真空辅助钢管混凝土拱桥自振特性及地震响应分析*

doi:10.13385/j.cnki.vacuum.2025.04.15

Abstract

Abstract: The application effect of vacuum assisted technology in steel-concrete arch bridges was studied. Based on the construction parameters of a vacuum assisted steel-concrete arch bridge in a certain project, a comprehensive evaluation of the natural frequency, mode shape, and seismic response of the arch bridge was conducted using finite element analysis and experimental testing. The results show that the rise-span ratio and inclination angle of the arch bridge are positively correlated with the natural frequency. The amplification rates under the conditions of rise-span ratio of 1/5 and inclination angle of 14° are approximately 6.6% and 38.5%, respectively. Under the action of seismic waves, the response of arch bridges in the X direction is more obvious. In seismic design, more attention shall be paid to the seismic performance in the X direction. In the construction of vacuum assisted steel-concrete arch bridges, the rise-span ratio should be appropriately reduced and the inclination angle should be adjusted to optimize the structural stiffness of the arch bridge.

Key words: vacuum assisted, steel tube concrete arch bridge, natural vibration characteristics, earthquake response, finite element analysis

CLC Number: U448

CHEN Qiang, ZHANG Wei, DANG Tao, JIN Yangtao, CAO Xueping. Natural Vibration Characteristics and Seismic Response Analysis of Vacuum Assisted Steel-Concrete Arch Bridge[J].VACUUM, 2025, 62(4): 81-88.

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Natural Vibration Characteristics and Seismic Response Analysis of Vacuum Assisted Steel-Concrete Arch Bridge

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