This review examines structural performance and dynamic response of fish-bellied steel purlins, suggesting improvements in design methods.
As the key force transmission component of deep foundation pit support system, fish-bellied steel purlin is widely used in the field of civil engineering due to its advantages of light weight, high strength, convenient construction and reusability. This paper systematically reviews the research progress of fish-bellied steel purlins in structural static performance ( bearing capacity, stability ), joint mechanical behavior, dynamic response characteristics, construction process simulation and design methods. The analysis shows that the current research focuses on numerical simulation and scale test, and the research on complex boundary conditions, initial defect sensitivity, real node performance and life-cycle periodic performance is still insufficient. Future research should focus on high-precision numerical model construction, large-scale node test verification, intelligent monitoring technology integration and standardized design guidelines to promote the safe and efficient application of the structural system.
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Gao et al. (2025) studied this question.
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