The beams of reinforced concrete with straight or parabolic haunches have been used in different types of structures as buildings and bridges. The beams with haunches (non-prismatic beams) have the following advantages with respect to prismatic beams: a) The rigidity increases, b) The relative displacements decrease, c) The use of concrete and reinforcing steel is more efficient, d) The architectural forms are more attractive, e) Facilitate the placement of electrical, hydraulic, air conditioning and sanitary installations in the building.
The conventional procedure for the project of reinforced concrete beams has been to estimate the dimensions of the beam cross section, and to calculate the necessary steel area, in order to come to a solution. However, there are other solutions for the same beam. Through optimization techniques, it is possible to determine the section dimensions, steel areas and other beam parameters which minimize costs, meeting safety criteria. Thus, through optimization, an optimal solution is found. The design common practice is to provide the necessary reinforcement by flexural at the ends of the beams with haunches (top), extending at a distance equal to the anchoring length and development required to guarantee its nominal strength moment at the ends. Therefore, the longitudinal reinforcement is usually located in the zone of the haunches in top part, leaving the transition zone between the haunches and the intermediate prismatic section with reinforcement in below part.
Details
| Title | Visualizing Non-Rectangular Beams |
| Duration | 14 Mins |
| Language | English |
| Format | MP4 |
| Size | 34 MB |
| Download Method | Direct Download |
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