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A platform for research: civil engineering, architecture and urbanism
Shear behavior of a novel bearing-shear connector for prefabricated concrete decks
Highlights A novel B-S connector with a compact structure and ideal elastic-plastic load-slip curve is proposed. The static push-out tests of B-S connectors with different shapes and sizes under monotonic and cyclic loads are conducted. The failure modes and bearing mechanisms of B-S connectors are studied. A method for calculating the shear capacity of B-S connectors is proposed.
Abstract Grouped studs are typically used in composite bridges built with prefabricated concrete decks. However, the dense distribution of the grouped studs in areas of high shear makes the prefabrication and placement of a concrete deck difficult, and the small walking space on the top flanges raises safety concerns for construction workers. To further simplify the construction details of composite bridges made of prefabricated concrete decks, this study proposed a novel bearing-shear (B-S) connector with a compact structure and an ideal elastic–plastic load-slip curve. To verify the mechanical properties of the B-S connectors, five groups of fifteen push-out specimens were introduced. The test results indicated that: the shear capacity of a single B-S connector exceeds 1180 kN, which is close to nine studs with a diameter of 19 mm, and the required area of reserved holes in prefabricated decks is approximately 1/3 of that required for grouped studs with the same shear capacity. The B-S connectors exhibited high shear stiffness and almost no cracks in the elastic stage. Finite element analysis results showed that the stress concentration of the B-S connector was less than that of grouped studs in the elastic stage. The ultimate slip S 0.9 varied between 17.2 mm and 35 mm, which is larger than the 6 mm requirement for plastic design in Eurocode 4. Finally, the shear capacity of the B-S connector was predicted fairly well by the proposed formulae.
Shear behavior of a novel bearing-shear connector for prefabricated concrete decks
Highlights A novel B-S connector with a compact structure and ideal elastic-plastic load-slip curve is proposed. The static push-out tests of B-S connectors with different shapes and sizes under monotonic and cyclic loads are conducted. The failure modes and bearing mechanisms of B-S connectors are studied. A method for calculating the shear capacity of B-S connectors is proposed.
Abstract Grouped studs are typically used in composite bridges built with prefabricated concrete decks. However, the dense distribution of the grouped studs in areas of high shear makes the prefabrication and placement of a concrete deck difficult, and the small walking space on the top flanges raises safety concerns for construction workers. To further simplify the construction details of composite bridges made of prefabricated concrete decks, this study proposed a novel bearing-shear (B-S) connector with a compact structure and an ideal elastic–plastic load-slip curve. To verify the mechanical properties of the B-S connectors, five groups of fifteen push-out specimens were introduced. The test results indicated that: the shear capacity of a single B-S connector exceeds 1180 kN, which is close to nine studs with a diameter of 19 mm, and the required area of reserved holes in prefabricated decks is approximately 1/3 of that required for grouped studs with the same shear capacity. The B-S connectors exhibited high shear stiffness and almost no cracks in the elastic stage. Finite element analysis results showed that the stress concentration of the B-S connector was less than that of grouped studs in the elastic stage. The ultimate slip S 0.9 varied between 17.2 mm and 35 mm, which is larger than the 6 mm requirement for plastic design in Eurocode 4. Finally, the shear capacity of the B-S connector was predicted fairly well by the proposed formulae.
Shear behavior of a novel bearing-shear connector for prefabricated concrete decks
Zou, Yang (author) / Qin, Fengjiang (author) / Zhou, Jianting (author) / Zheng, Zhichao (author) / Huang, Zulin (author) / Zhang, Zhongya (author)
2020-09-23
Article (Journal)
Electronic Resource
English
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