Necessity and adequacy of near-source factors for seismically isolated buildings

Saifullah, M. Khalid; Alhan, Cenk

doi:10.12989/eas.2017.12.1.091

Cited by 2 publications

(1 citation statement)

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“…The massive damaging potential of an earthquake can also cause major damage to structures and the contents of structures. Apart from the loss of lives, there is also an impact on the economy of countries due to damage to properties [1].…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of a Hybrid Vibration Control System for Buildings

et al. 2023

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Control of high-rise structures under seismic excitations was investigated using a passive hybrid control system consisting of a base-isolation (BI) subsystem and a passive tuned liquid column damper (TLCD) system. Both of the systems were optimized considering using the other system in the same structure. An optimization method was developed, and a computer code was written based on dynamic analysis of the structure and metaheuristic optimization methods. Within the scope of the study, a general solution was found by using many earthquake records during the optimization process. Moreover, one of the most suitable and successful metaheuristic algorithms was used in this study. In addition, numerical simulations were performed on a benchmark high-rise building structure to investigate the effectiveness of the optimized hybrid control system in controlling the seismic response of the building. The performance of the base-isolated TLCD-controlled structure was examined when the TLCD was placed on the base floor by using a set of 44 recorded ground motions as base excitations. Based on the results obtained from this study, the use of a base-isolation subsystem decoupling the superstructure from the ground motions by lowering the structure’s fundamental natural frequency reduces the structural responses of the building in most cases. The responses of the base-isolation subsystem were not too large since the parameters of the BI subsystem were optimized specifically for the investigated structure. Nevertheless, displacements of BI might exceed the maximum limit to undesirable values in some cases. The TLCD system appears to be quite effective in protecting the base-isolation subsystem by reducing its displacements to the maximum allowable limit or below when attached to it. Moreover, the proposed passive hybrid control system can effectively reduce the structural responses under seismic excitations.

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Section: Introductionmentioning

confidence: 99%

Design Optimization of a Hybrid Vibration Control System for Buildings

et al. 2023

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The Effect of Positioning of Seismic Isolators in a Reinforced Concrete Building

Yurdakul,

Yıldız

2024

Preprint

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Construction costs are increasing day by day. The importance of building the safest structures at the lowest cost is also increasing. For this purpose, it is necessary to design the structure in the best possible way without sacrificing safety. One way to ensure buildings are safe even during severe earthquakes is to include seismic isolation at the design stage. Judging by studies, seismic isolators are generally located at the lowest story of the building. However, the location of the seismic isolator on the lowest column has not been defined. In this study, the seismic isolator was located at the lower end and the top of the lowest story of the RC building to compare the effectiveness of its positioning. A high-damping rubber bearing (HDRB) was used as the seismic isolation device. Also, the effect of the absence of the diaphragm placed above the isolation level was investigated. As a result of the study, the necessary reinforcement of the RC building isolated at the top end of the column was less than 15% compared to the building isolated at the lower end of the columns for the beams. The base shear force of the building with seismic isolator located at the upper end of the column was 2.7% greater than that the building with the seismic isolator located at the lower end of the column.

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Necessity and adequacy of near-source factors for seismically isolated buildings

Cited by 2 publications

References 0 publications

Design Optimization of a Hybrid Vibration Control System for Buildings

Design Optimization of a Hybrid Vibration Control System for Buildings

The Effect of Positioning of Seismic Isolators in a Reinforced Concrete Building

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