Abstract
The research paper focuses on internal forces determination in the elements of modular buildings under wind load. It provides a methodology for determining dynamic characteristics of a building and for calculating wind loads. This method is based on the following assumptions: coupling of the modules elements is rigid; coupling of block-modules with foundations is hinged-fixed; connection of blocks to each other is hinged in angular points; the floor disk in its plane is not deformed. On the basis of these assumptions the authors derived approximate and refined equations for determining forces in modules elements under static and pulsation components of wind load. The equation of bending moments determination in the pillar bearing cross-section is obtained by approximation of the graph of moments variation, calculated for the spectrum of the ratio of the pillar stiffness and the floor beam in the range from 1/64 to 64. The paper further introduces the calculation results of forces based on the proposed methodology and on the finite element method. The calculations were done while taking different values of wind load and different number of storeys in a building (from 1 to 4 floors). The obtained results are similar, the error does not exceed 5%.
Highlights
At present, modular buildings are actively used in construction
In articles [8, 9] it is shown that static and dynamic operation study of modular buildings is a currently important direction. The relevance of such studies is determined by the following reasons: - modular buildings application on territories with harsh climate and complex seismic conditions; - tridimentional structural behavior; - the lack of regulatory framework for modular building design
In article [8] it was shown that the wind load can have a significant effect on the stressstrain behavior (SSB) of the modular building
Summary
Modular buildings are actively used in construction. Modular technology is relatively new in our country. In articles [8, 9] it is shown that static and dynamic operation study of modular buildings is a currently important direction. The relevance of such studies is determined by the following reasons: - modular buildings application on territories with harsh climate and complex seismic conditions; - tridimentional structural behavior; - the lack of regulatory framework for modular building design. The FEM has the following drawbacks: - it is necessary to have complete information on the structure stiffness and its geometry; - in most cases it is necessary to create a tridimentional design model of construction. It is advisable to have an analytical technique for determining the wind load on the building and the effort from it
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