Abstract
This paper presents the numerical results of concrete footing‐soil foundation seismic interaction mechanism. The concrete footing has been made with two different shapes, but with the equal volume of concrete material. The concrete footing‐soil foundation has been analyzed using nonlinear finite elements, with the fixed‐base state. The simulated near‐fault ground motions have been applied to the concrete footing‐soil foundation. The problem has been formulated based on the settlement controlled analysis. The local geotechnical conditions of all configurations have been analyzed. The numerical analysis results indicate that the shape of a concrete footing alters seismic response, revises inertial interaction, enhances damping ratio, improves load carry capacity, modifies cyclic differential settlement, revises failure patterns, minimizes nonlinear deformation, and changes cyclic strain energy dissipation. The novelty of this research work is the strain energy has more been dissipated with artistic concrete footing design.
Highlights
A number of the buildings have been collapsed due to improper soil-footing interaction; it has occurred when dynamic or seismic forces have been applied to them. e improvement of soil-footing seismic interaction mechanism is an art in geotechnical earthquake engineering design and needs to select appropriate footing shape to enhance the safety of the structure
Earthquake includes differential settlement, but the shape of concrete footing in producing differential settlement has not been studied with considering seismic response at the base of a concrete footing, energy dissipation, hysteretic soil damping, strain travel paths, inertial interaction, nonlinear deformation patterns, and footing-soil seismic interaction mechanism
The morphology of concrete footing significantly affects the amplitude of earthquake ground motions; it may be known as “geomorphological conditions effect” in concrete footing-soil foundation seismic design. e numerical analysis results have confirmed that the geomorphological condition influence to strain energy dissipation, and this process leads to developing nonlinear deformation patterns and differential settlement with the specific shape at each configuration, and subsequently, it is understood that the geomorphological conditions are important in the distribution of earthquake damage. e flexible soil foundation area-to-ridge concrete footing area interaction is responsible for the failure mechanism of soil foundation at each configuration
Summary
The Effect of Concrete Footing Shape in Differential Settlement: A Seismic Design. Is paper presents the numerical results of concrete footing-soil foundation seismic interaction mechanism. E concrete footing has been made with two different shapes, but with the equal volume of concrete material. E concrete footing-soil foundation has been analyzed using nonlinear finite elements, with the fixed-base state. E simulated near-fault ground motions have been applied to the concrete footing-soil foundation. E problem has been formulated based on the settlement controlled analysis. E numerical analysis results indicate that the shape of a concrete footing alters seismic response, revises inertial interaction, enhances damping ratio, improves load carry capacity, modifies cyclic differential settlement, revises failure patterns, minimizes nonlinear deformation, and changes cyclic strain energy dissipation. E novelty of this research work is the strain energy has more been dissipated with artistic concrete footing design Is paper presents the numerical results of concrete footing-soil foundation seismic interaction mechanism. e concrete footing has been made with two different shapes, but with the equal volume of concrete material. e concrete footing-soil foundation has been analyzed using nonlinear finite elements, with the fixed-base state. e simulated near-fault ground motions have been applied to the concrete footing-soil foundation. e problem has been formulated based on the settlement controlled analysis. e local geotechnical conditions of all configurations have been analyzed. e numerical analysis results indicate that the shape of a concrete footing alters seismic response, revises inertial interaction, enhances damping ratio, improves load carry capacity, modifies cyclic differential settlement, revises failure patterns, minimizes nonlinear deformation, and changes cyclic strain energy dissipation. e novelty of this research work is the strain energy has more been dissipated with artistic concrete footing design
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