Safety analysis of reinforcement and renovation of suspension bridge floor system arch bridge
ZHANG Yunqing
WU Junpeng
ZHAO Qingyun
LIU Kang
Abstract：To improve the stress state of the suspension bridge floor system,which mainly experiences forces on the crossbeam,a reinforcement modification plan has been proposed that involves replacing the hangers and adding steel pipe truss longitudinal beams.Taking a tied arch bridge as the background,the dynamic performance of the reinforced arch bridge structure is analyzed under the combination of permanent load,live load,and temperature load.The results indicate that the failure of a hanger has a significant impact on the internal forces of adjacent hangers on the same side,meeting the requirement of Technical Code for Concrete-filled Steel Tube Arch Bridges:GB 50923-2013 for a safety factor of three;the farther the distance from the broken hanger,the lesser the impact on the internal forces of the remaining hangers,while the effect on hangers on the opposite side of the broken hanger is relatively small;the failure of a hanger noticeably affects the displacement of the tie beam;the key parts of the steel pipe truss after the hanger failure are subjected to force verification,and the results meet the requirements of the Standard for Design of Steel Structures:GB 50017-2017.This reinforcement modification plan ensures the safety of the remaining structure after a hanger failure.
Keywords：bridge engineeringarch bridgesuspension bridge floor systemreinforcement and renovationfinite element analysishanger rod fracture
Publication Date：2025-07-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 84-90 )