Noh J.H.,GS construction and engineering |
Cho J.Y.,GS construction and engineering |
Kim J.J.,Sejong University |
Kim C.S.,DM Engineering
Bridge Maintenance, Safety, Management and Life Extension - Proceedings of the 7th International Conference of Bridge Maintenance, Safety and Management, IABMAS 2014 | Year: 2014
This paper introduces the development of a partially earth anchored (PEA) system which can be applied to a multiple span cable stayed bridge (CSB). A characteristic analysis on existing multiple span CSBs was conducted to validate the adaptability of PEA system. The analysis showed that PEA system can improve the structural safety and economic feasibility of multiple span CSB. The PEA-CSB can restrain axial compressive load acting on a tower and reduce the global buckling length of a stiffened girder. Therefore, axial members can be effectively utilized and steel quantity required for a steel deck can be decreased to save construction cost. The PEA system was verified for its application on the composite section of a multiple span CSB. The CSB is a four-tower multi-span bridge which has a main span length of 500 m. As high tensile stress was generated at the top of the bridge decks at the mid-span between two main columns, a hybrid system for enhancing the bridge deck sections was proposed. While the composite sections made of concrete and steel were used near to the main columns, steel sections were used at the mid-span between two main columns. © 2014 Taylor & Francis Group.