Unified equivalent frame method for post-tensioned flat plate slab structures

Seung Ho Choi, Deuck Hang Lee, Jae Yuel Oh, Kang Su Kim, Jae Yeon Lee, Kang Seok Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Pages (from-to)663-670
Number of pages8
JournalComputers and Concrete
Issue number6
Publication statusPublished - Dec 1 2017


  • Equivalent frame
  • Flat plate
  • Gravity load
  • Lateral load
  • Post-tension
  • Slab
  • Stiffness reduction

ASJC Scopus subject areas

  • Computational Mechanics

Fingerprint Dive into the research topics of 'Unified equivalent frame method for post-tensioned flat plate slab structures'. Together they form a unique fingerprint.

Cite this