FULL-SCALE IMPLEMENTATION OF ACTIVE CONTROL .2. INSTALLATION AND PERFORMANCE

An active bracing system has been designed, fabricated, and installed in a full-scale dedicated test structure in Tokyo, Japan, for structur al-response control under seismic loads. In 1991, Soong et al. present ed the design of the system along with simulation studies for the desi gn earthquake. Presented in this paper, which is the second part of th e sequence, are: (1) The description of the constructed system; and (2 ) the observed performance of the system under two actual earthquakes and other artificial loadings. Installation details of the system in t he building structure are presented along with the selections for fail -safe shutdown operations in case of malfunctions. Also presented are the procedures for proper maintenance and self-testing, which ensure c ontinuous control with minimal resources. The observed performance und er artificial loadings and actual ground motions is compared with the estimated analytical response.