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

doi:10.11835/j.issn.2096-6717.2021.129

Home > Archive>Volume 45, Issue 2, 2023 >131-140. DOI:10.11835/j.issn.2096-6717.2021.129

Lap splice length of U-shaped rebar loop in precast concrete structure
DOI:
                        10.11835/j.issn.2096-6717.2021.129
                    
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Author:
                        CHEN Yihu1,2CHEN Yihu
Guilin University of Technology, Guilin 541000, Guangxi, P. R. China;Hezhou University, Hezhou 542800, Guangxi, P. R. China
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LU Pengyuan1LU Pengyuan
Guilin University of Technology, Guilin 541000, Guangxi, P. R. China
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ZHANG Min1ZHANG Min
Guilin University of Technology, Guilin 541000, Guangxi, P. R. China
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LU Dan3LU Dan
East China Architectural Design & Research Institute Co., Ltd, Shanghai 200041, P. R. China
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LIU Fengshou4LIU Fengshou
Hezhou Tonghao Prefabricated Construction Co., Ltd., Hezhou 542800, Guangxi, P. R. China
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QIN Wen1,5QIN Wen
Guilin University of Technology, Guilin 541000, Guangxi, P. R. China;China Construction Fifth Engineering Bureau Co., Ltd. Shandong Branch, Jinan 250000, P. R. China
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Affiliation:1.Guilin University of Technology, Guilin 541000, Guangxi, P. R. China;2.Hezhou University, Hezhou 542800, Guangxi, P. R. China;3.East China Architectural Design & Research Institute Co., Ltd, Shanghai 200041, P. R. China;4.Hezhou Tonghao Prefabricated Construction Co., Ltd., Hezhou 542800, Guangxi, P. R. China;5.China Construction Fifth Engineering Bureau Co., Ltd. Shandong Branch, Jinan 250000, P. R. China
Clc Number:TU375.4
Fund Project:National Key Research and Development Program of China (No. 2016YFC0701902-4); Natural Science Foundation of Guangxi (No. 2018GXNSFAA050145); New Drive Development Project of Hezhou (No. ZX1907002, PT1907009)

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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.

Key words:prefabricated structure;concrete structure;U-shaped rebar loop;quasi-static test;lap splice length

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陈宜虎,陆鹏远,张敏,卢旦,刘丰收,秦稳.装配式混凝土U型钢筋环扣的连接长度[J].土木与环境工程学报（中英文）,2023,45(2):131~140

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Received:February 21,2021
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Online: March 20,2023
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