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Comparison study on hysteretic energy dissipation and displacement components between cast‐in‐place and precast piers with high‐strength bars
Author(s) -
Zhuo WeiDing,
Liu Zhao,
Zhang JianDong,
Zhang WenMing
Publication year - 2018
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201700050
Subject(s) - precast concrete , pier , structural engineering , plastic hinge , dissipation , hinge , displacement (psychology) , engineering , ductility (earth science) , geotechnical engineering , materials science , composite material , psychology , creep , physics , psychotherapist , thermodynamics
Precast piers incorporated with high‐strength bars (≥500 MPa) have great potential to accelerate bridge construction and enhance seismic performance. Four large‐scale pier column specimens using high‐strength bars by cast‐in‐place (CIP) and precast construction were experimentally studied. The distinctions of damage pattern between CIP and precast piers were characterized by plastic hinge and toed hinge, which expounded the smaller damage in precast piers. In contrast with CIP piers, the energy dissipation of precast pier was reduced by approximately 50–60% after pier yielding. An appropriate reinforcement ratio was essential for CIP piers to maintain enough displacement ductility and prevent premature fracture of energy dissipation bars. In terms of displacement components, the plastic term of precast pier was much smaller than that of CIP pier, and the gap opening‐induced displacement predominates after pier yielding. The toed hinge was elaborated to disclose the displacement mechanism in precast piers. The experimental findings in this paper can provide additional input for seismic design of precast piers with high‐strength bars.