The importance of ambient and forced vibration measurements for the results of seismic performance assessment of buildings obtained by using a simplified non-linear procedure: case study of an old masonry building

Snoj, Jure; Österreicher, Michael; Dolšek, Matjaž

doi:10.1007/s10518-013-9494-8

Cited by 22 publications

(14 citation statements)

References 30 publications

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“…In their analyses, the lumped damage during demolition provided a valuable information about the correlation between dynamic response and structural health. Snoj et al (2013) have conducted a parametric study and investigate the importance of the identified elastic properties of existing structures for the accurate assessment of ductility. Namlı and Aras (2020) examined the dynamic effect of tunnel boring machine on superstructures during tunneling during subway construction, using operational modal analysis over a four-storey reinforced concrete structure in Turkey.…”

Section: Introductionmentioning

confidence: 99%

AMBIENT VIBRATION ANALYSIS of an INDUSTRIAL BUILDING

KARTAL¹,

Dere²,

Arslan³

2021

Uludağ University Journal of the Faculty of Engineering

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Due to the heavy and dynamic equipment, the vibration and resonance effects that are not encountered under static dead loading may amplify over time in industrial buildings. This might cause damage to the structural system and create human comfort problems while the structure is in service. In this study, ambient vibration testing of a building composed of reinforced concrete and steel structural systems and located at a boron processing plant in Turkey was performed. The velocities and accelerations caused by the sieve shaker system attached to the structure with springs, are evaluated under the effect of sample loading.

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Section: Introductionmentioning

confidence: 99%

AMBIENT VIBRATION ANALYSIS of an INDUSTRIAL BUILDING

KARTAL¹,

Dere²,

Arslan³

2021

Uludağ University Journal of the Faculty of Engineering

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“…Examples of forced excitation by means of a vibrodine are found in previous studies . A shaking device was also utilized to test the civic tower of Rieti (Italy), which was equipped with a tuned mass damper system placed on the roof of the building …”

Section: Introductionmentioning

confidence: 99%

Simple model for predicting the vibration transmission of a squat masonry tower by base forced vibrations

Ivorra

Giannoccaro

Foti

2019

Struct Control Health Monit

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This paper presents the analysis of the dynamic performances of a simple model related to a squat masonry tower situated in the Swabian Castle of Trani (Italy). The main objective of this paper is to introduce a novel strategy based on a simple model validated by experimental data for defining the influence of the excitation frequency on the structural damping dynamic transmission.To this aim, first, the accelerations have been acquired simultaneously in 23 points of the tower at different levels, both due to environmental vibrations and due to a series of sinusoidal forced vibrations applied at the base by using an electro-hydraulic shaker device specifically designed for the tests. Four different excitation frequencies have been then selected for exciting the structure.An operational modal analysis has been carried out by the environmental recordings and with the different forcing loads obtaining a very good correlation of the identified frequencies in all the cases. Then a digital filtering process has been applied over all the recorded signals to evaluate the specific contribution for each frequency generated by the shaking device at each level of the tower. Increments of damping ratio have been detected with these forced vibrations at the base. Finally, a simple frame numerical model has been developed to reproduce the dynamic amplification at the most significant locations of the tower. It has been updated not only to have the same main frequencies and modal shapes but also to get a similar response under forced vibrations at the base. A good correlation has been obtained between the model and the real structure for the base forced vibrations at different excitation frequencies in order to correctly predict the dynamic behaviour of the structure.

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“…Using ambient vibrations, properties of the soil and features regarding soil-structure interaction can be evaluated, as well. These qualitative observations at low amplitudes are then used to validate [14,15], as realistic as possible, a non-linear numerical model using the Applied Element Method [16]. The numerical model provides the failure modes of the structure subjected to various ground motion records.…”

Section: Introductionmentioning

confidence: 99%

“…It should be noted that, due to the simplifications in the numerical models and other uncertainties in the dynamic properties of structures, especially for URM buildings, no model updating (e.g. [15]) is undertaken in this study.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the seismic retrofitting of an unreinforced masonry building using numerical modeling and ambient vibration measurements

Michel¹,

Karbassi

Lestuzzi

2018

Engineering Structures

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Ambient vibration measurements and 3-D nonlinear time-history numerical modeling are used to assess the retrofitting measures conducted in a 6-story unreinforced masonry building (URM) built in the end of the 19 th century in Switzerland. Retrofitting measures were taken in order to improve the soundproofing and possibly the seismic performance of the building. Reinforced concrete (RC) footings were added under the walls and horizontal steel beams were added to link the walls together with a RC slab at each floor, though the wooden beams were left in place. Several ambient vibration recordings were performed before, during and after the retrofitting work in order to monitor the evolution of the dynamic behavior of the structure. Moreover, numerical models representing the state of the building before and after the retrofit work have been developed to perform nonlinear dynamic analyses using various ground motion records. The change in the modal vibration frequencies, mode shapes, and failure mechanism are presented and discussed in further details. According to ambient vibration measurements, the performed retrofitting resulted in an increase of about 25% of the fundamental frequency. From the results of both the numerical modeling and the ambient vibration measurements, it is confirmed that the in-plane behavior of the slabs evolved from non-rigid floors with in-plane deformation to rigid floors with diaphragm effects. The ambient vibration measurements show that the new stiff slabs could lead to torsion behavior in the building as the result of the diaphragm effect and to higher seismic demand. However, the numerical models show that the displacement capacity of the building increases as a result of those new stiff slabs. Consequently, higher deformation capacity, indicated by the inter-story drift values, on average, are observed for all the damage grades in the post-retrofit state of the building. Finally, the overall seismic safety was only slightly improved.

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The importance of ambient and forced vibration measurements for the results of seismic performance assessment of buildings obtained by using a simplified non-linear procedure: case study of an old masonry building

Cited by 22 publications

References 30 publications

AMBIENT VIBRATION ANALYSIS of an INDUSTRIAL BUILDING

AMBIENT VIBRATION ANALYSIS of an INDUSTRIAL BUILDING

Simple model for predicting the vibration transmission of a squat masonry tower by base forced vibrations

Evaluation of the seismic retrofitting of an unreinforced masonry building using numerical modeling and ambient vibration measurements

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