Experimental and Numerical Research on Uplift-Restricted and Slip-Permitted Screw-Shaped Connectors

Chen, Yuxuan; Yan, Quansheng; Yu, Xiaolin; Jia, Buyu; Wu, Yu-Fei; Luo, Yibin

doi:10.1007/s13296-021-00569-9

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…The new shear members are named the uplift-restricted and slip-permitted T-shape connectors (URSP-T connector) ( Figure 1 b) and applied to the negative moment zone of a real continuous composite girder bridge. Due to the complex structure of URSP-T connector, some studies have proposed a more simplified structure, such as URSP screw-shaped connectors, which are more adaptable to the requirements of rapid construction than URSP T-shaped connectors ( Figure 1 c) [ 27 ]. The application of the URSP connector was also studied to be used in steel–concrete composite frame buildings successfully, which has covered a research blank in this field [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Experiment Analysis on Crack Resistance in Negative Moment Zone of Steel–Concrete Composite Continuous Girder Improved by Interfacial Slip

Dai²,

Chen

et al. 2022

Materials

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Due to the strong interface effect of continuous steel–concrete composite beams with conventional shear connectors, the efficiency of applying pre-stress in the negative moment zone is greatly reduced, which leads to a difficulty of anti-cracking design in the negative moment zone of pre-stressed steel–concrete composite box girder. In order to study the feasibility and the working mechanism of improving the crack resistance of continuous steel–concrete composite bridges by releasing the interfacial slip effect within the negative bending moment region, two groups of model tests were carried out in the paper. Two steel–concrete composite beams were used for model test, one of them using the conventional stud shear connectors, another one using the new shear connectors, named uplift-restricted and slip-permitted shear connectors. The results show that, compared with the composite beam with conventional shear studs, the composite beams with uplift-restricted and slip-permitted shear connectors have a higher pre-stress application efficiency, and the new connector could release the interface slip, which can make the tensile stress distribution in concrete slab more uniform within the negative moment zone, thus increasing the cracking load of concrete slab and reducing the subsequent crack width effectively. This study is helpful to understand the relationship between the interface slip and the anti-crack characteristics in negative moment zones, and a new anti-crack design method is proposed for the design of continuous composite girder.

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Section: Introductionmentioning

confidence: 99%

Experiment Analysis on Crack Resistance in Negative Moment Zone of Steel–Concrete Composite Continuous Girder Improved by Interfacial Slip

Dai²,

Chen

et al. 2022

Materials

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“…The longitudinal shear resistance of the interface between the steel beam and concrete slab is released due to the low elastic modulus material (foamed plastic); thus, the cracking resistance of the composite structure is improved [ 28 ]. The theoretical mechanism of partially releasing the composite effect of the steel–concrete composite beams by applying URSP connectors was explored [ 29 ], theoretical models of the uplift and slip performance of URSP connectors were studied [ 30 , 31 ], steel–concrete composite beams with URSP connectors were experimentally studied [ 32 ], and curved composite beams with URSP connectors were experimentally and numerically studied [ 33 ]. Except for composite beams, investigations of the application of the new type of connector have also included components of composite bridges [ 34 , 35 ], sub-assemblages, and connections of the composite frames of building engineering [ 36 , 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Seismic Response Analysis of Steel–Concrete Composite Frame Structures with URSP Connectors

Duan

Nie

et al. 2022

Materials

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The uplift-restricted and slip-permitted (URSP) connector is a new type of connector used in steel–concrete composite structures that has been proven to improve the structural performance of negative moment regions. Since this connector changes the interface restraint between the slab and steel beam, there is an imperative to study the seismic performance of steel–concrete composite frame systems with this new type of connector. In this study, the dynamic behavior of composite frame structures with URSP connectors under seismic loads was numerically investigated. First, a beam–shell mixed model was used and complex interfaces of different connectors were considered while establishing a numerical model to conduct elasto–plastic time history analysis under various seismic loads. This numerical model was validated with the frame sub-assemblage experimental results of quasi-static cyclic tests. Second, the model analysis results of structures with URSP connectors were obtained and compared with those of traditional structures. Third, dynamic response results including roof displacement, inter-story displacement, and the distribution and failure modes of plastic hinges were analyzed and compared. The comparisons indicated that the arrangement of full-span URSP connectors had a non-negligible influence on the dynamic behavior of the systems. The arrangement increased the maximum inter-story displacement by 31.5% and induced adverse effects in certain cases, which is not suggested in the application of URSP connectors. The partial arrangement of URSP connectors had little influence on the dynamic behavior of the systems, and the frame systems still showed a good seismic performance, which was the same as the traditional composite structural system. These findings may promote the application of URSP connectors in composite structures.

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Development of a novel crack-resistance technique for concrete slab in the hogging moment region of continuous composite beam

Zhuang,

Wu,

Wang

et al. 2025

Engineering Structures

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Experimental and Numerical Research on Uplift-Restricted and Slip-Permitted Screw-Shaped Connectors

Cited by 5 publications

References 17 publications

Experiment Analysis on Crack Resistance in Negative Moment Zone of Steel–Concrete Composite Continuous Girder Improved by Interfacial Slip

Experiment Analysis on Crack Resistance in Negative Moment Zone of Steel–Concrete Composite Continuous Girder Improved by Interfacial Slip

Seismic Response Analysis of Steel–Concrete Composite Frame Structures with URSP Connectors

Development of a novel crack-resistance technique for concrete slab in the hogging moment region of continuous composite beam

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