Structural Design and Analysis of Large-span Steel Corridor in a Exhibition Center

This article focuses on the design analysis of a 38-meter large-span indoor corridor in a certain exhibition center in Guangzhou. Employing a steel box beam-concrete composite structural form, a finite element model of the structure is established using MIDAS GEN software. The overall stiffness, component stresses, and dynamic characteristics of the steel structure corridor are analyzed, and comparisons with domestic and international comfort standards are evaluated. The analysis results indicate that the maximum stress values of the steel structure components range from 121 MPa to 156 MPa, and the maximum compressive stress value of the concrete floor slab is 15.0 MPa, meeting the load-bearing requirements. The first-order lateral natural frequency is 5.9 Hz, indicating that lateral crowd load effects may be disregarded. The first-order vertical natural frequency is 1.8 Hz, which easily to generate pedestrian resonance effect. The peak vertical vibration acceleration under the most adverse conditions is 0.19 m/s². Combining comfort standards for different usage scenarios, the evaluation of peak acceleration under various conditions meets the requirements. Adding a Tuned Mass Damper (TMD) can effectively reduce the vertical vibration acceleration of the corridor by about 60% and improve its usage standards. The research results of this article can provide reference and guidance for the structural design of indoor large-span corridors.