Numerical Study on Shear Performance of Grouped Large Headed Stud Connectors in Prefabricated Steel-Thin UHPC Composite Girder

CHEN Yang; NING Jian; REN Chong; YANG Yong

doi:10.13204/j.gyjzG23070905

Volume 53 Issue 12

Dec. 2023

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CHEN Yang, NING Jian, REN Chong, YANG Yong. Numerical Study on Shear Performance of Grouped Large Headed Stud Connectors in Prefabricated Steel-Thin UHPC Composite Girder[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(12): 164-174. doi: 10.13204/j.gyjzG23070905

Citation:

CHEN Yang, NING Jian, REN Chong, YANG Yong. Numerical Study on Shear Performance of Grouped Large Headed Stud Connectors in Prefabricated Steel-Thin UHPC Composite Girder[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(12): 164-174. doi: 10.13204/j.gyjzG23070905

Citation:

CHEN Yang, NING Jian, REN Chong, YANG Yong. Numerical Study on Shear Performance of Grouped Large Headed Stud Connectors in Prefabricated Steel-Thin UHPC Composite Girder[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(12): 164-174. doi: 10.13204/j.gyjzG23070905

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Numerical Study on Shear Performance of Grouped Large Headed Stud Connectors in Prefabricated Steel-Thin UHPC Composite Girder

doi: 10.13204/j.gyjzG23070905

1. School of Mechanics and Engineering Sciences, Shanghai University, Shanghai 200444, China;
2. State Key Laboratory of Green Building, Xi'an University of Architecture & Technology, Xi'an 710055, China

Received Date: 2023-07-09
Available Online: 2024-02-28

Abstract

Abstract

In order to study the shear performance of grouped large headed stud connectors in prefabricated steel-thin UHPC composite girder, 19 push-out specimens were established by finite element software ABAQUS to study the influence of casting method, stud spacing, key group spacing, and key group number on the shear bearing capacity, shear stiffness, and load-slip curve of the specimens. The results showed that the failure mode of specimens was mainly the shear failure at the root of studs and the local crushing of concrete slabs. The shear bearing capacity of prefabricated specimens was reduced by 10% compared with the cast-in-place specimens. The shear bearing capacity of the specimens decreased significantly when the spacing of studs was less than 2.5 times the diameter of studs. The shear bearing capacity and shear stiffness of individual stud in the key group were reduced by the increase of the spacing and number of key groups. The theoretical model for predicting the load-slip relation of the prefabricated steel-thin UHPC grouped large headed stud connectors was proposed. Moreover, the results of the shear capacity from ABAQUS were compared with the calculated results from the code, and a design method for prefabricated steel-thin UHPC composite girder bridge grouped large headed stud connectors was obtained.
- prefabricated structure,
- grouped large headed stud connectors,
- thin UHPC slab,
- shear performance,
- finite element

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References(26)

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