Dynamic Behavior of the Palazzo Lombardia Tower: Comparison of Numerical Models and Experimental Results

Cigada, Alfredo; Mola, Elena; Mola, F.; Stella, Gianfranco; Vanali, Marcello

doi:10.1061/(asce)cf.1943-5509.0000431

Cited by 11 publications

(12 citation statements)

References 20 publications

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“…In order to be able to monitor vibration comfort levels against wind serviceability [11][12] and perform operational modal analysis identifications [9][10] very high sensitivity low noise accelerometers had to be employed. Moreover, the building first natural frequency is around 0.3 Hz [1] [3], thus posing problems both on the sensor choice and the data acquisition hardware.…”

Section: Selected Sensorsmentioning

confidence: 99%

“…To the aim of identifying at least the first three vibration modes of the structure (2 bending modes and the 3 rd torsional one [1] [3]) and according to the commitment request, a total number of 24 piezo accelerometers have been installed at five different levels of the Core 1 tower. Figure 2 shows the instrumented floors and the different sensors that are installed.…”

Section: Sensor Positioningmentioning

confidence: 99%

“…According to the sensor positions illustrated in Figure 3, it is possible to identify and distinguish the two principal bending modes and the first torsional one. It will also be possible to study the higher modes and compare them with what was identified during the validation testing at the end of the construction phase [1] [3].…”

Section: Sensor Positioningmentioning

confidence: 99%

“…Due to the building strategic relevance, a number of dynamic tests have been performed at the end of the construction phase in order to assess the structure dynamic behavior and update the FE model to seismic resistance purposes [1,2,3]. After these tests the first principal vibration modes and their associated mode shapes are known and set the base for the planned long term monitoring of the structure.…”

Section: Introductionmentioning

confidence: 99%

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Design and Installation of a Permanent Monitoring System for Palazzo Lombardia in Milano, Italy

Berardengo¹,

Cigada²,

Manzoni³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Section: Selected Sensorsmentioning

confidence: 99%

Section: Sensor Positioningmentioning

confidence: 99%

Section: Sensor Positioningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and Installation of a Permanent Monitoring System for Palazzo Lombardia in Milano, Italy

Berardengo¹,

Cigada²,

Manzoni³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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“…This was the case for the Allianz Tower: both the project Validator and the Owner agreed on the opportunity of carrying out dynamic tests at the end of construction: it was decided to use the Operational Modal Analysis method, so that only the environmental excitation would be exploited to derive the modal properties, with no need to move and install large tools at the top of the building to provide additional forcing, which would have been required for Experimental Modal Analysis, [2].…”

Section: Introductionmentioning

confidence: 99%

The Use of OMA for the Validation of the Design of the Allianz Tower in Milan

Mola

Stefopoulos

et al. 2016

Conference Proceedings of the Society for Experimental Mechanics Series

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Future headquarter of an insurance company, the Allianz Tower is a 202m high, 52-storey building currently topped out and belonging to the large CityLife development in Milan, Italy. The architectural design concept, by Arata Isozaki, is that of a slender, streamlined machine-building, with exposed structural and functional systems. The very significant slenderness and the intrinsic damping properties of the Tower make lateral and torsional response due to wind actions not negligible for structural analysis and occupant comfort. To mitigate these effects eight external viscous dampers were designed,and located at the base of four steel "struts", stemming out of the surrounding plaza and podium at the base of the tower and connected to its main cores at the 11th floor. The design of the dampers and of the struts required refined analyses to be carried out. At the end of construction, two sets of Operational Modal Analysis (OMA) tests were carried out on the building, with and without dampers, to validate the design and construction process. Moreover, given the importance of the building, the Tower was equipped with a state-of-the-art continuous monitoring system acquiring data on all of the relevant structural and functional parts, including the dampers. The present paper will present the main structural features of the Tower, the main features of the design of the damping devices for wind comfort, the test set up for the dynamic OMA tests, followed by a discussion of their results.

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Continuous monitoring of the dynamic behavior of a high‐rise telecommunications tower

Ribeiro

Leite

Pinto

et al. 2019

Structural Design Tall Build

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Summary This article describes the experimental evaluation of the dynamic effects induced by wind on a high‐rise telecommunications tower based on a permanent monitoring system. Monte da Virgem telecommunications tower is located near the city of Porto (Portugal), and its structure consists in a reinforced concrete shaft and a steel mast, with a total height of 177 m. The monitoring system includes accelerometers, anemometers, and a meteorological station, allowing the characterization of the maximum accelerations of the structure and wind regimes during a period of 6 months. The analysis of the results enabled identifying specific events, denominated as critical events, for which the dynamic response of the tower under wind actions appears significantly amplified due to wind aeroelastic instability phenomena in the steel mast. The automatic identification of the critical events was based on the application to the acceleration's records of an autoregressive model and estimation of its optimal order number based on a singular value decomposition. The results proved the robustness and efficiency of the proposed technique in identifying the number, duration, and maximum amplitude of accelerations associated to the critical events, envisaging its potential integration in structural health monitoring systems.

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Dynamic Behavior of the Palazzo Lombardia Tower: Comparison of Numerical Models and Experimental Results

Cited by 11 publications

References 20 publications

Design and Installation of a Permanent Monitoring System for Palazzo Lombardia in Milano, Italy

Design and Installation of a Permanent Monitoring System for Palazzo Lombardia in Milano, Italy

The Use of OMA for the Validation of the Design of the Allianz Tower in Milan

Continuous monitoring of the dynamic behavior of a high‐rise telecommunications tower

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