Seismic behaviour of asymmetric base isolated structures with various distributions of isolators

Kilar, Vojko; Koren, David

doi:10.1016/j.engstruct.2008.12.006

Cited by 84 publications

(43 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For dissipating the seismic energy and reducing the bearing displacement, a lead core has been inserted into the holes in the elastomeric bearing [31,32]. Sixteen equally sized LRBs were considered to be located under the inner core columns between the foundation and beam-slab system, consisting of an orthogonal mesh of RC beams (650/650 mm) [33,34]. e slabs at the base were identical to those of the other floors, as illustrated in Detail-1 of Figure 1.…”

Section: Modeling Of Base Isolation Systemmentioning

confidence: 99%

Seismic Performance Evaluation of Double‐Skin Semi‐Base‐Isolated Building Using Incremental Dynamic Analysis

Parsaeimaram

Fang

Luo

et al. 2018

Advances in Civil Engineering

View full text Add to dashboard Cite

Base isolation is a widely accepted earthquake damage prevention technique. is method decouples the superstructure from the base by putting a flexible layer under each column, thereby elongating the time period of structures. Semi-base isolation (SBI) in double-skin structures is an effective technique to reduce the dynamic responses of structures due to earthquake motions, by utilizing the isolation devices in part of it instead of the entire base. is study presents a double-skin structure consisting of outer fixed base frames with shear walls that have been detached from the inner core with a minor gap. e inner core of the structure has been dissociated from the base using the elastomeric bearings. Seismic response of 10-story double-skin structure with inner isolated core was compared to that of inner fixed base core to consider the yielding and collapse probability of the structure using the incremental dynamic analyses (IDA). e results showed that the time period in SBI buildings can be adjusted with the use of coupling beams between the inner and outer frames. Also, the time period and interstory drift ratio are both reduced as more floors are given coupling beams. However, these coupling beams are the most effective at the topmost floors.

show abstract

Section: Modeling Of Base Isolation Systemmentioning

confidence: 99%

Seismic Performance Evaluation of Double‐Skin Semi‐Base‐Isolated Building Using Incremental Dynamic Analysis

Parsaeimaram

Fang

Luo

et al. 2018

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…While there exist studies in which full representations are used to model the subject seismically isolated structures (e.g. Nagarajaiah et al 1991a;Shenton and Lin 1993;Nagarajaiah and Xiaohong 1999;Colunga andCruz 2002, 2007;Providakis 2008;Kilar and Koren 2009), there are many other studies where shear building representations are used (e.g. Lee and Medland 1979;Tadjbakhsh 1983, 1985;Koh and Balendra 1989;Marano and Greco 2003;Jangid 2003, 2004;Jangid 2007;Takewaki 2007).…”

mentioning

confidence: 98%

Shear building representations of seismically isolated buildings

Alhan

Sürmeli

2011

Bull Earthquake Eng

View full text Add to dashboard Cite

Seismic isolation, with its capability of reducing floor accelerations and interstory drifts simultaneously, is recognized as an earthquake resistant design method that protects contents of a building along with the building itself. In research studies, superstructures of seismically isolated buildings are commonly modeled as idealized shear buildings. Shear building representation corresponds to an idealized structure where the beams are infinitely stiff in flexure and axially inextensible; columns are axially inextensible; and rigid floors are supported on these columns. Although it is more convenient to model and analyze a shear building, such an idealization may influence the seismic responses of seismically isolated buildings. This study presents a comparison of the seismic performances of seismically isolated buildings with superstructures modeled as shear buildings to those with full three dimensional superstructures. Both linear and nonlinear base isolation systems with different isolation periods and superstructures with different number of stories are considered.

show abstract

“…In the case of HDNR systems, the natural rubber compound is used in order to have adequate inherent damping; while in the case of LRB systems, similar to low-damping rubber bearings, a central lead plug is used in order to increase the initial stiffness and energy dissipation capacity of the bearing. Many studies contributed to the evolution of base isolation during the last decades, in particular (Kelly, 1986(Kelly, , 1999Constantinou et al, 1990;Mokha et al, 1990;Skinner et al, 1992;Nagarajaiah et al, 1993;Naeim and Kelly, 1999;Symans and Constantinou, 1999;Providakis, 2008;Kilar and Koren, 2009;Morgan and Mahin, 2010;Pant et al, 2013;Sorace and Terenzi, 2014;Mazza and Mazza, 2016).…”

Section: Typesmentioning

confidence: 99%

Life-Cycle Cost Model and Design Optimization of Base-Isolated Building Structures

Mitropoulou

Lagaros

2016

Front. Built Environ.

View full text Add to dashboard Cite

Design of economic structures adequately resistant to withstand during their service life, without catastrophic failures, all possible loading conditions and to absorb the induced seismic energy in a controlled manner, was subjected to intensive research so far. Costly and extremely sensitive equipment, vital in commerce, business, education, and/or health care represent the contents of the contemporary structural systems. Frequently, structures themselves are less valuable than their contents. Moreover, following a catastrophic natural disaster, local communities requires that communication and emergency centers, hospitals, police, and fire stations to be fully operational. In conventional constructions, high floor accelerations are encountered in case of stiff buildings or large interstory drifts in flexible ones. These structural performance characteristics cause difficulties in protecting both building and its contents. As an efficient alternative design practice, base-isolated structures are considered, compared to the conventional fixed-base one. A critical evaluation of optimized fixed and base-isolated reinforced concrete buildings is performed in this study, with respect to the initial and total cost taking into account the life-cycle cost.

show abstract

Seismic behaviour of asymmetric base isolated structures with various distributions of isolators

Cited by 84 publications

References 13 publications

Seismic Performance Evaluation of Double‐Skin Semi‐Base‐Isolated Building Using Incremental Dynamic Analysis

Seismic Performance Evaluation of Double‐Skin Semi‐Base‐Isolated Building Using Incremental Dynamic Analysis

Shear building representations of seismically isolated buildings

Life-Cycle Cost Model and Design Optimization of Base-Isolated Building Structures

Contact Info

Product

Resources

About