STUDY ON THE MECHANICAL PROPERTIES OF REINFORCED CONCRETE EXTERIOR BEAM-COLUMN JOINTS UNDER DYNAMIC LOADING

Abstract

Dynamic and static loading tests were conducted to evaluate the seismic performance of reinforced concrete exterior beam-column joint at the lower story of high-rise buildings. Eight sets of two specimens each with the same dimensions and details were prepared for the dynamic and static tests. Variable parameters of these specimens were three, that is, (1) ratio of the ultimate shear strength of the beam-column joint to the bending yield strength of beam, (2) anchoring method of main reinforcements of beam: mechanical anchor and U shaped anchor, (3) axial load of column: constant axial load and fluctuating axial load. Influence of loading rate increase on the failure process, ultimate strength and deformation performance was investigated, comparing the dynamic and static test results under various conditions.