Seismic isolation of buildings for power stations considering soil-structure interaction effects

Tena‐Colunga, Arturo; Pérez-Rocha, Luis Eduardo; Avilés, Javier; Cordero-Macías, Cuauhtémoc

doi:10.1016/j.jobe.2015.08.001

Cited by 21 publications

(4 citation statements)

References 28 publications

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“…Seismic isolation aims to reduce seismic demand rather than increase the capacity of the structure. A flexible structural system from an earthquake resistance viewpoint is created by matching the fundamental frequencies of base-isolated structures and the predominant frequency contents of earthquakes [23].…”

Section: Principle Of Seismic Isolationmentioning

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: Principle Of Seismic Isolationmentioning

confidence: 99%

Design Optimization of a Hybrid Vibration Control System for Buildings

et al. 2023

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“…So, structural demands should be reduced for the protection of buildings and devices inside, which can be achieved with seismic protective systems. Isolation of structural system from the ground has prominent benefit in terms of protecting structures above the ground [3][4][5][6]. Friction pendulum and rubber bearing are two main types that are used for the isolation of superstructure.…”

Section: Introductionmentioning

confidence: 99%

Comparative fire-following-earthquake performance of code-compliant low-rise base-isolated structures

Cilsalar¹

2022

JSEAM

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Seismic base isolation is an effective way of protecting structures against seismic loads and is very effective in terms of both collapse mitigation of structures and protection of non-structural elements under severe ground shaking. In this study, the structural demand of base-isolated three- and four-story steel moment-resisting frames is determined in case of a fire event followed by an earthquake, and compared with the results of fixed-base frames, which have similar geometry, load, and seismic hazard for a location in California. Four compartments are selected as possible locations for fire events in each building, and beams and columns in those compartments are exposed to a representative temperature increase in time, which includes a cooling phase as well. Maximum, minimum, and residual axial force, and moment demands on elements of the fire compartments, and drift demand of structural frames on the first and second floor, where the fire is assumed to occur, are determined and compared. Results are given in terms of parameters of three-parameter log-normal distribution, hence fragility curves can be constructed for each response considered in the study. Seismic isolation is effective in reducing both maximum and residual drift demand of the frames, and axial force in the beam element for each compartment considered. Fixed-base frames have 20% more maximum axial load on beams. Beam and column elements in the four-story configuration are under relatively more moments in case of a fire, while the performance of three-story frames depends on the location of the assumed fire.

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“…However, there are important objections: (i) the cost is generally excessive, (ii) the architectural and functional impact is important, (iii) the ductility of the structure, due to the fact that in cases of strong excitations, the damage is concentrated on the main elements of the structures (walls, beams and columns) and, (iv) the high weight of the buildings that imply an increase in seismic forces. To address these limitations, two innovative approaches have been proposed: base isolator (Marano and Greco 2003;Yingli et al 2007;Tena-Colunga et al 2009;Liu et al 2011;Bîtcă et al 2015;Tena-Colunga 2015;Hadad et al 2017) and energy dissipator (Restrepo and Rahman 2007;Segués 2014).…”

Section: Introductionmentioning

confidence: 99%

Optimization and Effectiveness of The Placement of Energy Dissipators In Rc Frame Structures 

Domínguez¹

2021

Preprint

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This document explores and analyzes the optimization of the use and placement of energy dissipators in the bays of frame structures located in seismic zones. This study may be applied to new and existing buildings. In order to do this, three RC frames of 5, 10 and 15 stories are analyzed and compared, using four brace arrangements (Chevron braces San Andrés cross and diagonal braces (two cases)). The behavior of these frames is analyzed in terms of modal parameters, capacity curves (Push-over) and dynamic analyses (Time-History). For the study, the Lorca record of mean magnitude was used, also in this case, hysteretic dissipators have been used as they are cheap and easy to install solutions. The efficiency of the energy dissipators is improved as the frames increase in height. In the lower height frames, the use of braced solutions without any device improves the structural behavior. The ductility of all frames increases with the placement of dissipators.

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Seismic isolation of buildings for power stations considering soil-structure interaction effects

Cited by 21 publications

References 28 publications

Design Optimization of a Hybrid Vibration Control System for Buildings

Design Optimization of a Hybrid Vibration Control System for Buildings

Comparative fire-following-earthquake performance of code-compliant low-rise base-isolated structures

Optimization and Effectiveness of The Placement of Energy Dissipators In Rc Frame Structures

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Seismic isolation of buildings for power stations considering soil-structure interaction effects

Cited by 21 publications

References 28 publications

Design Optimization of a Hybrid Vibration Control System for Buildings

Design Optimization of a Hybrid Vibration Control System for Buildings

Comparative fire-following-earthquake performance of code-compliant low-rise base-isolated structures

Optimization and Effectiveness of The Placement of Energy Dissipators In Rc Frame Structures&nbsp;

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Optimization and Effectiveness of The Placement of Energy Dissipators In Rc Frame Structures