Experimental Study of a New Precast Prestressed Concrete Joint

Abstract

Precast monolithic structures are increasingly applied in construction. Such a structure has a performance somewhere between that of a pure precast structure and that of a cast-in-place structure. A precast concrete frame structure is one of the most common prefabricated structural systems. The post-pouring joint is important for controlling the seismic performance of the entire precast monolithic frame structure. This paper investigated the joints of a precast prestressed concrete frame structure. A reversed cyclic loading test was carried out on two precast prestressed concrete beam–column joints that were fabricated with two different concrete strengths in the keyway area. This testing was also performed on a cast-in-place reinforced concrete joint for comparison. The phenomena such as joint crack development, yielding, and ultimate damage were observed, and the seismic performance of the proposed precast prestressed concrete joint was determined. The results showed that the precast prestressed concrete joint and the cast-in-place joint had a similar failure mode. The stiffness, bearing capacity, ductility, and energy dissipation were comparable. The hysteresis curves were full and showed that the joints had good energy dissipation. The presence of prestressing tendons limited the development of cracks in the precast beams. The concrete strength of the keyway area had little effect on the seismic performance of the precast prestressed concrete joints. The precast prestressed concrete joints had a seismic performance that was comparable to the equivalent monolithic system.

Seismic performance of prefabricated beam-to-column joint with replaceable energy-dissipating steel hinge

“…Prestressed steel strands can effectively provide a self-centering capacity for beam-column joints and improve the energy dissipation capacity, without serious structural damage [22][23][24][25][26][27][28][29][30][31]. Li et al [27] researched precast beam-to-column joint subjected to bidirectional lateral loading to assess precast RC frames under the action of an earthquake.…”

Shear Performance of Special Dry Joints for Precast Concrete Segments

“…In order to overcome this problem, a special dry joint for precast concrete connection is presented in this study. In addition, the previous works suggested that concrete compressive strength and fiber proportion affected the shear capacity of concrete joints [5,7,13,[18][19][20][21][22][23][24].…”

Dynamic and Probabilistic Seismic Performance Assessment of Precast Prestressed Rcfs Incorporating Slab Influence Through Three-Dimensional Spatial Model

“…As for the second type of dry-connection (i.e., prestressed unbonded type), Yan et al [19] experimentally analyzed a novel precast prestressed beam-column concrete connection by changing the concrete strength at the core regions, and the corresponding phenomena (e.g., damage development and capacity tendency) were captured during the cyclic loading. The results indicated that the prestressed tendons can limit the crack development in the precast components.…”