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The need to use large-span structures arises in the design of public and industrial buildings. Glued arches are most often used as load-bearing structures for such buildings. With relatively high strength and low bulk density, plywood construction is economically feasible to use in longspan structures. In addition, glued wood has specialproperties in the operation of structures that are built in seismic areas. Also, it should be noted that the service life of such buildings is much higher than that of traditional metal and reinforced concretestructures. One of the problems of large-span, especially frame, buildings is the uneven subsidence of the supports, which is associated with the heterogeneity of the geological composition of the base (soils) orthe presence of layers of weak soils. This is especially true of such a constructive form as the arch, the change in the stress-strain state of which leads to a radical redistribution of stresses.Given the fact that the soil environment is more heterogeneous, survey data insufficiently describe the actual geological composition of the base of the building site. The biggest problem in the design ofstructures is the presence of lenses of weak soils in the areas of the foundations for load-bearing structures, which were not detected during engineering and geological surveys. The presence of even insignificant layers of weak soils can cause uneven subsidence of supports and changes in the stress-strain state of all structures.As a result of this work, the behavior of a building that partially fell on a layer of weak soils was studied. This is realized by numerical study of the influence of uneven subsidence of several buildingfoundations on the stress-strain state of the wholeframe, which allows to analyze the actual stressstrain state of the building and increase the reliability of the structure as a whole. |
