Tragwerksantwort Wiener Gründerzeithäuser unter Erdbebenanregung auf Grundlage des Wiener Erdbebensatzes/Seismic response of Viennese brick masonry buildings based on the Viennese ground motion set

Zusammenfassung In dieser Arbeit wird eine Strategie zur Abschätzung der Antwort von Wiener Gründerzeithäusern unter Erdbebeneinwirkung mithilfe von nicht-linearen Zeitverlaufsberechnungen vorgestellt. Im ersten Teil wird aus einer Datenbank ein Satz von 14 aufgezeichneten Erdbebenschrieben für den Standort Wien südwestlich der Donau extrahiert. Da diese Schriebe im Mittel das Antwortspektrum für diesen Standort in einem weiten Periodenbereich abbilden, können sie für den Erdbebennachweis einer großen Klasse von Tragwerken, deren Grundperioden in diesen Periodenbereich fallen, verwendet werden. Der zweite Teil widmet sich der Modellbildung unter Berücksichtigung des für den betrachteten Bauwerkstypus speziellen konstruktiven Aufbaus sowie der inelastischen Verformungskapazitäten des Tragwerks. Die beschriebene Strategie wird am sogenannten Wiener Gründerzeit-Mustergebäude angewendet, um dessen Antwort unter Erdbebenanregung abzuschätzen.

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Seismic response and retrofit of industrial brick masonry chimneys

Canadian Journal of Civil Engineering ◽

10.1139/l92-012 ◽

1992 ◽

Vol 19 (1) ◽

pp. 117-128 ◽

Cited By ~ 14

Author(s):

A. Ghobarah ◽

T. Baumber

Keyword(s):

Seismic Response ◽

Ground Motion ◽

Strong Motion ◽

Brick Masonry ◽

Wind Loading ◽

Earthquake Ground Motion ◽

Lumped Mass ◽

Mass System ◽

Higher Modes ◽

Recent Earthquakes

During recent earthquakes, the documented cases of collapsed unreinforced brick masonry industrial chimneys are numerous. Observed modes of structural failure are either total collapse or sometimes collapse or damage of the top third of the structure. The objective of this study is to analyze and explain the modes of observed failure of masonry chimneys during earthquake events, and to evaluate two retrofit systems for existing chimneys in areas of high seismicity. The behaviour of the masonry chimney, when subjected to earthquake ground motion, was modelled using a lumped mass system. Several actual strong motion records were used as input to the model. The shear, moment, and displacement responses to the earthquake ground motion were evaluated for various chimney configurations. It was found that the failure of the chimney at its base is the result of the fundamental mode of vibration. Failure at the top third of the structure due to the higher modes of vibration is possible when the chimney is subjected to high frequency content earthquakes. Higher modes, which are normally not of concern under wind loading, were shown to be critical in seismic design. Post-tensioning and the reinforcing steel cage were found to be effective retrofit systems. Key words: masonry, chimneys, behaviour, analysis, design, retrofit, dynamic, earthquakes, seismic response.

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The effect of ground motion vertical component on the seismic response of historical masonry buildings: The case study of the Banloc Castle in Romania

Engineering Structures ◽

10.1016/j.engstruct.2021.113346 ◽

2021 ◽

Vol 249 ◽

pp. 113346

Author(s):

Nicola Chieffo ◽

Marius Mosoarca ◽

Antonio Formisano ◽

Paulo B. Lourenço ◽

Gabriele Milani

Keyword(s):

Seismic Response ◽

Ground Motion ◽

Vertical Component ◽

Masonry Buildings ◽

Historical Masonry

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Seismic Response of Masonry Buildings in Historical Centres Struck by the 2016 Central Italy Earthquake. Impact of Building Features on Damage Evaluation

International Journal of Architectural Heritage ◽

10.1080/15583058.2021.1916852 ◽

2021 ◽

pp. 1-26

Author(s):

Maria Rosa Valluzzi ◽

Luca Sbrogiò ◽

Ylenia Saretta ◽

Heisha Wenliuhan

Keyword(s):

Seismic Response ◽

Central Italy ◽

Masonry Buildings ◽

Damage Evaluation ◽

Central Italy Earthquake ◽

Earthquake Impact

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Seismic rocking effects on a mine tower under induced and natural earthquakes

Archives of Civil and Mechanical Engineering ◽

10.1007/s43452-021-00221-7 ◽

2021 ◽

Vol 21 (2) ◽

Author(s):

Piotr Adam Bońkowski ◽

Juliusz Kuś ◽

Zbigniew Zembaty

Keyword(s):

Seismic Response ◽

Ground Motion ◽

Ground Surface ◽

Tall Buildings ◽

Earthquake Ground Motion ◽

Seismic Action ◽

Seismic Effects ◽

Copper Ore ◽

Rotational Components ◽

Natural Earthquakes

AbstractRecent research in engineering seismology demonstrated that in addition to three translational seismic excitations along x, y and z axes, one should also consider rotational components about these axes when calculating design seismic loads for structures. The objective of this paper is to present the results of a seismic response numerical analysis of a mine tower (also called in the literature a headframe or a pit frame). These structures are used in deep mining on the ground surface to hoist output (e.g. copper ore or coal). The mine towers belong to the tall, slender structures, for which rocking excitations may be important. In the numerical example, a typical steel headframe 64 m high is analysed under two records of simultaneous rocking and horizontal seismic action of an induced mine shock and a natural earthquake. As a result, a complicated interaction of rocking seismic effects with horizontal excitations is observed. The contribution of the rocking component may sometimes reduce the overall seismic response, but in most cases, it substantially increases the seismic response of the analysed headframe. It is concluded that in the analysed case of the 64 m mining tower, the seismic response, including the rocking ground motion effects, may increase up to 31% (for natural earthquake ground motion) or even up to 135% (for mining-induced, rockburst seismic effects). This means that not only in the case of the design of very tall buildings or industrial chimneys but also for specific yet very common structures like mine towers, including the rotational seismic effects may play an important role.

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