Research on High Fatigue Stress Amplitude Cables for 400 MPa Bridges
As one of the key bearing structures of cable bridges,the mechanical properties of cables have strict requirements.In addition to the basic mechanical properties of cables,some important projects will put forward higher requirements for some indicators according to specific bridge projects.Fatigue performance is an important index considered by design institutes in cable design in recent years.In this paper,according to the requirements of Qilu Yellow River Bridge on cables,and in combination with the cable research experience of the"China Tianyan"project,the cable anchorage structure is optimized to study large specifications and high fatigue performance cables for bridges.The research results show that using epoxy steel strand,cold casting extrusion composite anchorage mode and optimized anchorage structure can ensure the anchor section size of the cable not too large,and at the same time ensure the large specification cable meet the requirements of 400 MPa fatigue stress amplitude.
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