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Shear behavior and analytical model of T-type perfobond rib connectors

Zhan Yulin, Huang Wenfeng, Li Yanyan, Zhang Cheng, Shao Junhu, Tian Bo

Archives of Civil and Mechanical Engineering

2023

Vol. 23, no. 3

art. no. e150, 2023

The stress of shear connectors becomes more complicated with the increase of the span length of steel–concrete composite bridges. To ensure sufficient stiffness and ductility, a T-type perfobond rib (T-type PBL) shear connector is proposed. However, its mechanical behavior is not well understood due to the special shape and numerous influencing factors. Therefore, sixty-three finite element models were established based on the push-out test specimens with T-type PBL connectors to investigate the shear behavior and influencing parameters of ultimate bearing capacity. The effects of concrete end-bearing, perforated reinforcement, hole diameter, rib height, and flange width of T-type PBL on the shear-bearing capacity were performed and discussed based on the numerical results. The results showed that the bearing capacity provided by the concrete end-bearing and the perforated reinforcements was about 16% and 10% of the ultimate load. Additionally, the ductility of the specimen could be improved by the perforated reinforcements. It was showed that the shear-bearing capacity increased nonlinearly with the growth of the hole diameter. When the height of rib increased from 80 to 120 mm, the shear-bearing capacity was improved by 12% on average. The impact of flange width on the shear-bearing capacity was insignificant, which was less than 1.5%. Based on the results of parametric analysis. An analytical model for shear-bearing capacity of the T-type perfobond rib shear connector was established, and the validity was verified by relative test results. A basis for the evaluation of shear-bearing capacity, and application of the T-type PBL connectors was provided in this paper.

Strefa nad filarem ciągłych ustrojów mostów zespolonych stal-beton – przegląd patentów

Karaś Sławomir, Kamińska Izabela

Drogownictwo

2022

nr 4

100--113

Celem artykułu jest prezentacja patentów z zakresu projektowania strefy nad filarem ustrojów nośnych zespolonych stal-beton. Została wykorzystana przeglądarka Espasnet, która umożliwia dostęp do ponad 90 milionów dokumentów patentowych. Po wpisaniu zakresu tematycznego procedura wybrała 537 tytułów patentów, z których wyselekcjonowano 22 dokumenty zamieszczone w artykule. Rozwiązania patentowe są różnorodne, nie ma dominującej grupy technologii. Większość patentów pochodzi z Chin. W większości są to rozwiązania, które zastosowano podczas budowy mostów. Odnaleziono dwa patenty polskie.

The purpose of this paper is to present patents in the field of hogging bending zone design in steel-concrete composite bridges. The Espasnet browser, which provides access to over 90 million patent documents, was used. After entering the subject area, the procedure selected 537 patent titles, from which the 22 documents presented in this paper were selected. The patent solutions are diverse and there is no dominant technology among them. Most of the patents are from China, and majority of them are solutions used in bridge construction. Two Polish patents were found.