Case study: Post-earthquake model updating of a heritage pagoda masonry temple using AEM and FEM

Soti, Rajendra; Abdulrahman, Linh; Barbosa, André R.; Wood, Richard L.; Mohammadi, Mohammad Ebrahim; Olsen, Michael J.

doi:10.1016/j.engstruct.2019.109950

Cited by 21 publications

(3 citation statements)

References 30 publications

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“…The refinement of models' calibration in the elastic range was carried out acting: on the masonry stiffness properties (more specifically on the Young Modulus E and the Shear Modulus G), for both SWs; also on the stiffness of the diaphragms, in the case of 3Muri. It should be pointed out that other sources that can contribute to the increased frequencies measured in AVT results, such as the explicit modelling of structural and non-structural elements (Soti et al 2020) or the impact of the mass distribution and of non-structural elements (Mugabo et al 2019), were neglected. Actually, the role of the non-structural elements can be relevant particularly in structures less massive and less stiff than masonry buildings.…”

Section: Refinement Of Ef Models: Calibration In the Elastic Range Through Dynamic Identificationmentioning

confidence: 99%

On the reliability of the equivalent frame models: the case study of the permanently monitored Pizzoli’s town hall

Abbati

Morandi

Cattari

et al. 2021

Bull Earthquake Eng

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This paper presents the comparison of the results of modal and nonlinear analyses carried out on a 2-story masonry building with rigid diaphragms, inspired by the Pizzoli’s town hall (AQ, Italy). The case study is one of the Benchmark Structures (labeled BS6) in the “URM nonlinear modelling–Benchmark project” funded by the Italian Department of Civil Protection (DPC) within the framework of the ReLUIS projects. The building has been instrumented since 2009 with a permanent monitoring system by the Osservatorio Sismico delle Strutture (OSS) of the DPC and was hit by the 2016/2017 Central Italy earthquake sequence. In the research first phase, modal and nonlinear static analyses were carried out in a blind prediction, without any preliminary calibration of the models, but referring only to commonly made assumptions on materials and modelling. Five computer programs based on the Equivalent Frame Model (EFM) approach were used. Four different structural configurations were considered: with weak spandrels (A), with tie rods coupled to spandrels (B), with RC ring beams coupled to spandrels (C) and with “shear type” idealization (D). In the research second phase, two of the developed EFMs were calibrated in the elastic range using the results of available Ambient Vibration Tests (AVTs). The models were then validated in the nonlinear range by simulating the dynamic response of the structure recorded during the mainshocks of the 2016/2017 Central Italy earthquake. Recorded and numerical results were compared at both the global and local scale.

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Section: Refinement Of Ef Models: Calibration In the Elastic Range Through Dynamic Identificationmentioning

confidence: 99%

On the reliability of the equivalent frame models: the case study of the permanently monitored Pizzoli’s town hall

Abbati

Morandi

Cattari

et al. 2021

Bull Earthquake Eng

View full text Add to dashboard Cite

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“…Qiao et al introduced the retrofitting solution and earthquake assessment of an ancient wooden pavilion with over 500 years history in China 23 . The structural model of a masonry temple considering postearthquake updating was developed to evaluate the seismic behavior after the Gorkha Nepal earthquake in 2015 24 . The injection anchors between timber floors and masonry walls were proposed to improve the seismic safety of historical buildings 25 .…”

Section: Introductionmentioning

confidence: 99%

“…23 The structural model of a masonry temple considering postearthquake updating was developed to evaluate the seismic behavior after the Gorkha Nepal earthquake in 2015. 24 The injection anchors between timber floors and masonry walls were proposed to improve the seismic safety of historical buildings. 25 Karantoni et al present a performance-based seismic assessment procedure of traditional timber-laced houses in the Balkan region.…”

Section: Introductionmentioning

confidence: 99%

Experiment investigation and in situ test of hybrid vibration bearing system applied to overtrack historical buildings

Luo

Wei-hua

et al. 2022

Structural Contr & Hlth

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Summary The metro‐induced vibrations and seismic safety are both big issues for historical buildings in modern cities. This paper proposed a novel hybrid vibration bearing (HVB) to isolate horizontal earthquakes and mitigate vertical metro‐induced vibrations. The HVB consists of lead rubber bearing and thick rubber bearing with decoupled horizontal and vertical behaviors. The mechanical model of HVB is developed, and a new vertical stiffness formula of thick rubber bearing is proposed to calculate the compression stiffness, without conducting test. A static test of the prototype HVB and a dynamic experiment of an SDOF system were performed. The bearing has stable behavior under different pressures and lateral deformations. The bidirectional test confirmed the decoupling characteristics. The isolation design and retrofitting of an overtrack historical building was conducted. After retrofitting, the average maximum vibration level and the average subfrequency vibration level decreased 25% and 18%, respectively. The horizontal accelerations of isolated structure were 65% to 70% of the input, and the shear strains of bearings were smaller than 200% under rare earthquakes. Finally, case study of structures with different types of foundations is introduced. The vibration mitigation efficiency of different structures is confirmed.

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Reducing uncertainty in seismic assessment of multiple masonry buildings based on monitored demolitions

Martakis

Reuland

Imesch

et al. 2022

Bull Earthquake Eng

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A significant part of the existing building stock in regions of low to moderate seismic hazard has been designed without modern seismic considerations and is, in the meantime, exceeding its design life span. The assessment of seismic performance poses an engineering challenge, due to unknown material properties, undocumented structural interventions and the scarcity of event-based information. Operational modal analysis has been applied in some cases to verify model assumptions beyond visual inspection. However, masonry buildings exhibit amplitude-dependent stiffness even at very low response amplitudes, raising questions about the validity of such methods. Planned demolitions provide engineers with the opportunity to leverage higher-amplitude vibrations generated during demolition activities to better understand the dynamic behaviour of existing buildings. This paper introduces a Bayesian model-updating framework, which aims at reducing uncertainty in seismic analysis, by fusing dynamic measurements with best-practice structural models. The proposed hybrid framework is applied to nine real masonry buildings, representative of existing residential buildings, as typically encountered in Switzerland, that have been monitored during controlled demolition. A vast reduction in prediction uncertainty is achieved through data-driven model updating, additionally exposing intra- and inter-typological differences in terms of seismic capacity and ductility. In addition, differences between updated model predictions and typical engineering assumptions and generic typological curves are discussed. Overall, this contribution demonstrates, applies and discusses the practical benefits of a straightforward methodology for fusing monitoring data into the seismic evaluation of existing masonry structures.

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Case study: Post-earthquake model updating of a heritage pagoda masonry temple using AEM and FEM

Cited by 21 publications

References 30 publications

On the reliability of the equivalent frame models: the case study of the permanently monitored Pizzoli’s town hall

On the reliability of the equivalent frame models: the case study of the permanently monitored Pizzoli’s town hall

Experiment investigation and in situ test of hybrid vibration bearing system applied to overtrack historical buildings

Reducing uncertainty in seismic assessment of multiple masonry buildings based on monitored demolitions

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