Development of a rational design methodology for precast concrete slender spandrel beams: Part 1, experimental results

Development of a rational design methodology for precast concrete slender spandrel beams: Part 2, analysis and design guidelines

“…3 were reinforced with additional flexural and local reinforcement to avoid premature flexural failure and induce end-region behavior, as described in the companion paper. 1 The comparison shown in the figure indicates that the analytical model was capable of predicting the observed skewed-diagonal end-region failure mode for the L-shaped and corbelled spandrels. Figure 4 compares a representative vertical load-deflection prediction with the experimental results.…”

“…The degree of lateral deformation was influenced by the deck connections, as discussed in detail in the technical report. 2…”

“…One component of the torque vector, defined in the analysis as T ub , will act to bend the spandrel web out of plane about the diagonal axis defined by the diagonal crack angle θ (Eq. [1]). The second component of the torque vector, defined in the analysis as T ut , acts to twist the web about an axis perpendicular to that diagonal crack (Eq.…”

“…The second component of the torque vector, defined in the analysis as T ut , acts to twist the web about an axis perpendicular to that diagonal crack (Eq. [2]).…”

“…It is well documented that face-shell spalling and spiral cracking do not develop in slender spandrel beams at failure, though these limit-state behaviors are implicitly assumed in current practice. [1][2][3][4][5] The design method found in the sixth edition of the PCI Design Handbook: Precast and Prestressed Concrete 6 often results in conservative, heavy reinforcement results 1 to study the various parameters that influence the behavior of slender L-shaped spandrel beams.…”