，来识别桩基的地震损伤。提出了一种逐步系统辨识的方法来估算桩在土中的刚度。采用Penzien型桩-土-结构相互作用模型作为数学模型。利用小型实验模型进行了实验验证，验证了辨识方案的有效性。作为可行性研究，还进行了桩基支撑的真实建筑物的现场测量。此外，还开发了一种基于集成振动…的桩基局部损伤检测方法。更多和波浪监测，包括振动器测试，冲击锤测试，声发射测试和超声波测试。试验采用实际PHC桩，对于大跨度屋面建筑，选用多点桁架穹顶体系作为目标结构。屋面节点上分布有多个振动传感器。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。如果子结构发生损伤，则估计子结构损伤的位置和程度。如果不是，则在上部结构中搜索损伤区域。如果将损伤区域与整体结构隔离，则在损伤区域中估计上部结构的位置和程度。为了验证损伤检测方案的有效性，制作了一个小尺寸的实验模型并进行了测量。在实验中，引入了三个方向的传感器来识别三维振型的变化，并使用张力线系统来隔离损伤区域。较少

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