EXPERIMENTAL STUDY AND IN-DEPTH TENSILE MECHANISM ANALYSIS OF GROUTED SLEEVE LAPPING CONECTORS

Qiong Yu; Liang Zhang; Peiyan Tang; Ling-zhi Li; Xingkui  Zhang; Baoxiu Fan; Zhi  Zhang; Zhenhai  Chen

doi:10.1590/1679-78256935

EXPERIMENTAL STUDY AND IN-DEPTH TENSILE MECHANISM ANALYSIS OF GROUTED SLEEVE LAPPING CONECTORS

Authors

Qiong Yu Department of Disaster Mitigation for Structures, Tongji University, Shanghai 200092 https://orcid.org/0000-0002-5259-5793
Liang Zhang a Department of Disaster Mitigation for Structures, Tongji University, Shanghai 200092, China https://orcid.org/0000-0001-9665-5148
Peiyan Tang Department of Disaster Mitigation for Structures, Tongji University, Shanghai 200092 https://orcid.org/0000-0002-0894-2866
Ling-zhi Li Department of Disaster Mitigation for Structures, Tongji University, Shanghai 200092 https://orcid.org/0000-0002-9477-6824
Xingkui Zhang Shanxi Construction Engineering Group Co., Ltd., Shanxi 030006 https://orcid.org/0000-0002-1534-6042
Baoxiu Fan Shanxi Construction Engineering Group Co., Ltd., Shanxi 030006 https://orcid.org/0000-0003-1246-7305
Zhi Zhang Shanxi Erjian Group Co., Ltd., Taiyuan 030013, Shanxi https://orcid.org/0000-0002-4762-9557
Zhenhai Chen Shanxi Erjian Group Co., Ltd., Taiyuan 030013, Shanxi https://orcid.org/0000-0003-3826-5787

DOI:

https://doi.org/10.1590/1679-78256935

Abstract

To study the failure modes, bearing capacity, ductility, and sleeve strain of grouted sleeve lapping connectors, 36 specimens were tested under uniaxial tensile load. The test results show that the sleeves are under longitudinal tension at the beginning, which changes to longitudinal compression in the late stage of loading, and the changing load increases gradually with the lap length. The force transmission path and mechanical mechanism of the connectors are analyzed. The distribution and development process of longitudinal sleeve stress is analyzed based on the constitutive model stress, and it is found that the sleeve changes from longitudinal tension to longitudinal compression at the late loading stage, which is consistent with the test results. Based on the test, the calculation formulas of the ultimate bond strength and critical lap length of the routed sleeve lapping connector are proposed. The research results lay a theoretical foundation for the application of grouted sleeve lapping connectors.

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Published

2022-01-17

Issue

Vol. 19 No. 2 (2022)

Section

Articles

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