Study on Seismic Performance of Precast Segmental Piers with Large-Diameter Grouted Sleeve Connections

被引：0
|
作者：
Wang, Jinfeng [1 ]
Wang, Yutong [1 ]
Xiang, Huawei [2 ,3 ]
Chen, Chunlei [1 ]
Xu, Rongqiao [1 ]
机构：
[1] College of Civil & Architectural Engineering, Zhejiang University, Hangzhou
[2] China Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing
[3] Inspection and Certification Co., Ltd., MCC, Beijing
来源：
Bridge Construction | 2024年 / 54卷 / 03期
基金：
中国国家自然科学基金;
关键词：
finite element method; large-diameter grouted sleeve; mechanical property; precast scgmental pier; quasi-static test; seismic Performance;
D O I：
10.20051/j.issn.1003-4722.2024.03.006
中图分类号：
学科分类号：
摘要：
Quasi-static tests and numerical Simulation were carried to study the seismic Performance of the precast segmental piers with largc-diameter grouted sleeve connections. Two precast segmcntal piers with large-diameter sleeve connections(with main reinforced bars of 40 mm diameter)and one cast-in-place (CIP) picr were fabricated for the quasi-static tests, and the test findings, failure modes, hysteresis curvcs as well as the load bcaring capacitics of the two typcs of spccimcns were compared. The load bcaring behaviors of concrete, sleeve and connection reinforced bars of the precast segmental piers were numerically simulated. The test rcsults demonstrate that under horizontal cyclic loading, both the precast and CIP piers experienced flexure-shear failure, but with different failure modes in the pier bottom, especially large arca crush of concrete at the foot of the CIP pier, while an even more severe damage in the precast pier—crush and spalling of large pieces of concrete circling the sleeve. Compared with the CIP pier, the average load bearing capacity and displacement duetility coefficient of the precast picr arc 5. 2% and 2. 7%, respectively, but the mechanical property of the precast picr is as good as the CIP picr. The numerical Simulation indicates that there are plastic zones on the top of the sleeve and in the bottom of the precast pier, with axial forccs playing a dominant role, which should be given great concern in the sleeve dcsign. The main rcinforccd bars and grout remain in rcliable bonding State, indicating the precast scgmental pier with large-diameter grouted sleeve exhibits sound seismic Performance. © 2024 Wuhan Bridge Media Co., Ltd., MBEC. All rights reserved.
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页码：39 / 45
页数：6
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