Vibration Control of Dynamically Similar Buildings Optimally Connected by Viscoelastic Dampers
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ORIGINAL CONTRIBUTION
Vibration Control of Dynamically Similar Buildings Optimally Connected by Viscoelastic Dampers Ramakrishna Uppari1
•
Mohan Sasalpur Chandrashekar1
Received: 3 January 2020 / Accepted: 21 August 2020 The Institution of Engineers (India) 2020
Abstract Recently, the construction of similar high-rise buildings has increased due to the increasing population. Moreover, due to space constraints, these structures are being built next to each other. When such tall buildings are located in high seismic zones, earthquake protection becomes essential. There have been many studies on vibration control by connecting dampers to adjacent dissimilar buildings. However, reviews with specific recommendations on damper connections to adjacent similar buildings are found to be scarce. This study aims to control the building vibration that is dynamically similar and adjacent to each other through damper connections. In this study, two adjacent ten-storied, dynamically similar RC buildings are considered. The buildings are modeled with shear frame and lumped mass for efficient yet straightforward analysis. The idealized shear buildings were connected with viscoelastic dampers using different damper configurations and then subjected to seven seismic ground motions. A numerical integration technique is used to obtain the seismic response, and a single objective particle swarm optimization technique is employed to optimize the position of dampers. The viscoelastic dampers provided at their optimal locations improved the seismic performance of coupled buildings in an economical way.
& Ramakrishna Uppari [email protected] Mohan Sasalpur Chandrashekar [email protected] 1
Civil Engineering Department, BITS PILANI Hyderabad Campus, Hyderabad, Telangana 500078, India
Keywords Similar adjacent buildings Viscoelastic damper Coupled control Optimal damper configuration Particle swarm optimization
Introduction It is difficult to predict the exact location and timing of earthquakes. Earthquakes cause significant damages to many buildings, except for a few. The reason for the survival of these few buildings is their design and construction. Hence, it is essential to enable the buildings to resist an earthquake with an appropriate method to mitigate the damage and reduce seismic vulnerability. The seismic performance of buildings against earthquakes should be well studied to adapt a suitable technique to minimize damage. The buildings adjacent and close to each other can undergo damage due to the pounding effect. The pounding behavior of adjacent inelastic multistory structures was carried out [1]. Two plan asymmetric adjacent dissimilar structures were tested for the torsional ponding effect [2]. The pounding effect increases the response of stiff buildings while reducing the response of flexible buildings. The pounding force of a heavy and rigid structure is inadvertently complex to the mass ratio of adjacent structures [3]. The soil–structure interaction with the pounding
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