Lap splice length of U-shaped rebar loop in precast concrete structure

CHEN Yihu; LU Pengyuan; ZHANG Min; LU Dan; LIU Fengshou; QIN Wen

doi:10.11835/j.issn.2096-6717.2021.129

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Lap splice length of U-shaped rebar loop in precast concrete structure

Civil Engineering | 更新时间：2023-03-07

- Lap splice length of U-shaped rebar loop in precast concrete structure
- Journal of Civil and Environmental Engineering Vol. 45, Issue 2, Pages: 131-140(2023)
- 作者机构：
  
  1.桂林理工大学，广西桂林 541000
  2.贺州学院，广西贺州 542800
  3.华东建筑设计研究有限公司，上海 200001
  4.贺州通号装配式建筑有限公司，广西贺州 542800
  5.中建五局山东公司，济南 250000
- 作者简介：
  
  CHEN Yihu (1979- ), PhD, professor, main research interest: prefabricated concrete structure, E-mail: yihu.chen@outlook.com.
  ZHANG Min （corresponding author）， PhD， professor， E-mail： emailzm@126.com.
- 基金信息：
  
  National Key Research and Development Program of China(2016YFC0701902-4);Natural Science Foundation of Guangxi(2018GXNSFAA050145);New Drive Development Project of Hezhou(贺科创ZX1907002;PT1907009)
- DOI：10.11835/j.issn.2096-6717.2021.129
  CLC： TU375.4
- Received：21 February 2021，
  
  Published：25 April 2023
- 稿件说明：
移动端阅览
CHEN Yihu, LU Pengyuan, ZHANG Min, et al. Lap splice length of U-shaped rebar loop in precast concrete structure[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 131-140.
DOI：

CHEN Yihu, LU Pengyuan, ZHANG Min, et al. Lap splice length of U-shaped rebar loop in precast concrete structure[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 131-140. DOI： 10.11835/j.issn.2096-6717.2021.129.

摘要

为研究装配式混凝土U型钢筋环扣连接的搭接长度，制作了1个现浇梁柱节点试件和3个不同搭接长度的U型钢筋环扣连接节点对比试件，进行低周反复拟静力试验，观察各试件的破坏模式，研究其滞回性能、承载力、变形能力及钢筋的应力发展过程，分析装配式混凝土U型钢筋环扣连接的合理搭接长度。结果表明：装配式节点试件承载力高于现浇节点试件；不同搭接长度试件的延性及耗能能力有所不同，搭接长度的增长有利于试件承载力、延性和耗能能力等抗震性能的提升；基于试验结果，拟合回归了U型钢筋环扣连接的合理搭接长度，对装配式混凝土U型钢筋环扣连接节点的优化设计提出了建议。

Abstract

To study the lap splice length of U-shaped rebar loop in precast concrete structure

three fabricated specimens with different lap splice length and one cast-in-place beam-column joint comparison specimen were carried out for low-cycle repeated quasi-static tests. By observing the failure modes of each specimen

the corresponding hysteretic behavior

bearing capacity

deformation capacity

and the stress development process of reinforcement were studied

and then the reasonable lap splice length of U-shaped rebar loop in precast concrete structure was analyzed. The results show

(1) the bearing capacity of fabricated joints is higher than that of cast-in-place joints; (2) the ductility and energy dissipation capacity of specimens with different lap splice length are different; (3) the increase of lap splice length is conducive to the improvement of the bearing capacity

ductility

and energy dissipation capacity of specimens. Finally

based on the test results

the reasonable lap splice length of U-shaped rebar loop is fitted and regressed

and then the suggestions for the optimal design of the joint of the lap splice length of U-shaped rebar loop in precast concrete structure are putting forward.

关键词

Keywords

references

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