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Abstract:
Substantial attention has been paid to precast structures due to their obvious advantages. While precast members connected by grouted sleeves are used in seismic regions, studies on the seismic performance of precast column under large axial compression ratio are few, especially in underground structures. In this paper, three full-scale precast columns were designed and tested under axial compression ratios of 0.2, 0.5, and 0.85. Additionally, three monolithic cast-in-place columns with identical details served as a control. The main objectives of this study are to study the influence of the axial compression ratio on the global mechanical behavior of precast columns subjected to low-cyclic reversed horizontal loads, and to discover the internal force distribution and reach the appropriate axial compression ratio for precast columns. The test results are: (1) Precast columns were capable of matching the deformation and lateral strength of monolithic connections under the same compression ratio, while they were affected significantly by the axial compression ratio. (2) The plastic hinge location of precast columns shifted above the grouted sleeve region. It is found that good ductility can be exhibited compared with conventional cast-in-place column. (3) An effective measure to relieve uncoordinated stiffness along the height of the column was introduced. (4) Based on strength and deformation with the same axial compression ratio, the appropriate axial compression ratio was achieved for precast columns and the relationship of spliced-bar strain ratio and axial compression ratio was presented.
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Source :
JOURNAL OF STRUCTURAL ENGINEERING
ISSN: 0733-9445
Year: 2021
Issue: 12
Volume: 147
4 . 1 0 0
JCR@2022
ESI Discipline: ENGINEERING;
ESI HC Threshold:87
JCR Journal Grade:2
Cited Count:
WoS CC Cited Count: 16
SCOPUS Cited Count: 16
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
Affiliated Colleges: