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Effects of postcast connection locations on the seismic performance of precast concrete frame joints
Author(s) -
Feng Bo,
Xiong Feng,
Chen Jiang,
Chen Wen,
Zhang Yiping
Publication year - 2018
Publication title -
the structural design of tall and special buildings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 43
eISSN - 1541-7808
pISSN - 1541-7794
DOI - 10.1002/tal.1544
Subject(s) - precast concrete , structural engineering , hinge , dissipation , plastic hinge , joint (building) , beam (structure) , connection (principal bundle) , engineering , frame (networking) , core (optical fiber) , seismic analysis , finite element method , ductility (earth science) , materials science , mechanical engineering , composite material , creep , telecommunications , physics , thermodynamics
Summary For the precast structure with postcast connections, the location of the connection is usually the midspan of the beam, joint core, and beam end. However, the postcast connections located at the midspan of the beam or the joint core would increase the difficulty of construction because of the large dimension of the precast components or reinforcement congestion at joint core, respectively. A connection located at the beam end could decrease the seismic performance the energy dissipation mechanism being disturbed. To balance the requirements on the transportation, construction, and seismic performance, the connection is proposed to be located at one plastic hinge length from the beam end. A quasi‐static test was conducted on three 6 m × 3 m beam‐column joints, including two precast joints and a monolithic joint. The results show that the joint with connections located outside the plastic hinge zone had good seismic performance. When the connection located at the beam end, the ductility, strength, and energy dissipation reduced 8%, 10%, and 30%, respectively. To optimize the postcast location, finite element analysis was conducted and 2 h was suggested for the postcast location according to the analysis results.