Abstract

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Title:: Fatigue Test of Full-scale Model of Tensile Anchor Plate in Cable-stayed Bridge

Author(s):: WANG Lian-hua; DING Bing-hao; LI Li-feng; College of Civil Engineering, Hunan University

Keywords:: cable-stayed bridge; tensile anchor plate; full scale test; fatigue property; fatigue load; mean stress

Abstract:: In order to study the fatigue property of specialshaped anchorage structure of a cable beam which connects steel girder of cable-stayed bridge with tensile anchor plate using butt welding, the fatigue test of full-scale model of tensile anchor plate was carried out. Through the finite element analysis of whole bridge, the model design of the fatigue test was determined. Several fatigue load calculation methods were comprehensively compared, and the fatigue load was determined. At the same time, considering the influence of mean stress on fatigue load, the upper and lower peak value of fatigue load were determined. The results show that after 3 million times of loading cycles, there was no fatigue crack on the weld parts of the full-scale model, and the stress values of fatigue test and those of finite element analysis matches well. The fatigue property of the special-shaped structure meets the engineering requirements.