Experimental analysis reveals connector types significantly affect load-bearing capacity and stiffness in pipe-roof structures.
The pipe‐roof preconstruction (PRP) structure can be characterized as a variable‐section double‐steel plate concrete system. This study investigates the influence of connector types and configurations on the eccentric compression behavior of such structures through five eccentric compression tests: a prototype specimen, a stud specimen, and three specimens with different connection types. The failure modes, load‐deflection curves, and ultimate load‐bearing capacities were analyzed. A numerical model was developed to evaluate the effect of connector diameters on the ultimate load‐bearing capacity. An equivalent thickness equation of steel plates in the eccentric bearing capacity calculation of PRP structures was proposed, addressing limitations in existing design methods. The results demonstrate that stud connectors enhance the stress participation of steel plates and improve the ultimate load‐bearing capacity and stiffness of eccentric members, albeit to a limited extent. Tie bar connectors or studs welded to the main bar significantly increase the ultimate load‐bearing capacity and stiffness of eccentric compression specimens, with similar enhancement effects observed across different connector types. Connector diameter notably influences ultimate bearing capacity. Given the growing application of the PRP method in urban underground engineering, this study provides a scientific basis for its design and construction.
No takes yet. Share an insight, caveat, or question.
Song et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: