DEVELOPMENT OF STRUCTURAL HEALTH MONITORING SYSTEM BY PEAK HOLD SENSOR AND ITS APPLICATION AND VERIFICATION IN REAL BUILDINGS

Abstract

A simple and easy-to-use structural health monitoring system for a quick inspection of structural health just after large earthquakes is developed. The monitoring system consists of a displacement peak hold sensor and a wireless data acquisition system. The peak hold sensor is able to memorize maximum, residual, and cumulative displacement of structural deformation without any external power supply. The monitoring system has been already applied to over 20 buildings, and some of the systems verified its effectiveness at the large earthquakes, such as the 2011 off the Pacific coast of Tohoku Earthquake.