Full scale testing of precast beam to column connection using billet connector and beam half joint subjected to reversible loading / Wan Norhasiah Wan Bidin

Wan Norhasiah, Wan Bidin (2017) Full scale testing of precast beam to column connection using billet connector and beam half joint subjected to reversible loading / Wan Norhasiah Wan Bidin. Masters thesis, University of Malaya.

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Abstract

Precast beam to column connection is an important element in precast concrete structure, which has significantly influenced the overall structural performance. This connection is used to transfer the shear, bending moment and sometimes torsion between the precast components. This research is to determine the moment resistance and moment rotation characteristic of new proposed precast beam to column connection through three (3) full-scale experimental studies. The specimens used for the testing are similar in geometrical and material properties. From the moment rotation characteristic, it is possible to extract the rotational stiffness, moment capacity and ductility of the connection. The experimental results were validated with existing analytical methods and the connection classification is determined. It is found that the ultimate moment of the connection, MU is greater than the calculated moment resistance, MRC for all specimens with the average value of MU/MRC is 1.21. All the specimens failed beyond the beam-line which means that the connection has sufficient ductility and achieved required strength to be considered as a semi-rigid connection and might be considered as a fully rigid. Based on the connection classification system according to Monforton’s fixity factor, this connection falls in zone III, which is semirigid connection with medium strength. The analytical model overestimates the experimental results due to the omission of mechanical parts contribution such as the horizontal bolt, dowel and billet in calculating the rotation. For failure mechanism, all specimens exhibit plastic hinge formation in the beam at the column’s face which means that the ultimate moment resistance of the beam was reached.

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