| Title |
Flexural Capacity Evaluation of Prestressed Steel-Concrete Composite Beams with Discontinuous Webse |
| Authors |
Oh, Jae-Yuel ; Lee, Deuck-Hang ; Kim, Kang-Su ; Kang, Huyn ; Kim, Heung-Youl ; Kim, Hyung-Jun |
| Keywords |
Composite Beam ; Accordion Effect ; Prestress ; Corrugated Web ; Discontinuous Web |
| Abstract |
A corrugated steel plate has very little axial stiffness in longitudinal direction due to the accordion effect resulted from its geometric characteristics. Based on this phenomenon, the corrugated webbed steel beams can be utilized for prestressed members to get greater prestressing efficiency on the top and bottom flanges of steel beams that are the main resistant elements against the bending moment. Also, the resistance to any unbalanced construction loading can be improved and the composite action between concrete and steel web can be significantly enhanced by the corrugated web. Due to this reason, researches on the corrugated webbed steel beams have been continued so far. Manufacturing the corrugated webs, however, may have considerable disadvantageous in workability and economical point of view. In this study, therefore, the prestressed composite beam with discontinuous webs has been developed to improve such shortcomings of the corrugated webbed steel beam system. In order to verify the structural performance of the developed prestressed steel-concrete composite beam, its prestressing efficiency has been compared to the steel beams with corrugated webs by finite element analysis, and two full-scaled specimens were also fabricated and tested to evaluate their structural behavior. |