A prestressed precast beam in composite action with a cast in-situ topping is described in metric units with small dimensions.
Files prepared for this example are named ~GEOMET.xsf, ~MAT1.xsf, ~MAT3.xsf, ~MAT5.xsf, ~STAGE1.xsf, ~STAGE2.xsf, ~STAGE3.xsf and ~STAGE4.xsf.
This example was described Phillip J Thompson “Computer design of concrete members” Institution of Professional Engineers New Zealand, Transactions, v 21, n 1/CE, Nov 1994.
A floor spanning 14.800 m was subjected to 2.5 MPa superimposed dead load and 8.0 MPa live load.
Precast concrete ribs with pretensioned reinforcing were used at 2.725 m centres. Precast concrete infill panels spanned between these ribs. Cast in-situ topping concrete was placed over these infill panels to form the finished floor.
This analysis is of one rib with the parts of the infill panels and topping within half the distance to the adjacent ribs each side. Those parts of the infill panels are referred to as the Left Infill and the Right Infill.
This analysis is of one cross-section; a cross-section located 3.100 m from an end.
~GEOMET.xsf contains the shape, size and location of the various components and material descriptions assigned to those components.
~MAT1.xsf, ~MAT3.xsf and ~MAT5.xsf each contain descriptions of all the materials at various stages in the construction process.
The computations follow the chronological sequence of events in the construction process.
The computations are presented in stages; the various stages corresponding to the stages described in the published paper. Further, each stage is presented as though each stage is independent of the other stages.
Files ~STAGE1.xsf, ~STAGE2.xsf, …. are included so that any stage can be worked without a need to work the previous stages. ~STAGE1.xsf is the state of the computations at the end of stage 1 and so can be the starting point for stage 2: ~STAGE2.xsf is the state at the end of stage 2, … and so on. The starting point for stage 1 as described is ~MAT1.xsf.