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Computers and Concrete Volume 20, Number 6, December 2017 , pages 663-670 DOI: https://doi.org/10.12989/cac.2017.20.6.663 |
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Unified equivalent frame method for post-tensioned flat plate slab structures |
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Seung-Ho Choi, Deuck Hang Lee, Jae-Yuel Oh, Kang Su Kim, Jae-Yeon Lee and Kang Seok Lee
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| Abstract | ||
| The post-tensioned (PT) flat plate slab system is commonly used in practice, and this simple and fast construction method is also considered to be a very efficient method because it can provide excellent deflection and crack control performance under a service load condition and consequently can be advantageous when applying to long-span structures. However, a detailed design guideline for evaluating the lateral behavior of the PT flat plate slab system is not available in current design codes. Thus, typical design methods used for conventional reinforced concrete (RC) flat plate slab structures have inevitably been adopted in practice for the lateral load design of PT flat plate structures. In the authors\' previous studies, the unified equivalent frame method (UEFM) was proposed, which considers the combined effect of gravity and lateral loads for the lateral behavior analysis of RC flat plate slab structures. The aim of this study is to extend the concept of the UEFM to the lateral analysis of PT flat plate slab structures. In addition, the stiffness reduction factors of torsional members on interior and exterior equivalent frames were newly introduced considering the effect of post-tensioning. Test results of various PT flat plate slab-column connection specimens were collected from literature, and compared to the analysis results estimated by the extended UEFM. | ||
| Key Words | ||
| post-tension; flat plate; slab; lateral load; gravity load; equivalent frame; stiffness reduction | ||
| Address | ||
| Seung-Ho Choi and Kang Sun Kim: Department of Architectural Engineering, University of Seoul, 163 Siripdaero, Dongdaemun-gu, Seoul,02504, Korea Deuck Hang Lee: Department of Civil Engineering, Nazarbayev University, Kabanbay Batyr Ave 53, Astana 010000, Kazakhstan Jae-Yeon Lee: Division of Architecture, Mokwon University, 88 Doanbuk-ro, Seo-gu, Daejeon, 35349, Korea Kang Seok Lee: School of Architecture, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Korea | ||