Seismic analysis of base isolated buildings

Barbat, Álex H.; Bozzo, Luis M.

doi:10.1007/bf03020128

Cited by 40 publications

(17 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the box-behavior of this type of buildings, and that more than the 90% of the mass is activated by the first three significant modes for each considered direction (X, Y), the influence of higher modes can be neglected, and, therefore, the structural behavior is predominantly influenced by the first mode (Barbat 1982;Priestley et al 1996;Barbat and Bozzo 1997;Barbat et al 2005;Fardis 2009). …”

Section: Urm Building and Pushover Analysismentioning

confidence: 99%

Non-linear static procedures applied to high-rise residential URM buildings

González-Drigo

Avila-Haro

Pujades

et al. 2016

Bull Earthquake Eng

Self Cite

View full text Add to dashboard Cite

Abstract. In this work, the vulnerability of an unreinforced masonry building, evaluated on the one hand by using the incremental dynamic analysis, and on the other hand by using nine representative non-linear static incremental procedures, is compared. For comparison reasons among the different non-linear static procedures, the obtained incremental dynamic analyses results are used as reference values. The aim of this analysis is to evaluate the applicability and reliability of the diverse non-linear static procedures for unreinforced masonry buildings, and to propose modifications oriented to improve their use in this typology of structures. For this purpose, a fully representative unreinforced masonry building of the dominating building type in the Eixample district of Barcelona, is analyzed. Furthermore, the conditional spectrum approach procedure has been applied with the aim to conveniently define the seismic demand. Regarding the definition of the fragility curves, two different methodologies were used for each non-linear static procedure and incremental dynamic analyzes. Subsequently, the corresponding damage indices as well as the damage curves were calculated and compared for the different considered peak ground acceleration values. The results of this comparison seem to confirm that the damage curves obtained by performing the NSP and by applying the Risk-UE methodology overestimate the damage corresponding to low values of the PGA and underestimate the damage for higher values of the PGA.

show abstract

Section: Urm Building and Pushover Analysismentioning

confidence: 99%

Non-linear static procedures applied to high-rise residential URM buildings

González-Drigo

Avila-Haro

Pujades

et al. 2016

Bull Earthquake Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since a real system is not available for a true implementation, a mathematical model is adopted as the "true" system. Specifically, we use the well-known Bouc-Wen model, 4,21,26 which represents the nonlinear restoring force φ in the form…”

Section: Application: Control Of a Hysteretic Oscillatormentioning

confidence: 99%

“…[3][4][5] Another recent source of interest for hysteresis in mechanical and structural systems comes from the new "smart" materials and devices used for vibration control. Materials such as shape memory alloys 6 and electro/magnetorheological fluids 7,8 have been proposed for this purpose, which exhibit complicated hysteretic behaviors.…”

mentioning

confidence: 99%

Adaptive backstepping control of a class of hysteretic systems

2003

View full text Add to dashboard Cite

A backstepping-based adaptive control is designed for a class of one degree of freedom hysteretic system. The true hysteretic behavior does not need to be known for the controller design. A polynomial description is assumed with uncertain coefficients and an uncertain residual function. These uncertainties are bounded and lump the discrepancies between the adopted description and the real hysteretic behavior. The adaptive controller is able to handle these uncertainties and make the closed loop globally uniformly ultimately bounded when the system is subject to an unknown excitation from which a bound is known. The efficiency of the approach is tested by numerical simulations on a hysteretic system under a seismic excitation. This system is mathematically described by the differential Bouc-Wen model, which is widely used in structural dynamics.

show abstract

“…The use of base isolation devices is an advanced technique in the ÿeld of earthquake-resistant design which is being used in many countries. Among the di erent types of devices in existence, laminated elastomeric bearings are probably the most widely used nowadays [1][2][3]. They are composed of layers of rubber and steel, the rubber being vulcanized to the steel layers.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of base isolated buildings subjected to earthquake loads

Salomón

Oller

Barbat

1999

Int. J. Numer. Meth. Engng.

View full text Add to dashboard Cite

SUMMARYA ÿnite element formulation modelling hyperelastic quasi-incompressible rubber-like materials (elastomers) is developed which takes into account large displacements and large elastic strains as well as inelastic e ects. The capacity of laminated rubber-like materials to support high loads in compression and large displacements in shear is the principal reason for their use in devices for seismic base isolation of structures. The energydissipation capacity of these devices is increased by using high damping rubber, which is an elastomer incorporating carbon black particles, or having lead-plug insertion. The Ogden strain energy function has been used as a basis for the material model implemented in a total Lagrangian formulation, the strain being decomposed into its deviatory and volumetric parts and the pressure variable being condensed at element level. Mooney-Rivlin and neo-Hooke strain energy functions can also be used by simply changing the parameters of the model. The stress-strain hysteresis, which appears when these devices are subjected to dynamic or quasistatic cyclic loads, has been modelled by frequency dependent viscoelastic and plastic constitutive models. The bearings have been modelled by means of an equivalent single element capable of describing the composite behaviour of the actual isolation system. The proposed model is validated using available experimental results and it is proved to be a powerful tool in dealing with di erent bearings. Finally, results for a six-storey base isolated building subjected to the El Centro earthquake are given.

show abstract

Seismic analysis of base isolated buildings

Cited by 40 publications

References 35 publications

Non-linear static procedures applied to high-rise residential URM buildings

Non-linear static procedures applied to high-rise residential URM buildings

Adaptive backstepping control of a class of hysteretic systems

Finite element analysis of base isolated buildings subjected to earthquake loads

Contact Info

Product

Resources

About