Earthquake Response Characteristics and Seismic Performance of Low and Medium Rise Buildings based on Strategic Observation Program and Damage Investigation

基于新提出的地震观测方案，研究了中低层建筑的地震反应特性。低、中高层建筑的自振特性和抗震性能受到多种因素的影响，如油-结构相互作用、非结构构件的影响、扭转等空间振动、相邻结构引起的结构-土-结构相互作用以及阻尼等。为了明确和单独地对这些特性进行实验研究，“战略”观察包括：1）建筑物的不同施工阶段，2）具有不同基础和结构类型组合的建筑物，3）具有正在施工的相邻建筑物的建筑物，4）具有不同高度和结构类型且土壤条件几乎相同的建筑物，（5）上部结构类型相同、土质条件不同的建筑物等，并进行了密地脉动观测。通过对实测数据的分析，着重讨论了土-结构相互作用对低、中高层建筑的影响，研制了新型的建筑工地地震观测设备，采用电池和局域网连接进行数据采集。开发了基于Web的建筑物观测记录和规格数据库，并具有数字数据下载功能。开发了真实的建筑物空间振型和响应波形的实时在线监测系统，该系统不仅可用于结构工程，而且可用于灾害信息系统。

Based on newly proposed earthquake observation programs, earthquake response characteristics of low and medium-rise buildings were investigated. Vibration characteristics and seismic performance of low and medium-rise buildings are influenced of the various effects such as the oil-structure interaction, effect of non-structural members, spatial vibration including torsion, structure-soil-structure interaction caused by closely built adjacent structure, and damping. To investigate experimentally such characteristics clearly and separately, the "strategic" observation includes such as : 1)various construction stage of a building, 2)buildings which have different combination of foundation and structural type, 3)a building which has constructing adjacent building, 4)buildings which have different height and structural type with almost same soil condition, and 5)buildings with the same type superstructure with various kinds of soil conditions, etc. Dense microtremor observation is also conducted. From analysis of observed data, the effect of soil-structure interaction for low and medium-rise buildings was especially discussed.New equipments for earthquake observation at construction site were developed with butteries and LAN connection for data acquisition. Web based database on observed records and specification of the buildings was developed with digital data download function. Real time online monitoring system was also developed for spatial vibration shapes and response wave data of a building, which is effective not only for use of structural engineering but also for disaster information system.