RESEARCH AND DEVELOPMENT OF THREE-DIMENSIONALMEASUREMENT METHOD FOR DYNAMIC DISPLACEMENT INSHAKE TABLE TESTS APPLYING IMAGE PROCESSING TECHNIQUE

摘要

National Research Institute for Earth Science and Disaster Prevention in Japan has been constructed alarge three-dimensional shake table test facility in Kobe prefecture, Japan since 1995. In this shake table,it is purpose to do research a fracturing process of various architectural, civil or mechanical structure byshaking a real scale structural model in three-dimension. Current measurement systems with a contact,however, are not suitable for the measurement such fracturing tests because the test model will be shakenwith large deformation and flexible behavior. Therefore, a new measurement system, which can measure athree-dimensional large deformation without any contact, has been desired. This study has been doingresearch and development of new three-dimensional measurement method using an image processingtechnique to measure the dynamic displacement in shake table test. This measurement system is a veryconvenient system because it can measure the three-dimensional dynamic displacement in shake table testin which the several makers are only attached to the surface of an experimental structure. The systemtherefore is the most suitable measurement system for an evaluation of complex three-dimensionalbehavior of experimental model. Fundamental hardware and software for the measurement system hasbeen constructed until now. The fundamental dynamic measurement accuracy and effectiveness of themeasurement system has been also confirmed from several shake table tests. This paper describes thesynthetic performance of the proposed measurement system, and also the measurement performance inactual fracturing test using the full scale wooden house model which is the second-storey house of aJapanese conventional model.