EXPERIMENTAL RESEARCH ON MECHANIC PROPERTIES OF PREFABRICATED REINFORCED CONCRETE BEAMS WITH H-SHAPED STEEL JOINTS

HU Dazhu; YANG Zhenqiao; ZHU Qichang; WU Zhiping; ZHAO Juan

doi:10.13204/j.gyjzG20042108

Volume 51 Issue 6

Oct. 2021

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Citation:

HU Dazhu, YANG Zhenqiao, ZHU Qichang, WU Zhiping, ZHAO Juan. EXPERIMENTAL RESEARCH ON MECHANIC PROPERTIES OF PREFABRICATED REINFORCED CONCRETE BEAMS WITH H-SHAPED STEEL JOINTS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(6): 59-66,23. doi: 10.13204/j.gyjzG20042108

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EXPERIMENTAL RESEARCH ON MECHANIC PROPERTIES OF PREFABRICATED REINFORCED CONCRETE BEAMS WITH H-SHAPED STEEL JOINTS

doi: 10.13204/j.gyjzG20042108

1. College of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, China;
2. Shanghai Pudong New Area Construction (Group) Co., Ltd., Shanghai 200125, China

Received Date: 2020-04-21
Available Online: 2021-10-27

Abstract

Abstract

In order to simplify the connection complexity of precast concrete members and reduce the construction difficulty, a precast concrete beam with H-shaped steel joints on both ends was proposed. The ends of the H-shaped steel of the prefabricated concrete beam was conneted with an end plate, which was connected with the beam ends by anchors, and the longitudinal reinforcement in the concrete beam section was connected with the end plate by perforated plug welding. Four test specimens were designed. The bearing capacity, deformation form and failure mode under concentrated load were experimentally studied, the method for calculating the deflection was proposed. The mechanical properties at the interface between the profile steel with different anchor types and the concrete were studied. The test results showed that when the section was the same, the deformation of the member connected only with webs was greater than that of the member connected with flanges and webs. When the mid-span deformation of the precast reinforced concrete beam of the H-shaped steel joint reached 1/50, the bearing capacity of the precast beam did not decrease, and no significant slip occurred at the junction of the steel and concrete. The flexural performance of the members could meet the requirements of Code for Design of Concrete Structures (GB 50010-2010).
- precast concrete beam,
- prefabricated,
- steel joint,
- bending resistance,
- slip

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References(19)

References

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