Stress and strain of uncracked sections - Concrete Structures: Stresses and Deformations - page 44

Figure 2.8 Stress and strain distribution in the section of Fig. 2.5(a) assuming that
pre-tensioning is used (Example 2.3): (a) condition at age t 0 immediately
after prestress transfer; (b) changes caused by creep, shrinkage and
relaxation.

Using these results and following the same procedure as in Example
2.2, the time-dependent changes in stress and strain are calculated and
the results shown in Fig. 2.8(b).

Example 2.4 Composite section: steel and post-tensioned concrete
Figure 2.9(a) shows the cross-section of a composite simply supported
beam made of steel plate girder and a prestressed post-tensioned con-
crete slab. The plate girder is placed fi rst in position and shored. Then