Shaking Table Investigation on the Masonry Structures Behaviour to Earthquakes with Strong Vertical Component

Cavalagli, Nicola; Ciano, Matteo; Fagotti, Gianluca; Gioffré, Massimiliano; Gusella, Vittorio; Pepi, Chiara

doi:10.1007/978-3-030-34713-0_34

Cited by 4 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reference earthquake was the Norcia strong ground motion recorded in October 30th, 2016, the strongest event occurred during the 2016-2017 Central Italy seismic sequence, which was characterized by a significant vertical component. 59 The earthquake event was recorded by the seismic station close to the city of Norcia, named NRC, available from the Italian Strong Motion Network of the Italian Department of Civil Protection. As suggested by similitude…”

Section: Seismic Sequence and Forced Vibrationsmentioning

confidence: 99%

“…In particular, the two building models were affected by the same sequence of increasing amplitude earthquake acceleration time histories in order to compare the dynamic response of the two different structural resisting systems, URM and CM. The reference earthquake was the Norcia strong ground motion recorded in October 30th, 2016, the strongest event occurred during the 2016–2017 Central Italy seismic sequence, which was characterized by a significant vertical component 59 . The earthquake event was recorded by the seismic station close to the city of Norcia, named NRC, available from the Italian Strong Motion Network of the Italian Department of Civil Protection.…”

Section: Damage Detectionmentioning

confidence: 99%

“…Two models with identical geometry were built, and an experimental investigation was carried out using the shaking table at the ENEA laboratory in Casaccia, Rome, in order to compare the dynamic response of the two different construction types (i.e., URM and CM) to seismic loads. [57][58][59][60] This paper investigates on the effectiveness of vibration-based methods for dynamic identification and damage detection on masonry structures using the experimental data recorded during the shaking table test on the URM and CM models. In particular, the main focus is on the combined use of natural frequencies and associated vibration modes as damage sensitive parameters.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the last of these authors started a research program aimed to assess and improve the dynamic performance of masonry structures by using the CM technique. Two models with identical geometry were built, and an experimental investigation was carried out using the shaking table at the ENEA laboratory in Casaccia, Rome, in order to compare the dynamic response of the two different construction types (i.e., URM and CM) to seismic loads 57–60 …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Damage detection via modal analysis of masonry structures using shaking table tests

Pepi

Cavalagli

Gusella

et al. 2021

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

In the last two decades, the use of modal parameters to detect and localize structural damage has gained increasing interest in the scientific community. The work reported in the literature mainly deals with the change of natural frequencies due to changes in structural properties given by damage. This approach relies on the accurate modal parameters estimation, which is still a very difficult task especially when complex structural systems are of interest. Furthermore, damage detection and localization can be highly inaccurate if natural frequencies are used only, regardless of the associated mode shapes. This paper investigates the effectiveness of vibration-based methods for dynamic identification and damage detection on masonry structures using experimental tests and operational modal analysis. In particular, ambient vibration tests are first used to obtain modal parameters of two different building models made up of unreinforced and confined masonry, respectively. A shaking table is then used to give a sequence of increasing seismic loads to each of the two masonry models. Damage-induced variations of the modal parameters, i.e., natural frequencies and associated mode shapes, are estimated after each seismic level using the structural vibrations caused by a low-level white noise base excitation. The obtained results give useful information on the effectiveness of vibration-based methods to detect and localize different damage patterns on masonry structures using changes in the modal parameters. Furthermore, it was possible to assess the different seismic performance of the confined masonry structural system compared to the unreinforced masonry.

show abstract

Section: Seismic Sequence and Forced Vibrationsmentioning

confidence: 99%

Section: Damage Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Damage detection via modal analysis of masonry structures using shaking table tests

Pepi

Cavalagli

Gusella

et al. 2021

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

show abstract

“…23,[25][26][27][28][29][30][31][32][33] Second, the out-of-plane response of masonry walls is a form of rocking motion. [34][35][36][37][38][39][40][41][42][43][44][45][46][47] Third, ancient Greco-Roman and Chinese temples, as well as other monumental structures of historical significance respond mainly in rocking mode. [48][49][50][51][52][53][54][55][56][57][58] Lastly, important equipment or containers containing hazardous material respond in purely rocking or rocking and sliding mode.…”

Section: Introductionmentioning

confidence: 99%

Finite element modeling of free‐standing cylindrical columns under seismic excitation

Katsamakas

Vassiliou

2022

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Rocking motion is notoriously sensitive to the parameters that define it, with experimental tests oftentimes being non-repeatable. Therefore, validating numerical models using a deterministic approach is impossible, since the consistency of any benchmark experimental test is dubious. Three-dimensional rocking is even harder to predict than planar rocking. This paper presents a threedimensional finite element model to predict the statistics of the rocking/sliding response of free-standing cylindrical columns. The response parameters of interest were the maximum displacement at the top of the columns and the residual displacement. Three different columns with varying slenderness and size were examined. The columns were able to slide, rock, and wobble in all directions, with this behavior being representative of building components and monumental structures. The numerical results were statistically compared to a large database of experimental tests, proving the accuracy of the proposed model. The influence of all modeling and physical parameters was elucidated, employing a large number of non-linear time-history analyses. It is shown that, when the numerical parameters are varied within a reasonable range, they do not influence the statistics of the response, even though they influence each individual oscillation. The friction coefficient between the interfaces (physical parameter) can influence the statistics of the response and should be carefully selected. Energy dissipation should be modeled explicitly, following the physics of the problem.

show abstract

Rocking block simulation based on numerical dissipation

D’Altri,

Vlachakis,

de Miranda

et al. 2024

Nonlinear Dyn

View full text Add to dashboard Cite

In this paper, a computational approach based on numerical dissipation is proposed to simulate rocking blocks. A rocking block is idealized as a solid body interacting with its foundation through a contact-based formulation. An implicit time integration scheme with numerical dissipation, set to optimally treat dissipation in contact problems, is employed. The numerical dissipation is ruled by the time step and the rocking dissipative phenomenon at impacts is accurately predicted without any damping model. A broad numerical campaign is conducted to define a regression law in analytic form for the setting of the time step, depending on the block size and aspect ratio, the contact stiffness, as well as the coefficient of restitution selected. The so-obtained regression law appears accurate and an a posteriori validation with cases not in the training dataset confirms the effectiveness of the approach. Finally, the comparison with available experimental tests highlights the approach efficacy for free rocking and harmonic loading cases (in a deterministic sense), and for earthquake-like loading cases (in a statistical sense). It is found that rocking blocks with sizes of interest for structural engineering (e.g., cultural heritage structures) can be simulated with time steps within 10–3 ÷ 10–1 s, so allowing very fast computations.

show abstract

Shaking Table Investigation on the Masonry Structures Behaviour to Earthquakes with Strong Vertical Component

Cited by 4 publications

References 12 publications

Damage detection via modal analysis of masonry structures using shaking table tests

Damage detection via modal analysis of masonry structures using shaking table tests

Finite element modeling of free‐standing cylindrical columns under seismic excitation

Rocking block simulation based on numerical dissipation

Contact Info

Product

Resources

About