Analysis of the influence of modern building materials on the stress-strain state of multi-storey frame buildings in seismically active regions
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Abstract
The study is devoted to a comprehensive analysis of the impact of innovative building materials on the stress-strain state (VAT) of reinforced concrete frame buildings erected in seismically active regions. Based on multifactorial numerical modeling and experimental data, patterns of stress distribution in structural elements have been identified when using high-strength concretes, composite reinforcement and light aggregates. It was found that the use of fiber-reinforced concrete with polypropylene fibers reduces peak stress values by 17-23% and increases the period of natural vibrations of the structure by 0.4-0.6 s. Mathematical modeling based on the finite element method confirmed the increased dissipative capacity of nodal joints using carbon fiber reinforcement elements, which is expressed in a decrease in the amplitude of accelerations by 32-44% with seismic impacts of 7-9 points. The critical ratios of stiffness and mass parameters for optimal seismic response of structures using various combinations of modern materials have been identified. The results obtained make it possible to develop refined methods for designing multi-storey buildings with increased seismic resistance, taking into account the nonlinear behavior of new materials under dynamic influences.
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References
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