Study of the influence of the rigidity of the above-ground structures of the panel house on the stress-deformed state of the pile foundation
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Abstract
A study of the influence of the rigidity of the above-ground structures of a nine-story panel building on the stress-deformed state of its pile foundation was carried out.
For the study, several models of the house with the same above-ground parts were created, which differed from each other in terms of the construction scheme of the basement floor: monolithic reinforced concrete or prefabricated reinforced concrete, the load-bearing walls also change: along the letter or numerical coordination axes.
The main advantage of panel houses is that their construction (arrangement) takes significantly less time than the construction of a similar house with the same area and building volume, but with a different structural scheme (wall or with the use of a monolithic reinforced concrete frame).
Numerical modeling of panel buildings, namely the joints in the places where prefabricated reinforced concrete elements are joined, is difficult for engineers, because numerical modeling can be performed in several ways, which were given and described in the work [1].
The stress-deformation state of the pile foundation (longitudinal forces in the piles, bending moments in the raft) and normal stresses in the vertical load-bearing elements of the basement with different structural schemes of the basement floor and different load-bearing walls were analyzed. Quantitative and qualitative changes in the bending moments in the rat were revealed, the same differences were found in the stresses of the vertical bearing elements of the basement.
The analysis of the bending moments in the raft made it possible to identify and investigate the influence of the stiffness of the basement floor structures on the stressed-deformed state of the pile foundation (rafts). The effect of vertical seams between wall panels on bending moments in the grid was revealed. The effect of the vertical seam between the wall panels is manifested in the fact that the values of the bending moments change both quantitatively (increased by several times) and qualitatively. The use of monolithic structures as basement walls leads to a more smooth curve of bending moments in the raft.
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