- Author
- Gross, J. L.
- Title
- Implementation of Compressible Shoring Analysis for Multistory Concrete Construction.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Report
- NBSIR 84-2964, December 1984, 59 p.
- Distribution
- Available from National Technical Information Service
- Keywords
- concretes | concrete construction | shoring | computer models | reinforced concretes | formwork | safety | structural analysis
- Abstract
- The report presents an analytical procedure for determining the loads on the shoring system and supporting slabs in multistory cast-in-place concrete construction. The procedure assumes that the slabs are supported by evenly distributed compressible shores and reshores and employs the stiffness method of analysis to solve for the loads on the shoring system and slabs as construction advances. The number of shores and reshores; shore, reshore and base support stiffnesses; casting rate; and concrete strength gaining characteristics are considered in the analysis. Details of the implementation of the shoring analysis in the form of a computer program are presented. The strategy for determining the next phase in the casting cycle is described and the details are given for formulating the stiffness equations and loads for each phase. Several example problems are presented to demonstrate the use of such a procedure in assisting to make critical decisions regarding planning of the casting schedule and determining when formwork can be safely removed.