Taiki Saito

Bio: Taiki Saito is an academic researcher from Toyohashi University of Technology. The author has contributed to research in topics: Earthquake shaking table & Damper. The author has an hindex of 6, co-authored 38 publications receiving 96 citations.

Development of smart systems for building structures

Abstract: Building Research Institute, Japanese Ministry of Construction, initiated a 5-year research and development project of 'Smart Materials and Structural Systems' in 1998 as a part of U.S.-Japan cooperative research efforts. The U.S. Counterpart is the National Science Foundation. Smart Structural Systems (also called as Autoadaptive Media) are defined as systems that can automatically adjust structural characteristics, in response to the change in external disturbance and environments, toward structural safety and serviceability as well as the extension of structural service life. The research and development of (1) concept and performance evaluation of smart structure system, (2) sensing of structure performance, and (3) development and evaluation of structural elements using smart materials will be conducted.© (2000) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Verification of real-time hybrid tests of response control of base isolation system by MR damper comparing shaking table tests

Abstract: Magnetorheological fluid damper (MR damper) has been expected to control the response of civil and building structures in recent years, because of its large force capacity and variable force characteristics. At first, a series of real-time hybrid tests was conducted. The important objective of this paper is to verify the validity of real-time hybrid tests by comparison with the test results of shaking table tests by using the same MR damper. The maximum damping force of the MR damper is 10 (kN), the stroke is 600(p-p) (mm), and the maximum piston velocity is 1(m/s). To determine the control force of the MR damper, optimal control theory and skyhook control were employed. The capability of the MR damper to control the response displacements and accelerations of base isolation system was verified by both shaking table tests and real-time hybrid tests.

Response of High-Rise Buildings under Long Period Earthquake Ground Motions

Abstract: During the 2011 Great East Japan Earthquake, high-rise buildings in Tokyo, Nagoya and Osaka swayed vigorously and caused damage to non-structural elements such as with the falling of ceiling panels. Those cities are located near deep layers of sediment and such conditions can create long period ground motions of low frequency even when far from the epicenter of an earthquake. These low frequency waves can travel backwards and forwards through the sediment upon meeting hard obstacles like rock, creating ground movement that resonates with tall structures causing them to sway and topple. In this report, the performance of high-rise buildings during the 2011 Great East Japan Earthquake is presented first. Then, the safety of high-rise buildings with long period ground motions in a massive earthquake that may arise in the future is discussed.

International Research Projects on Structural Health Monitoring: An Overview:

Abstract: Significant research efforts are presently spent to the problems of health monitoring and damage detection. This paper approaches the subject from the point of view of the organisation of the research. More specifically, it reviews the main international research programs and activities, which are devoted to this topic. Related to this are the questions of the user needs and the deployment of the research results: assuming valid research results are obtained, in what form should these results be deployed to address the user needs. While the focus is on EU-cooperative research, the main US and Far-East activities are briefly discussed as well.