Collaborative Hybrid Experiments on Large Scale Frame Structures at NCREE

Abstract eng:
Four of the networked hybrid experiments are introduced in this paper. The first one is a Taiwan-USA-Japan joint research program. A full-scale three-story three-bay buckling restrained braced (BRB) frame with concrete filled tube (CFT) columns was tested in 2003 using pseudo-dynamic testing (PDT) procedures. Various types of BRB and steel beam-to-CFT column moment connections were investigated in this test. The second one is a Taiwan-USA collaborative substructure PDTs of a full-scale two-story BRB frame subjected to the bi-directional seismic ground motions were conducted in 2005. The performance and the design methodology of BRB-to-gusset plate connections were investigated. The third one is a collaboration of NCREE and Multidisciplinary Center for Earthquake Engineering Research (MCEER) of USA in 2006. A full-scale two-story one-bay steel-plate shear wall frame was pseudo-dynamic tested. The capacity design of columns and beams surrounding the steel-plate shear wall was studied. The design of the restrainers for the steel-plate shear walls was also verified. The last one is a Taiwan-USA cooperative research project, entitled “NEES-SR SG International Hybrid Simulation of Tomorrow’s Braced Frames”. A full-scale two-story steel concentrically braced frame (CBF) was tested under cyclically increasing lateral displacements. Test results confirmed that the two-story X-shape steel CBFs all have good energy dissipation characteristics. Tests also confirmed that both the 2t-linear and 8t-elliptical out-of-plane deformations of the gussets provide satisfactory ductility for the seismic resistant design of steel CBFs. The feature of specimen, test protocols, the details of PDTs as well as the key experimental results of the stated four collaborative hybrid experiments have been webcasted during the tests, and are presented in this paper.

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