General Information
Figure 1 shows the construction site of a pavilion.
The project consists of building several pavilions alongside a lake. A pavilion consists of four reinforced concrete columns, two benches, and a Dutch gable roof. The distance between the reinforced concrete columns l ≅ 3.5 m, and the distance w ≅ 2.5 m.
Bench Concept
Figure 2 shows a bench under construction.
The bench consists of three legs (1 to 3) and a seat. The end legs (1 and 3) are made of autoclaved aerated concrete (AAC) blocks and concrete, which is poured into the space between the AAC blocks and the RC columns; the central leg (2) is made of AAC blocks. The seat reinforcement consists of longitudinal and transverse rebars with 90-degree bent ends (bottom reinforcement only). The longitudinal rebars are placed directly (without cover) over the formwork panels and have a bigger diameter and a shorter spacing than the transverse rebars, which are placed directly over the longitudinal ones. Figure 3 shows an end leg region.
The RC columns are connected by direct contact.
Figure 4 shows the pavilion during construction with finished benches.
New Bench Concept
The bench concept was changed; all pavilions were demolished until the foundation, as shown in figures 5 and 6.
How many resources are used for the construction of the pavilions and their demolition until the foundations?
Figure 7 shows the construction site of a new pavilion.
The new bench consists of two legs (the columns) and a seat made of reinforced concrete. The seat has an asymmetric inverted U-like shape and is connected to the legs by rebars. Figure 8 shows a finished bench.
The cross-section shape of the seat is shown in yellow. Figure 9 shows a new pavilion with the steel roof structure.
The RC columns are partially confined with AAC blocks.
Does the pavilion have a structural safety or serviceability problem without the AAC blocks?