Design and Key Construction Technology of Steel-Concrete-Steel Sandwich Composite Pylon for a Large Span Cable-stayed Bridge

Abstract

Steel-concrete composite pylons are rarely used in long-span cable supported bridges. This paper introduces a new type of steel-concrete composite pylon, which is applied to a cable-stayed bridge with a main span of 600m. For this new type of pylon, the steel shells are connected with concrete through PBL shear connectors and studs, and the inner steel shells are connected with the outer steel shells by angle steels. Numerical analysis and full-scale model tests show that the pylon structure exhibits excellent mechanical properties and construction performance. On the other hand, highly factory-manufactured modular assembly of the reinforced steel shell structure can effectively reduce the intensity and difficulty of on-site operations, and improve the quality of the project, with low construction risks. Whereas, the modernization level of the construction of the cable pylon has been greatly improved.

Self‐Powered Intelligent Damper Integrated Triboelectric‐Electromagnetic Hybrid Unit for Vibration In Situ Monitoring of Stay Cables

“…Cable-stayed bridges have been increasingly used in engineering practice due to its beautiful appearance, convenient construction, and large span capacity. [1,2] However, owing to the weak damping and high flexibility of the cable itself, it faces many vibration problems, such as wind and rain excited vibration and vortex vibration. [3] This may cause fatigue damage to the cable and the connection between the cable and bridge body, reducing the service life.…”