Seismic Performance of Precast Concrete Frame Beam-Column Connections with High-Strength Bars

Abstract

As the construction industry is striding towards the industrialization of green buildings, a precast concrete frame beam-column joint with high-strength reinforcement was proposed. Simulate reversed cyclic loading was carried out on two precast connections and one cast-in-place connection to examine the seismic behavior of the proposed new precast connection. The main test variables between the two precast connections were the strength of the reinforcement at the bottom of the beam. The failure shape, hysteresis curve, skeleton curve, strength, deformation ability, stiffness degradation, and energy dissipation were monitored and compared with the cast-in-place connection. The findings of this paper showed that the precast joints had good strength reserve, and the seismic performance in the later stage of loading even exceeds the cast-in-place joints. It was also found that the plastic hinge zone of the beam could be moved away from the column surface via reinforcement method. Additionally, based on the experiment, a detailed nonlinear finite element analysis (FEA) method was developed to reproduce the test response of specific types of bending moment-resistant precast concrete beam-column connections under a reversed loading test, which provided a theoretical reference for further research of the connections.

Numerical Investigations on the Seismic Behavior of a Reinforced Concrete Frame Structure

“…Reinforced concrete frame structures provide both the required ductility and the strength necessary to resist lateral loads such as those induced by earthquakes. However, proper design of beams, column and joints should be applied in order to ensure the safety of occupants and to limit the damage of the structure [5]. Numerical simulations have the advantage of being relatively simple to be applied from individual structural elements to complex, large-scale, structural systems.…”

Research on Nonlinear Behavior of Local High-Performance Concrete Beam–Column Connections

“…Therefore, the finite element model can be established using the results obtained from the test to further analyze the joints. Yu et al [29,30] and Sarma et al [31][32][33][34] simulated and analyzed the seismic capacity of prefabricated reinforced concrete frames in earthquakes with finite element software. The numerical method showed a high calculation accuracy.…”