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By: Somnath Sitaram Kadam and R. S. Londhe.
ABSTRACT
Earthquakes have historically been responsible for significant structural failures, often resulting in substantial economic losses and endangering human lives. One notable failure mechanism observed during seismic activity is seismic pounding, which occurs when adjacent buildings collide due to insufficient separation gaps. This phenomenon is particularly concerning in densely populated urban areas where space constraints often prevent the provision of adequate clearances between structures. Such impacts can lead to severe damage or even progressive collapse, especially when the adjacent buildings have different dynamic properties.
This study focuses on analysing the potential of Fluid Viscous Dampers (FVDs) to mitigate the effects of seismic pounding between two closely spaced G+10 storey symmetric reinforced concrete buildings. The structural behavior of the buildings was modeled and evaluated using SAP2000, a comprehensive software for seismic analysis and design.
To determine the effectiveness of the dampers, critical structural response parameters such as base shear, lateral displacement, inter-storey drift, and fundamental time period were assessed under seismic loading. These parameters were compared for cases with and without FVDs to understand their influence on seismic performance.
The findings from this research reveal that the incorporation of FVDs significantly improves the dynamic response of adjacent buildings by absorbing seismic energy and reducing structural vibrations. Consequently, the risk of pounding is minimized, which enhances the overall safety and durability of buildings during earthquakes. This study highlights the value of implementing supplemental damping devices in earthquake-prone zones and provides practical insights for engineers and urban planners involved in the seismic design of adjacent structures.
Citation:
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