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

迄今为止，结构健康监测技术主要是针对建筑体系上部结构进行的。本文研究了建筑体系上部和下部结构的综合健康监测。对于多层建筑，选择桩支撑建筑体系作为目标结构。通过对建筑体系上部结构和近场地面在地震前后的振动监测，识别桩基的震害。提出了一种分步系统辨识方法来估计桩在土中的刚度。采用penzien型桩-土-结构相互作用模型作为数学模型。利用小型实验模型对该识别方案进行了实验验证。此外，还对实际的桩基建筑进行了实地测量，作为可行性研究。此外，还开发了一种基于振动源试验、冲击锤试验、声发射试验和超声波试验的综合振动与波浪监测的桩基局部损伤检测方法。试验是针对实际PHC桩进行的。对于大跨度屋面建筑，选择多支撑桁架穹顶体系作为目标结构。在顶板接缝处分布有多个振动传感器。提出了一种从整体系统检测损伤的聚焦策略。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。如果不存在，则在上部结构中搜索损坏区域。如果损伤区域与整体结构隔离，则估算上部结构在损伤区域内的位置和范围。为了验证损伤检测方案的有效性，制作了小型实验模型并进行了测量。在实验中，引入了三方向传感器来识别三维模态振型的变化，并使用张力丝系统来隔离损伤区域。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