EXPERIMENTAL STUDY OF PRECAST BEAM-COLUMN HIDDEN CORBEL CONNECTION UNDER CYCLIC LOADING

The aim of this study is to investigate the behavior of hidden corbel precast beam to column connection due to cyclic loading by conducting laboratory test. Two types of connections were selected namely monolithic connection and hidden corbel connection. Both of the connections were having the same size of 100 mm x 100 mm x 1200 mm (Base x Width x Height) for column and 100 mm x 100 mm x 550 mm for beam. The monolithic connection acted as a control model with rigid type of connection while hidden corbel was a semi-rigid connection. Both models were subjected to a vertical cyclic loading until 40mm displacement using 500 kN actuator. Hysteresis load versus displacement graphs were generated and the connection behavior for both models were studied in terms of strength, ductility, stiffness and crack patterns. Based on the results, ductility of hidden corbel was equal to 3, which were higher than the monolithic. The hidden corbel connection was also experienced less degradation of stiffness and cyclic strength. This can be proved by less visible crack pattern that occurred at the connection. With that regard, hidden corbel connection model is more suitable to be used for cyclic loading and at the area prone to seismic loading.